Ads.txt Alerts - Protect your revenue

toan123.vn Ads.txt file

<!DOCTYPE html>
<html lang="vi" prefix="og: https://ogp.me/ns#" class="loading-site no-js">
<head>
<meta charset="UTF-8" />
<link rel="profile" href="https://gmpg.org/xfn/11" />
<link rel="pingback" href="https://toan123.vn/xmlrpc.php" />

<script>(function(html){html.className = html.className.replace(/\bno-js\b/,'js')})(document.documentElement);</script>
<style>img:is([sizes="auto" i], [sizes^="auto," i]) { contain-intrinsic-size: 3000px 1500px }</style>
<meta name="viewport" content="width=device-width, initial-scale=1" />

<title>Cộng đồng toán học - Toan123.vn</title>
<meta name="description" content="Toan123 VN là cộng động những người yêu toán học Là nơi chia sẻ kiến thức, tài liệu học tập cho giáo viên và học sinh từ tiểu học đến THPT"/>
<meta name="robots" content="follow, index, max-snippet:-1, max-video-preview:-1, max-image-preview:large"/>
<link rel="canonical" href="https://toan123.vn/" />
<meta property="og:locale" content="vi_VN" />
<meta property="og:type" content="website" />
<meta property="og:title" content="Cộng đồng toán học - Toan123.vn" />
<meta property="og:description" content="Toan123 VN là cộng động những người yêu toán học Là nơi chia sẻ kiến thức, tài liệu học tập cho giáo viên và học sinh từ tiểu học đến THPT" />
<meta property="og:url" content="https://toan123.vn/" />
<meta property="og:site_name" content="toan123" />
<meta property="og:updated_time" content="2025-08-20T18:25:28+07:00" />
<meta property="og:image" content="https://toan123.vn/wp-content/uploads/2025/03/default-thumbnail.jpg" />
<meta property="og:image:secure_url" content="https://toan123.vn/wp-content/uploads/2025/03/default-thumbnail.jpg" />
<meta property="og:image:width" content="640" />
<meta property="og:image:height" content="480" />
<meta property="og:image:alt" content="Trang chủ" />
<meta property="og:image:type" content="image/jpeg" />
<meta property="article:published_time" content="2025-02-28T14:56:03+07:00" />
<meta property="article:modified_time" content="2025-08-20T18:25:28+07:00" />
<meta name="twitter:card" content="summary_large_image" />
<meta name="twitter:title" content="Cộng đồng toán học - Toan123.vn" />
<meta name="twitter:description" content="Toan123 VN là cộng động những người yêu toán học Là nơi chia sẻ kiến thức, tài liệu học tập cho giáo viên và học sinh từ tiểu học đến THPT" />
<meta name="twitter:image" content="https://toan123.vn/wp-content/uploads/2025/03/default-thumbnail.jpg" />
<meta name="twitter:label1" content="Được viết bởi" />
<meta name="twitter:data1" content="admin" />
<meta name="twitter:label2" content="Thời gian để đọc" />
<meta name="twitter:data2" content="Chưa đến một phút" />
<script type="application/ld+json" class="rank-math-schema">{"@context":"https://schema.org","@graph":[{"@type":["Person","Organization"],"@id":"https://toan123.vn/#person","name":"toan123"},{"@type":"WebSite","@id":"https://toan123.vn/#website","url":"https://toan123.vn","name":"toan123","publisher":{"@id":"https://toan123.vn/#person"},"inLanguage":"vi","potentialAction":{"@type":"SearchAction","target":"https://toan123.vn/?s={search_term_string}","query-input":"required name=search_term_string"}},{"@type":"ImageObject","@id":"https://toan123.vn/wp-content/uploads/2025/03/default-thumbnail.jpg","url":"https://toan123.vn/wp-content/uploads/2025/03/default-thumbnail.jpg","width":"640","height":"480","inLanguage":"vi"},{"@type":"WebPage","@id":"https://toan123.vn/#webpage","url":"https://toan123.vn/","name":"C\u1ed9ng \u0111\u1ed3ng to\u00e1n h\u1ecdc - Toan123.vn","datePublished":"2025-02-28T14:56:03+07:00","dateModified":"2025-08-20T18:25:28+07:00","about":{"@id":"https://toan123.vn/#person"},"isPartOf":{"@id":"https://toan123.vn/#website"},"primaryImageOfPage":{"@id":"https://toan123.vn/wp-content/uploads/2025/03/default-thumbnail.jpg"},"inLanguage":"vi"},{"@type":"Person","@id":"https://toan123.vn/author/admin/","name":"admin","url":"https://toan123.vn/author/admin/","image":{"@type":"ImageObject","@id":"https://secure.gravatar.com/avatar/514ffe5d1ecdb90a9d11e5a0a9d64577d48f3a08544a93f3e1b3cac159da02f3?s=96&d=mm&r=g","url":"https://secure.gravatar.com/avatar/514ffe5d1ecdb90a9d11e5a0a9d64577d48f3a08544a93f3e1b3cac159da02f3?s=96&d=mm&r=g","caption":"admin","inLanguage":"vi"},"sameAs":["https://toan123.vn"]},{"@type":"Article","headline":"C\u1ed9ng \u0111\u1ed3ng to\u00e1n h\u1ecdc - Toan123.vn","datePublished":"2025-02-28T14:56:03+07:00","dateModified":"2025-08-20T18:25:28+07:00","author":{"@id":"https://toan123.vn/author/admin/","name":"admin"},"publisher":{"@id":"https://toan123.vn/#person"},"description":"Toan123 VN l\u00e0 c\u1ed9ng \u0111\u1ed9ng nh\u1eefng ng\u01b0\u1eddi y\u00eau to\u00e1n h\u1ecdc L\u00e0 n\u01a1i chia s\u1ebb ki\u1ebfn th\u1ee9c, t\u00e0i li\u1ec7u h\u1ecdc t\u1eadp cho gi\u00e1o vi\u00ean v\u00e0 h\u1ecdc sinh t\u1eeb ti\u1ec3u h\u1ecdc \u0111\u1ebfn THPT","name":"C\u1ed9ng \u0111\u1ed3ng to\u00e1n h\u1ecdc - Toan123.vn","@id":"https://toan123.vn/#richSnippet","isPartOf":{"@id":"https://toan123.vn/#webpage"},"image":{"@id":"https://toan123.vn/wp-content/uploads/2025/03/default-thumbnail.jpg"},"inLanguage":"vi","mainEntityOfPage":{"@id":"https://toan123.vn/#webpage"}}]}</script>


<link rel='prefetch' href='https://toan123.vn/wp-content/themes/flatsome/assets/js/flatsome.js?ver=8e60d746741250b4dd4e' />
<link rel='prefetch' href='https://toan123.vn/wp-content/themes/flatsome/assets/js/chunk.slider.js?ver=3.19.7' />
<link rel='prefetch' href='https://toan123.vn/wp-content/themes/flatsome/assets/js/chunk.popups.js?ver=3.19.7' />
<link rel='prefetch' href='https://toan123.vn/wp-content/themes/flatsome/assets/js/chunk.tooltips.js?ver=3.19.7' />
<link rel="alternate" type="application/rss+xml" title="Dòng thông tin Cộng đồng toán học - Toan123.vn »" href="https://toan123.vn/feed/" />
<link rel="alternate" type="application/rss+xml" title="Cộng đồng toán học - Toan123.vn » Dòng bình luận" href="https://toan123.vn/comments/feed/" />
<script type="text/javascript">
/* <![CDATA[ */
window._wpemojiSettings = {"baseUrl":"https:\/\/s.w.org\/images\/core\/emoji\/16.0.1\/72x72\/","ext":".png","svgUrl":"https:\/\/s.w.org\/images\/core\/emoji\/16.0.1\/svg\/","svgExt":".svg","source":{"concatemoji":"https:\/\/toan123.vn\/wp-includes\/js\/wp-emoji-release.min.js?ver=6.8.2"}};
/*! This file is auto-generated */
!function(s,n){var o,i,e;function c(e){try{var t={supportTests:e,timestamp:(new Date).valueOf()};sessionStorage.setItem(o,JSON.stringify(t))}catch(e){}}function p(e,t,n){e.clearRect(0,0,e.canvas.width,e.canvas.height),e.fillText(t,0,0);var t=new Uint32Array(e.getImageData(0,0,e.canvas.width,e.canvas.height).data),a=(e.clearRect(0,0,e.canvas.width,e.canvas.height),e.fillText(n,0,0),new Uint32Array(e.getImageData(0,0,e.canvas.width,e.canvas.height).data));return t.every(function(e,t){return e===a[t]})}function u(e,t){e.clearRect(0,0,e.canvas.width,e.canvas.height),e.fillText(t,0,0);for(var n=e.getImageData(16,16,1,1),a=0;a<n.data.length;a++)if(0!==n.data[a])return!1;return!0}function f(e,t,n,a){switch(t){case"flag":return n(e,"\ud83c\udff3\ufe0f\u200d\u26a7\ufe0f","\ud83c\udff3\ufe0f\u200b\u26a7\ufe0f")?!1:!n(e,"\ud83c\udde8\ud83c\uddf6","\ud83c\udde8\u200b\ud83c\uddf6")&&!n(e,"\ud83c\udff4\udb40\udc67\udb40\udc62\udb40\udc65\udb40\udc6e\udb40\udc67\udb40\udc7f","\ud83c\udff4\u200b\udb40\udc67\u200b\udb40\udc62\u200b\udb40\udc65\u200b\udb40\udc6e\u200b\udb40\udc67\u200b\udb40\udc7f");case"emoji":return!a(e,"\ud83e\udedf")}return!1}function g(e,t,n,a){var r="undefined"!=typeof WorkerGlobalScope&&self instanceof WorkerGlobalScope?new OffscreenCanvas(300,150):s.createElement("canvas"),o=r.getContext("2d",{willReadFrequently:!0}),i=(o.textBaseline="top",o.font="600 32px Arial",{});return e.forEach(function(e){i[e]=t(o,e,n,a)}),i}function t(e){var t=s.createElement("script");t.src=e,t.defer=!0,s.head.appendChild(t)}"undefined"!=typeof Promise&&(o="wpEmojiSettingsSupports",i=["flag","emoji"],n.supports={everything:!0,everythingExceptFlag:!0},e=new Promise(function(e){s.addEventListener("DOMContentLoaded",e,{once:!0})}),new Promise(function(t){var n=function(){try{var e=JSON.parse(sessionStorage.getItem(o));if("object"==typeof e&&"number"==typeof e.timestamp&&(new Date).valueOf()<e.timestamp+604800&&"object"==typeof e.supportTests)return e.supportTests}catch(e){}return null}();if(!n){if("undefined"!=typeof Worker&&"undefined"!=typeof OffscreenCanvas&&"undefined"!=typeof URL&&URL.createObjectURL&&"undefined"!=typeof Blob)try{var e="postMessage("+g.toString()+"("+[JSON.stringify(i),f.toString(),p.toString(),u.toString()].join(",")+"));",a=new Blob([e],{type:"text/javascript"}),r=new Worker(URL.createObjectURL(a),{name:"wpTestEmojiSupports"});return void(r.onmessage=function(e){c(n=e.data),r.terminate(),t(n)})}catch(e){}c(n=g(i,f,p,u))}t(n)}).then(function(e){for(var t in e)n.supports[t]=e[t],n.supports.everything=n.supports.everything&&n.supports[t],"flag"!==t&&(n.supports.everythingExceptFlag=n.supports.everythingExceptFlag&&n.supports[t]);n.supports.everythingExceptFlag=n.supports.everythingExceptFlag&&!n.supports.flag,n.DOMReady=!1,n.readyCallback=function(){n.DOMReady=!0}}).then(function(){return e}).then(function(){var e;n.supports.everything||(n.readyCallback(),(e=n.source||{}).concatemoji?t(e.concatemoji):e.wpemoji&&e.twemoji&&(t(e.twemoji),t(e.wpemoji)))}))}((window,document),window._wpemojiSettings);
/* ]]> */
</script>

<style id='wp-emoji-styles-inline-css' type='text/css'>

img.wp-smiley, img.emoji {
display: inline !important;
border: none !important;
box-shadow: none !important;
height: 1em !important;
width: 1em !important;
margin: 0 0.07em !important;
vertical-align: -0.1em !important;
background: none !important;
padding: 0 !important;
}
</style>
<style id='wp-block-library-inline-css' type='text/css'>
:root{--wp-admin-theme-color:#007cba;--wp-admin-theme-color--rgb:0,124,186;--wp-admin-theme-color-darker-10:#006ba1;--wp-admin-theme-color-darker-10--rgb:0,107,161;--wp-admin-theme-color-darker-20:#005a87;--wp-admin-theme-color-darker-20--rgb:0,90,135;--wp-admin-border-width-focus:2px;--wp-block-synced-color:#7a00df;--wp-block-synced-color--rgb:122,0,223;--wp-bound-block-color:var(--wp-block-synced-color)}@media (min-resolution:192dpi){:root{--wp-admin-border-width-focus:1.5px}}.wp-element-button{cursor:pointer}:root{--wp--preset--font-size--normal:16px;--wp--preset--font-size--huge:42px}:root .has-very-light-gray-background-color{background-color:#eee}:root .has-very-dark-gray-background-color{background-color:#313131}:root .has-very-light-gray-color{color:#eee}:root .has-very-dark-gray-color{color:#313131}:root .has-vivid-green-cyan-to-vivid-cyan-blue-gradient-background{background:linear-gradient(135deg,#00d084,#0693e3)}:root .has-purple-crush-gradient-background{background:linear-gradient(135deg,#34e2e4,#4721fb 50%,#ab1dfe)}:root .has-hazy-dawn-gradient-background{background:linear-gradient(135deg,#faaca8,#dad0ec)}:root .has-subdued-olive-gradient-background{background:linear-gradient(135deg,#fafae1,#67a671)}:root .has-atomic-cream-gradient-background{background:linear-gradient(135deg,#fdd79a,#004a59)}:root .has-nightshade-gradient-background{background:linear-gradient(135deg,#330968,#31cdcf)}:root .has-midnight-gradient-background{background:linear-gradient(135deg,#020381,#2874fc)}.has-regular-font-size{font-size:1em}.has-larger-font-size{font-size:2.625em}.has-normal-font-size{font-size:var(--wp--preset--font-size--normal)}.has-huge-font-size{font-size:var(--wp--preset--font-size--huge)}.has-text-align-center{text-align:center}.has-text-align-left{text-align:left}.has-text-align-right{text-align:right}#end-resizable-editor-section{display:none}.aligncenter{clear:both}.items-justified-left{justify-content:flex-start}.items-justified-center{justify-content:center}.items-justified-right{justify-content:flex-end}.items-justified-space-between{justify-content:space-between}.screen-reader-text{border:0;clip-path:inset(50%);height:1px;margin:-1px;overflow:hidden;padding:0;position:absolute;width:1px;word-wrap:normal!important}.screen-reader-text:focus{background-color:#ddd;clip-path:none;color:#444;display:block;font-size:1em;height:auto;left:5px;line-height:normal;padding:15px 23px 14px;text-decoration:none;top:5px;width:auto;z-index:100000}html :where(.has-border-color){border-style:solid}html :where([style*=border-top-color]){border-top-style:solid}html :where([style*=border-right-color]){border-right-style:solid}html :where([style*=border-bottom-color]){border-bottom-style:solid}html :where([style*=border-left-color]){border-left-style:solid}html :where([style*=border-width]){border-style:solid}html :where([style*=border-top-width]){border-top-style:solid}html :where([style*=border-right-width]){border-right-style:solid}html :where([style*=border-bottom-width]){border-bottom-style:solid}html :where([style*=border-left-width]){border-left-style:solid}html :where(img[class*=wp-image-]){height:auto;max-width:100%}:where(figure){margin:0 0 1em}html :where(.is-position-sticky){--wp-admin--admin-bar--position-offset:var(--wp-admin--admin-bar--height,0px)}@media screen and (max-width:600px){html :where(.is-position-sticky){--wp-admin--admin-bar--position-offset:0px}}
</style>
<link rel='stylesheet' id='flatsome-main-css' href='https://toan123.vn/wp-content/themes/flatsome/assets/css/flatsome.css?ver=3.19.7' type='text/css' media='all' />
<style id='flatsome-main-inline-css' type='text/css'>
@font-face {
font-family: "fl-icons";
font-display: block;
src: url(https://toan123.vn/wp-content/themes/flatsome/assets/css/icons/fl-icons.eot?v=3.19.7);
src:
url(https://toan123.vn/wp-content/themes/flatsome/assets/css/icons/fl-icons.eot#iefix?v=3.19.7) format("embedded-opentype"),
url(https://toan123.vn/wp-content/themes/flatsome/assets/css/icons/fl-icons.woff2?v=3.19.7) format("woff2"),
url(https://toan123.vn/wp-content/themes/flatsome/assets/css/icons/fl-icons.ttf?v=3.19.7) format("truetype"),
url(https://toan123.vn/wp-content/themes/flatsome/assets/css/icons/fl-icons.woff?v=3.19.7) format("woff"),
url(https://toan123.vn/wp-content/themes/flatsome/assets/css/icons/fl-icons.svg?v=3.19.7#fl-icons) format("svg");
}
</style>
<link rel='stylesheet' id='flatsome-style-css' href='https://toan123.vn/wp-content/themes/flatsome-child/style.css?ver=3.0' type='text/css' media='all' />
<script type="text/javascript" src="https://toan123.vn/wp-includes/js/jquery/jquery.min.js?ver=3.7.1" id="jquery-core-js"></script>
<script type="text/javascript" src="https://toan123.vn/wp-includes/js/jquery/jquery-migrate.min.js?ver=3.4.1" id="jquery-migrate-js"></script>
<link rel="https://api.w.org/" href="https://toan123.vn/wp-json/" /><link rel="alternate" title="JSON" type="application/json" href="https://toan123.vn/wp-json/wp/v2/pages/21" /><link rel="EditURI" type="application/rsd+xml" title="RSD" href="https://toan123.vn/xmlrpc.php?rsd" />
<meta name="generator" content="WordPress 6.8.2" />
<link rel='shortlink' href='https://toan123.vn/' />
<link rel="alternate" title="oNhúng (JSON)" type="application/json+oembed" href="https://toan123.vn/wp-json/oembed/1.0/embed?url=https%3A%2F%2Ftoan123.vn%2F" />
<link rel="alternate" title="oNhúng (XML)" type="text/xml+oembed" href="https://toan123.vn/wp-json/oembed/1.0/embed?url=https%3A%2F%2Ftoan123.vn%2F&format=xml" />
<script>
window.MathJax = {
tex: {
inlineMath: [['(', ')']],
displayMath: [['\[', '\]']],
processEscapes: true
},
options: {
trust: true,
linebreaks: { automatic: true }
}
};
</script>
<script type="text/javascript" async
src="https://cdnjs.cloudflare.com/ajax/libs/mathjax/3.2.2/es5/tex-mml-chtml.js">
</script>

<meta name="google-site-verification" content="f2V1wnnGzr94C87ucs1zFfqH4XVYUFARqS4cq6xfdCI" />

<link rel="icon" href="https://toan123.vn/wp-content/uploads/2025/03/cropped-logo-32x32.png" sizes="32x32" />
<link rel="icon" href="https://toan123.vn/wp-content/uploads/2025/03/cropped-logo-192x192.png" sizes="192x192" />
<link rel="apple-touch-icon" href="https://toan123.vn/wp-content/uploads/2025/03/cropped-logo-180x180.png" />
<meta name="msapplication-TileImage" content="https://toan123.vn/wp-content/uploads/2025/03/cropped-logo-270x270.png" />
<style id="custom-css" type="text/css">:root {--primary-color: #136adc;--fs-color-primary: #136adc;--fs-color-secondary: #fe6e6a;--fs-color-success: #7a9c59;--fs-color-alert: #b20000;--fs-experimental-link-color: #334862;--fs-experimental-link-color-hover: #111;}.tooltipster-base {--tooltip-color: #fff;--tooltip-bg-color: #000;}.off-canvas-right .mfp-content, .off-canvas-left .mfp-content {--drawer-width: 300px;}.container-width, .full-width .ubermenu-nav, .container, .row{max-width: 1120px}.row.row-collapse{max-width: 1090px}.row.row-small{max-width: 1112.5px}.row.row-large{max-width: 1150px}.header-main{height: 90px}#logo img{max-height: 90px}#logo{width:200px;}.header-top{min-height: 30px}.transparent .header-main{height: 90px}.transparent #logo img{max-height: 90px}.has-transparent + .page-title:first-of-type,.has-transparent + #main > .page-title,.has-transparent + #main > div > .page-title,.has-transparent + #main .page-header-wrapper:first-of-type .page-title{padding-top: 120px;}.header.show-on-scroll,.stuck .header-main{height:70px!important}.stuck #logo img{max-height: 70px!important}.header-bg-color {background-color: #ffffff}.header-bottom {background-color: #f1f1f1}.header-main .nav > li > a{line-height: 16px }.stuck .header-main .nav > li > a{line-height: 50px }@media (max-width: 549px) {.header-main{height: 70px}#logo img{max-height: 70px}}body{color: #303030}h1,h2,h3,h4,h5,h6,.heading-font{color: #303030;}body{font-size: 100%;}@media screen and (max-width: 549px){body{font-size: 100%;}}body{font-family: Roboto, sans-serif;}body {font-weight: 400;font-style: normal;}.nav > li > a {font-family: Roboto, sans-serif;}.mobile-sidebar-levels-2 .nav > li > ul > li > a {font-family: Roboto, sans-serif;}.nav > li > a,.mobile-sidebar-levels-2 .nav > li > ul > li > a {font-weight: 400;font-style: normal;}h1,h2,h3,h4,h5,h6,.heading-font, .off-canvas-center .nav-sidebar.nav-vertical > li > a{font-family: Roboto, sans-serif;}h1,h2,h3,h4,h5,h6,.heading-font,.banner h1,.banner h2 {font-weight: 500;font-style: normal;}.alt-font{font-family: "Dancing Script", sans-serif;}.alt-font {font-weight: 400!important;font-style: normal!important;}.breadcrumbs{text-transform: none;}button,.button{text-transform: none;}.nav > li > a, .links > li > a{text-transform: none;}.section-title span{text-transform: none;}h3.widget-title,span.widget-title{text-transform: none;}.header:not(.transparent) .header-nav-main.nav > li > a {color: #353535;}.header:not(.transparent) .header-nav-main.nav > li > a:hover,.header:not(.transparent) .header-nav-main.nav > li.active > a,.header:not(.transparent) .header-nav-main.nav > li.current > a,.header:not(.transparent) .header-nav-main.nav > li > a.active,.header:not(.transparent) .header-nav-main.nav > li > a.current{color: #fe6e6a;}.header-nav-main.nav-line-bottom > li > a:before,.header-nav-main.nav-line-grow > li > a:before,.header-nav-main.nav-line > li > a:before,.header-nav-main.nav-box > li > a:hover,.header-nav-main.nav-box > li.active > a,.header-nav-main.nav-pills > li > a:hover,.header-nav-main.nav-pills > li.active > a{color:#FFF!important;background-color: #fe6e6a;}.nav-vertical-fly-out > li + li {border-top-width: 1px; border-top-style: solid;}.label-new.menu-item > a:after{content:"Mới";}.label-hot.menu-item > a:after{content:"Nổi bật";}.label-sale.menu-item > a:after{content:"Giảm giá";}.label-popular.menu-item > a:after{content:"Phổ biến";}</style> <style type="text/css" id="wp-custom-css">
.absolute-footer.dark{
display:none
}
.box-blog-post .is-divider{
display:none
}
b, strong{
font-weight:500!important;
}
/*trang bai viet*/
.xem-them .tieu-de-xem-them {
font-weight: 500;
display: block;
margin-bottom: 10px;
font-size: 16px;
color: #333;
}
.xem-them ul li {
margin-bottom: 5px;
}
.xem-them ul li a {
font-weight: 400;
font-size: 16px;
color: #333;
}
.xem-them ul li a:hover {
text-decoration: underline;
}

.blog-single .entry-meta {
text-transform: none;
font-size: 14px;
letter-spacing: 0;
color: gray;
border-top: 1px solid #e2e2e2;
border-bottom: 1px solid #e2e2e2;
padding: 10px;
background: #f9f9f9;
}
.danh-muc {
margin-bottom: 15px;
}
.danh-muc span.title, .the-tim-kiem span.title {
border-radius: 4px;
background: var(--primary-color);
padding: 4px 10px;
color: white;
margin-right: 5px;
}
.danh-muc a, .the-tim-kiem a {line-height:32px;
border-radius: 4px;
margin-bottom: 10px;
padding: 4px 10px;
background: #dedede;
color: #464646;
}
.danh-muc a:hover, .the-tim-kiem a:hover {
background: #1fc1cb;
color: white;
}
.bai-viet-lien-quan {
margin-top: 15px;
}
.bai-viet-lien-quan ul {
margin-top: 10px;
display: flex
;
width: 100%;
justify-content: space-between;
gap: 0px;
flex-wrap: wrap;
}
.bai-viet-lien-quan ul li {
list-style: none;
width: 32%;
}
.bai-viet-lien-quan ul li .box-image img {
border-radius: 4px;
object-fit: cover;
object-position: center;
}
.bai-viet-lien-quan h4 {
font-weight:400;
font-size: 15px;
color: #333;
line-height: 19px;
padding-top: 7px;
height: 64px;
overflow: hidden;
}
.nav-pagination>li>a, .nav-pagination>li>span{
border:0px
}
.off-canvas .nav-vertical>li>a{
font-size:16px;
color:#222
} </style>
<style id="kirki-inline-styles">/* cyrillic-ext */
@font-face {
font-family: 'Roboto';
font-style: normal;
font-weight: 400;
font-stretch: 100%;
font-display: swap;
src: url(https://toan123.vn/wp-content/fonts/roboto/KFO7CnqEu92Fr1ME7kSn66aGLdTylUAMa3GUBGEe.woff2) format('woff2');
unicode-range: U+0460-052F, U+1C80-1C8A, U+20B4, U+2DE0-2DFF, U+A640-A69F, U+FE2E-FE2F;
}
/* cyrillic */
@font-face {
font-family: 'Roboto';
font-style: normal;
font-weight: 400;
font-stretch: 100%;
font-display: swap;
src: url(https://toan123.vn/wp-content/fonts/roboto/KFO7CnqEu92Fr1ME7kSn66aGLdTylUAMa3iUBGEe.woff2) format('woff2');
unicode-range: U+0301, U+0400-045F, U+0490-0491, U+04B0-04B1, U+2116;
}
/* greek-ext */
@font-face {
font-family: 'Roboto';
font-style: normal;
font-weight: 400;
font-stretch: 100%;
font-display: swap;
src: url(https://toan123.vn/wp-content/fonts/roboto/KFO7CnqEu92Fr1ME7kSn66aGLdTylUAMa3CUBGEe.woff2) format('woff2');
unicode-range: U+1F00-1FFF;
}
/* greek */
@font-face {
font-family: 'Roboto';
font-style: normal;
font-weight: 400;
font-stretch: 100%;
font-display: swap;
src: url(https://toan123.vn/wp-content/fonts/roboto/KFO7CnqEu92Fr1ME7kSn66aGLdTylUAMa3-UBGEe.woff2) format('woff2');
unicode-range: U+0370-0377, U+037A-037F, U+0384-038A, U+038C, U+038E-03A1, U+03A3-03FF;
}
/* math */
@font-face {
font-family: 'Roboto';
font-style: normal;
font-weight: 400;
font-stretch: 100%;
font-display: swap;
src: url(https://toan123.vn/wp-content/fonts/roboto/KFO7CnqEu92Fr1ME7kSn66aGLdTylUAMawCUBGEe.woff2) format('woff2');
unicode-range: U+0302-0303, U+0305, U+0307-0308, U+0310, U+0312, U+0315, U+031A, U+0326-0327, U+032C, U+032F-0330, U+0332-0333, U+0338, U+033A, U+0346, U+034D, U+0391-03A1, U+03A3-03A9, U+03B1-03C9, U+03D1, U+03D5-03D6, U+03F0-03F1, U+03F4-03F5, U+2016-2017, U+2034-2038, U+203C, U+2040, U+2043, U+2047, U+2050, U+2057, U+205F, U+2070-2071, U+2074-208E, U+2090-209C, U+20D0-20DC, U+20E1, U+20E5-20EF, U+2100-2112, U+2114-2115, U+2117-2121, U+2123-214F, U+2190, U+2192, U+2194-21AE, U+21B0-21E5, U+21F1-21F2, U+21F4-2211, U+2213-2214, U+2216-22FF, U+2308-230B, U+2310, U+2319, U+231C-2321, U+2336-237A, U+237C, U+2395, U+239B-23B7, U+23D0, U+23DC-23E1, U+2474-2475, U+25AF, U+25B3, U+25B7, U+25BD, U+25C1, U+25CA, U+25CC, U+25FB, U+266D-266F, U+27C0-27FF, U+2900-2AFF, U+2B0E-2B11, U+2B30-2B4C, U+2BFE, U+3030, U+FF5B, U+FF5D, U+1D400-1D7FF, U+1EE00-1EEFF;
}
/* symbols */
@font-face {
font-family: 'Roboto';
font-style: normal;
font-weight: 400;
font-stretch: 100%;
font-display: swap;
src: url(https://toan123.vn/wp-content/fonts/roboto/KFO7CnqEu92Fr1ME7kSn66aGLdTylUAMaxKUBGEe.woff2) format('woff2');
unicode-range: U+0001-000C, U+000E-001F, U+007F-009F, U+20DD-20E0, U+20E2-20E4, U+2150-218F, U+2190, U+2192, U+2194-2199, U+21AF, U+21E6-21F0, U+21F3, U+2218-2219, U+2299, U+22C4-22C6, U+2300-243F, U+2440-244A, U+2460-24FF, U+25A0-27BF, U+2800-28FF, U+2921-2922, U+2981, U+29BF, U+29EB, U+2B00-2BFF, U+4DC0-4DFF, U+FFF9-FFFB, U+10140-1018E, U+10190-1019C, U+101A0, U+101D0-101FD, U+102E0-102FB, U+10E60-10E7E, U+1D2C0-1D2D3, U+1D2E0-1D37F, U+1F000-1F0FF, U+1F100-1F1AD, U+1F1E6-1F1FF, U+1F30D-1F30F, U+1F315, U+1F31C, U+1F31E, U+1F320-1F32C, U+1F336, U+1F378, U+1F37D, U+1F382, U+1F393-1F39F, U+1F3A7-1F3A8, U+1F3AC-1F3AF, U+1F3C2, U+1F3C4-1F3C6, U+1F3CA-1F3CE, U+1F3D4-1F3E0, U+1F3ED, U+1F3F1-1F3F3, U+1F3F5-1F3F7, U+1F408, U+1F415, U+1F41F, U+1F426, U+1F43F, U+1F441-1F442, U+1F444, U+1F446-1F449, U+1F44C-1F44E, U+1F453, U+1F46A, U+1F47D, U+1F4A3, U+1F4B0, U+1F4B3, U+1F4B9, U+1F4BB, U+1F4BF, U+1F4C8-1F4CB, U+1F4D6, U+1F4DA, U+1F4DF, U+1F4E3-1F4E6, U+1F4EA-1F4ED, U+1F4F7, U+1F4F9-1F4FB, U+1F4FD-1F4FE, U+1F503, U+1F507-1F50B, U+1F50D, U+1F512-1F513, U+1F53E-1F54A, U+1F54F-1F5FA, U+1F610, U+1F650-1F67F, U+1F687, U+1F68D, U+1F691, U+1F694, U+1F698, U+1F6AD, U+1F6B2, U+1F6B9-1F6BA, U+1F6BC, U+1F6C6-1F6CF, U+1F6D3-1F6D7, U+1F6E0-1F6EA, U+1F6F0-1F6F3, U+1F6F7-1F6FC, U+1F700-1F7FF, U+1F800-1F80B, U+1F810-1F847, U+1F850-1F859, U+1F860-1F887, U+1F890-1F8AD, U+1F8B0-1F8BB, U+1F8C0-1F8C1, U+1F900-1F90B, U+1F93B, U+1F946, U+1F984, U+1F996, U+1F9E9, U+1FA00-1FA6F, U+1FA70-1FA7C, U+1FA80-1FA89, U+1FA8F-1FAC6, U+1FACE-1FADC, U+1FADF-1FAE9, U+1FAF0-1FAF8, U+1FB00-1FBFF;
}
/* vietnamese */
@font-face {
font-family: 'Roboto';
font-style: normal;
font-weight: 400;
font-stretch: 100%;
font-display: swap;
src: url(https://toan123.vn/wp-content/fonts/roboto/KFO7CnqEu92Fr1ME7kSn66aGLdTylUAMa3OUBGEe.woff2) format('woff2');
unicode-range: U+0102-0103, U+0110-0111, U+0128-0129, U+0168-0169, U+01A0-01A1, U+01AF-01B0, U+0300-0301, U+0303-0304, U+0308-0309, U+0323, U+0329, U+1EA0-1EF9, U+20AB;
}
/* latin-ext */
@font-face {
font-family: 'Roboto';
font-style: normal;
font-weight: 400;
font-stretch: 100%;
font-display: swap;
src: url(https://toan123.vn/wp-content/fonts/roboto/KFO7CnqEu92Fr1ME7kSn66aGLdTylUAMa3KUBGEe.woff2) format('woff2');
unicode-range: U+0100-02BA, U+02BD-02C5, U+02C7-02CC, U+02CE-02D7, U+02DD-02FF, U+0304, U+0308, U+0329, U+1D00-1DBF, U+1E00-1E9F, U+1EF2-1EFF, U+2020, U+20A0-20AB, U+20AD-20C0, U+2113, U+2C60-2C7F, U+A720-A7FF;
}
/* latin */
@font-face {
font-family: 'Roboto';
font-style: normal;
font-weight: 400;
font-stretch: 100%;
font-display: swap;
src: url(https://toan123.vn/wp-content/fonts/roboto/KFO7CnqEu92Fr1ME7kSn66aGLdTylUAMa3yUBA.woff2) format('woff2');
unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}
/* cyrillic-ext */
@font-face {
font-family: 'Roboto';
font-style: normal;
font-weight: 500;
font-stretch: 100%;
font-display: swap;
src: url(https://toan123.vn/wp-content/fonts/roboto/KFO7CnqEu92Fr1ME7kSn66aGLdTylUAMa3GUBGEe.woff2) format('woff2');
unicode-range: U+0460-052F, U+1C80-1C8A, U+20B4, U+2DE0-2DFF, U+A640-A69F, U+FE2E-FE2F;
}
/* cyrillic */
@font-face {
font-family: 'Roboto';
font-style: normal;
font-weight: 500;
font-stretch: 100%;
font-display: swap;
src: url(https://toan123.vn/wp-content/fonts/roboto/KFO7CnqEu92Fr1ME7kSn66aGLdTylUAMa3iUBGEe.woff2) format('woff2');
unicode-range: U+0301, U+0400-045F, U+0490-0491, U+04B0-04B1, U+2116;
}
/* greek-ext */
@font-face {
font-family: 'Roboto';
font-style: normal;
font-weight: 500;
font-stretch: 100%;
font-display: swap;
src: url(https://toan123.vn/wp-content/fonts/roboto/KFO7CnqEu92Fr1ME7kSn66aGLdTylUAMa3CUBGEe.woff2) format('woff2');
unicode-range: U+1F00-1FFF;
}
/* greek */
@font-face {
font-family: 'Roboto';
font-style: normal;
font-weight: 500;
font-stretch: 100%;
font-display: swap;
src: url(https://toan123.vn/wp-content/fonts/roboto/KFO7CnqEu92Fr1ME7kSn66aGLdTylUAMa3-UBGEe.woff2) format('woff2');
unicode-range: U+0370-0377, U+037A-037F, U+0384-038A, U+038C, U+038E-03A1, U+03A3-03FF;
}
/* math */
@font-face {
font-family: 'Roboto';
font-style: normal;
font-weight: 500;
font-stretch: 100%;
font-display: swap;
src: url(https://toan123.vn/wp-content/fonts/roboto/KFO7CnqEu92Fr1ME7kSn66aGLdTylUAMawCUBGEe.woff2) format('woff2');
unicode-range: U+0302-0303, U+0305, U+0307-0308, U+0310, U+0312, U+0315, U+031A, U+0326-0327, U+032C, U+032F-0330, U+0332-0333, U+0338, U+033A, U+0346, U+034D, U+0391-03A1, U+03A3-03A9, U+03B1-03C9, U+03D1, U+03D5-03D6, U+03F0-03F1, U+03F4-03F5, U+2016-2017, U+2034-2038, U+203C, U+2040, U+2043, U+2047, U+2050, U+2057, U+205F, U+2070-2071, U+2074-208E, U+2090-209C, U+20D0-20DC, U+20E1, U+20E5-20EF, U+2100-2112, U+2114-2115, U+2117-2121, U+2123-214F, U+2190, U+2192, U+2194-21AE, U+21B0-21E5, U+21F1-21F2, U+21F4-2211, U+2213-2214, U+2216-22FF, U+2308-230B, U+2310, U+2319, U+231C-2321, U+2336-237A, U+237C, U+2395, U+239B-23B7, U+23D0, U+23DC-23E1, U+2474-2475, U+25AF, U+25B3, U+25B7, U+25BD, U+25C1, U+25CA, U+25CC, U+25FB, U+266D-266F, U+27C0-27FF, U+2900-2AFF, U+2B0E-2B11, U+2B30-2B4C, U+2BFE, U+3030, U+FF5B, U+FF5D, U+1D400-1D7FF, U+1EE00-1EEFF;
}
/* symbols */
@font-face {
font-family: 'Roboto';
font-style: normal;
font-weight: 500;
font-stretch: 100%;
font-display: swap;
src: url(https://toan123.vn/wp-content/fonts/roboto/KFO7CnqEu92Fr1ME7kSn66aGLdTylUAMaxKUBGEe.woff2) format('woff2');
unicode-range: U+0001-000C, U+000E-001F, U+007F-009F, U+20DD-20E0, U+20E2-20E4, U+2150-218F, U+2190, U+2192, U+2194-2199, U+21AF, U+21E6-21F0, U+21F3, U+2218-2219, U+2299, U+22C4-22C6, U+2300-243F, U+2440-244A, U+2460-24FF, U+25A0-27BF, U+2800-28FF, U+2921-2922, U+2981, U+29BF, U+29EB, U+2B00-2BFF, U+4DC0-4DFF, U+FFF9-FFFB, U+10140-1018E, U+10190-1019C, U+101A0, U+101D0-101FD, U+102E0-102FB, U+10E60-10E7E, U+1D2C0-1D2D3, U+1D2E0-1D37F, U+1F000-1F0FF, U+1F100-1F1AD, U+1F1E6-1F1FF, U+1F30D-1F30F, U+1F315, U+1F31C, U+1F31E, U+1F320-1F32C, U+1F336, U+1F378, U+1F37D, U+1F382, U+1F393-1F39F, U+1F3A7-1F3A8, U+1F3AC-1F3AF, U+1F3C2, U+1F3C4-1F3C6, U+1F3CA-1F3CE, U+1F3D4-1F3E0, U+1F3ED, U+1F3F1-1F3F3, U+1F3F5-1F3F7, U+1F408, U+1F415, U+1F41F, U+1F426, U+1F43F, U+1F441-1F442, U+1F444, U+1F446-1F449, U+1F44C-1F44E, U+1F453, U+1F46A, U+1F47D, U+1F4A3, U+1F4B0, U+1F4B3, U+1F4B9, U+1F4BB, U+1F4BF, U+1F4C8-1F4CB, U+1F4D6, U+1F4DA, U+1F4DF, U+1F4E3-1F4E6, U+1F4EA-1F4ED, U+1F4F7, U+1F4F9-1F4FB, U+1F4FD-1F4FE, U+1F503, U+1F507-1F50B, U+1F50D, U+1F512-1F513, U+1F53E-1F54A, U+1F54F-1F5FA, U+1F610, U+1F650-1F67F, U+1F687, U+1F68D, U+1F691, U+1F694, U+1F698, U+1F6AD, U+1F6B2, U+1F6B9-1F6BA, U+1F6BC, U+1F6C6-1F6CF, U+1F6D3-1F6D7, U+1F6E0-1F6EA, U+1F6F0-1F6F3, U+1F6F7-1F6FC, U+1F700-1F7FF, U+1F800-1F80B, U+1F810-1F847, U+1F850-1F859, U+1F860-1F887, U+1F890-1F8AD, U+1F8B0-1F8BB, U+1F8C0-1F8C1, U+1F900-1F90B, U+1F93B, U+1F946, U+1F984, U+1F996, U+1F9E9, U+1FA00-1FA6F, U+1FA70-1FA7C, U+1FA80-1FA89, U+1FA8F-1FAC6, U+1FACE-1FADC, U+1FADF-1FAE9, U+1FAF0-1FAF8, U+1FB00-1FBFF;
}
/* vietnamese */
@font-face {
font-family: 'Roboto';
font-style: normal;
font-weight: 500;
font-stretch: 100%;
font-display: swap;
src: url(https://toan123.vn/wp-content/fonts/roboto/KFO7CnqEu92Fr1ME7kSn66aGLdTylUAMa3OUBGEe.woff2) format('woff2');
unicode-range: U+0102-0103, U+0110-0111, U+0128-0129, U+0168-0169, U+01A0-01A1, U+01AF-01B0, U+0300-0301, U+0303-0304, U+0308-0309, U+0323, U+0329, U+1EA0-1EF9, U+20AB;
}
/* latin-ext */
@font-face {
font-family: 'Roboto';
font-style: normal;
font-weight: 500;
font-stretch: 100%;
font-display: swap;
src: url(https://toan123.vn/wp-content/fonts/roboto/KFO7CnqEu92Fr1ME7kSn66aGLdTylUAMa3KUBGEe.woff2) format('woff2');
unicode-range: U+0100-02BA, U+02BD-02C5, U+02C7-02CC, U+02CE-02D7, U+02DD-02FF, U+0304, U+0308, U+0329, U+1D00-1DBF, U+1E00-1E9F, U+1EF2-1EFF, U+2020, U+20A0-20AB, U+20AD-20C0, U+2113, U+2C60-2C7F, U+A720-A7FF;
}
/* latin */
@font-face {
font-family: 'Roboto';
font-style: normal;
font-weight: 500;
font-stretch: 100%;
font-display: swap;
src: url(https://toan123.vn/wp-content/fonts/roboto/KFO7CnqEu92Fr1ME7kSn66aGLdTylUAMa3yUBA.woff2) format('woff2');
unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}/* vietnamese */
@font-face {
font-family: 'Dancing Script';
font-style: normal;
font-weight: 400;
font-display: swap;
src: url(https://toan123.vn/wp-content/fonts/dancing-script/If2cXTr6YS-zF4S-kcSWSVi_sxjsohD9F50Ruu7BMSo3Rep8ltA.woff2) format('woff2');
unicode-range: U+0102-0103, U+0110-0111, U+0128-0129, U+0168-0169, U+01A0-01A1, U+01AF-01B0, U+0300-0301, U+0303-0304, U+0308-0309, U+0323, U+0329, U+1EA0-1EF9, U+20AB;
}
/* latin-ext */
@font-face {
font-family: 'Dancing Script';
font-style: normal;
font-weight: 400;
font-display: swap;
src: url(https://toan123.vn/wp-content/fonts/dancing-script/If2cXTr6YS-zF4S-kcSWSVi_sxjsohD9F50Ruu7BMSo3ROp8ltA.woff2) format('woff2');
unicode-range: U+0100-02BA, U+02BD-02C5, U+02C7-02CC, U+02CE-02D7, U+02DD-02FF, U+0304, U+0308, U+0329, U+1D00-1DBF, U+1E00-1E9F, U+1EF2-1EFF, U+2020, U+20A0-20AB, U+20AD-20C0, U+2113, U+2C60-2C7F, U+A720-A7FF;
}
/* latin */
@font-face {
font-family: 'Dancing Script';
font-style: normal;
font-weight: 400;
font-display: swap;
src: url(https://toan123.vn/wp-content/fonts/dancing-script/If2cXTr6YS-zF4S-kcSWSVi_sxjsohD9F50Ruu7BMSo3Sup8.woff2) format('woff2');
unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}</style></head>

<body class="home wp-singular page-template-default page page-id-21 wp-theme-flatsome wp-child-theme-flatsome-child header-shadow lightbox nav-dropdown-has-arrow nav-dropdown-has-shadow nav-dropdown-has-border">

<a class="skip-link screen-reader-text" href="#main">Bỏ qua nội dung</a>

<div id="wrapper">

<header id="header" class="header has-sticky sticky-jump">
<div class="header-wrapper">
<div id="top-bar" class="header-top hide-for-sticky nav-dark show-for-medium">
<div class="flex-row container">
<div class="flex-col hide-for-medium flex-left">
<ul class="nav nav-left medium-nav-center nav-small nav-divided">
</ul>
</div>

<div class="flex-col hide-for-medium flex-center">
<ul class="nav nav-center nav-small nav-divided">
</ul>
</div>

<div class="flex-col hide-for-medium flex-right">
<ul class="nav top-bar-nav nav-right nav-small nav-divided">
</ul>
</div>

<div class="flex-col show-for-medium flex-grow">
<ul class="nav nav-center nav-small mobile-nav nav-divided">
<li class="html custom html_topbar_left"><strong class="uppercase">Add anything here or just remove it...</strong></li> </ul>
</div>

</div>
</div>
<div id="masthead" class="header-main ">
<div class="header-inner flex-row container logo-left medium-logo-left" role="navigation">


<div id="logo" class="flex-col logo">


<a href="https://toan123.vn/" title="Cộng đồng toán học – Toan123.vn" rel="home">
<img width="442" height="130" src="https://toan123.vn/wp-content/uploads/2025/02/logo.png" class="header_logo header-logo" alt="Cộng đồng toán học – Toan123.vn"/><img width="442" height="130" src="https://toan123.vn/wp-content/uploads/2025/02/logo.png" class="header-logo-dark" alt="Cộng đồng toán học – Toan123.vn"/></a>
</div>


<div class="flex-col show-for-medium flex-left">
<ul class="mobile-nav nav nav-left ">
</ul>
</div>


<div class="flex-col hide-for-medium flex-left
flex-grow">
<ul class="header-nav header-nav-main nav nav-left nav-size-large nav-spacing-xlarge nav-uppercase" >
</ul>
</div>


<div class="flex-col hide-for-medium flex-right">
<ul class="header-nav header-nav-main nav nav-right nav-size-large nav-spacing-xlarge nav-uppercase">
<li id="menu-item-6" class="menu-item menu-item-type-custom menu-item-object-custom current-menu-item current_page_item menu-item-6 active menu-item-design-default"><a href="/" aria-current="page" class="nav-top-link">Trang chủ</a></li>
<li id="menu-item-7" class="menu-item menu-item-type-custom menu-item-object-custom menu-item-7 menu-item-design-default"><a href="#" class="nav-top-link">Khóa học</a></li>
<li id="menu-item-8" class="menu-item menu-item-type-custom menu-item-object-custom menu-item-8 menu-item-design-default"><a href="#" class="nav-top-link">Cộng đồng</a></li>
<li id="menu-item-10" class="menu-item menu-item-type-taxonomy menu-item-object-category menu-item-10 menu-item-design-default"><a href="https://toan123.vn/tai-lieu/" class="nav-top-link">Tài Liệu</a></li>
<li id="menu-item-11" class="menu-item menu-item-type-taxonomy menu-item-object-category menu-item-11 menu-item-design-default"><a href="https://toan123.vn/tin-tuc/" class="nav-top-link">Tin tức</a></li>
<li id="menu-item-12" class="menu-item menu-item-type-custom menu-item-object-custom menu-item-12 menu-item-design-default"><a href="#" class="nav-top-link">Video</a></li>
</ul>
</div>


<div class="flex-col show-for-medium flex-right">
<ul class="mobile-nav nav nav-right ">
<li class="nav-icon has-icon">
<div class="header-button"> <a href="#" data-open="#main-menu" data-pos="right" data-bg="main-menu-overlay" data-color="" class="icon primary button round is-small" aria-label="Menu" aria-controls="main-menu" aria-expanded="false">

<i class="icon-menu" ></i>
</a>
</div> </li>
</ul>
</div>

</div>

</div>

<div class="header-bg-container fill"><div class="header-bg-image fill"></div><div class="header-bg-color fill"></div></div> </div>
</header>

<main id="main" class="">
<div id="content" class="content-area page-wrapper" role="main">
<div class="row row-main">
<div class="large-12 col">
<div class="col-inner">

<div class="row" id="row-199196421">

<div id="col-1879782922" class="col small-12 large-12" >
<div class="col-inner" >

<div id="text-961020311" class="text">

<h2>Lý thuyết</h2>

<style>
#text-961020311 {
color: rgb(55, 63, 80);
}
#text-961020311 > * {
color: rgb(55, 63, 80);
}
</style>
</div>

<div class="is-divider divider clearfix" style="max-width:100%;height:1px;"></div>

<div class="row large-columns-4 medium-columns-3 small-columns-2 has-shadow row-box-shadow-2" >
<div class="col post-item" >
<div class="col-inner">
<div class="box box-normal box-text-bottom box-blog-post has-hover">
<div class="box-image" >
<div class="image-cover" style="padding-top:100%;">
<a href="https://toan123.vn/ly-thuyet/toan-1/" class="plain" aria-label="Toán 1">
<img fetchpriority="high" decoding="async" width="800" height="800" src="https://toan123.vn/wp-content/uploads/2025/03/ly-thuyet-toan-1.png" class="attachment-size_hinh_moi_cua_toi size-size_hinh_moi_cua_toi wp-post-image" alt="" srcset="https://toan123.vn/wp-content/uploads/2025/03/ly-thuyet-toan-1.png 800w, https://toan123.vn/wp-content/uploads/2025/03/ly-thuyet-toan-1-300x300.png 300w, https://toan123.vn/wp-content/uploads/2025/03/ly-thuyet-toan-1-150x150.png 150w, https://toan123.vn/wp-content/uploads/2025/03/ly-thuyet-toan-1-768x768.png 768w" sizes="(max-width: 800px) 100vw, 800px" /> </a>
</div>
</div>
<div class="box-text text-left" >
<div class="box-text-inner blog-post-inner">

<h5 class="post-title is-large ">
<a href="https://toan123.vn/ly-thuyet/toan-1/" class="plain">Toán 1</a>
</h5>
<div class="is-divider"></div>

</div>
</div>
</div>
</div>
</div><div class="col post-item" >
<div class="col-inner">
<div class="box box-normal box-text-bottom box-blog-post has-hover">
<div class="box-image" >
<div class="image-cover" style="padding-top:100%;">
<a href="https://toan123.vn/ly-thuyet/toan-2/" class="plain" aria-label="Toán 2">
<img decoding="async" width="800" height="800" src="https://toan123.vn/wp-content/uploads/2025/03/ly-thuyet-toan-2.png" class="attachment-size_hinh_moi_cua_toi size-size_hinh_moi_cua_toi wp-post-image" alt="" srcset="https://toan123.vn/wp-content/uploads/2025/03/ly-thuyet-toan-2.png 800w, https://toan123.vn/wp-content/uploads/2025/03/ly-thuyet-toan-2-300x300.png 300w, https://toan123.vn/wp-content/uploads/2025/03/ly-thuyet-toan-2-150x150.png 150w, https://toan123.vn/wp-content/uploads/2025/03/ly-thuyet-toan-2-768x768.png 768w" sizes="(max-width: 800px) 100vw, 800px" /> </a>
</div>
</div>
<div class="box-text text-left" >
<div class="box-text-inner blog-post-inner">

<h5 class="post-title is-large ">
<a href="https://toan123.vn/ly-thuyet/toan-2/" class="plain">Toán 2</a>
</h5>
<div class="is-divider"></div>

</div>
</div>
</div>
</div>
</div><div class="col post-item" >
<div class="col-inner">
<div class="box box-normal box-text-bottom box-blog-post has-hover">
<div class="box-image" >
<div class="image-cover" style="padding-top:100%;">
<a href="https://toan123.vn/ly-thuyet/toan-3/" class="plain" aria-label="Toán 3">
<img decoding="async" width="800" height="800" src="https://toan123.vn/wp-content/uploads/2025/03/ly-thuyet-toan-3.png" class="attachment-size_hinh_moi_cua_toi size-size_hinh_moi_cua_toi wp-post-image" alt="" srcset="https://toan123.vn/wp-content/uploads/2025/03/ly-thuyet-toan-3.png 800w, https://toan123.vn/wp-content/uploads/2025/03/ly-thuyet-toan-3-300x300.png 300w, https://toan123.vn/wp-content/uploads/2025/03/ly-thuyet-toan-3-150x150.png 150w, https://toan123.vn/wp-content/uploads/2025/03/ly-thuyet-toan-3-768x768.png 768w" sizes="(max-width: 800px) 100vw, 800px" /> </a>
</div>
</div>
<div class="box-text text-left" >
<div class="box-text-inner blog-post-inner">

<h5 class="post-title is-large ">
<a href="https://toan123.vn/ly-thuyet/toan-3/" class="plain">Toán 3</a>
</h5>
<div class="is-divider"></div>

</div>
</div>
</div>
</div>
</div><div class="col post-item" >
<div class="col-inner">
<div class="box box-normal box-text-bottom box-blog-post has-hover">
<div class="box-image" >
<div class="image-cover" style="padding-top:100%;">
<a href="https://toan123.vn/ly-thuyet/toan-4/" class="plain" aria-label="Toán 4">
<img loading="lazy" decoding="async" width="800" height="800" src="https://toan123.vn/wp-content/uploads/2025/03/ly-thuyet-toan-4.png" class="attachment-size_hinh_moi_cua_toi size-size_hinh_moi_cua_toi wp-post-image" alt="" srcset="https://toan123.vn/wp-content/uploads/2025/03/ly-thuyet-toan-4.png 800w, https://toan123.vn/wp-content/uploads/2025/03/ly-thuyet-toan-4-300x300.png 300w, https://toan123.vn/wp-content/uploads/2025/03/ly-thuyet-toan-4-150x150.png 150w, https://toan123.vn/wp-content/uploads/2025/03/ly-thuyet-toan-4-768x768.png 768w" sizes="auto, (max-width: 800px) 100vw, 800px" /> </a>
</div>
</div>
<div class="box-text text-left" >
<div class="box-text-inner blog-post-inner">

<h5 class="post-title is-large ">
<a href="https://toan123.vn/ly-thuyet/toan-4/" class="plain">Toán 4</a>
</h5>
<div class="is-divider"></div>

</div>
</div>
</div>
</div>
</div><div class="col post-item" >
<div class="col-inner">
<div class="box box-normal box-text-bottom box-blog-post has-hover">
<div class="box-image" >
<div class="image-cover" style="padding-top:100%;">
<a href="https://toan123.vn/ly-thuyet/toan-5/" class="plain" aria-label="Toán 5">
<img loading="lazy" decoding="async" width="800" height="800" src="https://toan123.vn/wp-content/uploads/2025/03/ly-thuyet-toan-5.png" class="attachment-size_hinh_moi_cua_toi size-size_hinh_moi_cua_toi wp-post-image" alt="" srcset="https://toan123.vn/wp-content/uploads/2025/03/ly-thuyet-toan-5.png 800w, https://toan123.vn/wp-content/uploads/2025/03/ly-thuyet-toan-5-300x300.png 300w, https://toan123.vn/wp-content/uploads/2025/03/ly-thuyet-toan-5-150x150.png 150w, https://toan123.vn/wp-content/uploads/2025/03/ly-thuyet-toan-5-768x768.png 768w" sizes="auto, (max-width: 800px) 100vw, 800px" /> </a>
</div>
</div>
<div class="box-text text-left" >
<div class="box-text-inner blog-post-inner">

<h5 class="post-title is-large ">
<a href="https://toan123.vn/ly-thuyet/toan-5/" class="plain">Toán 5</a>
</h5>
<div class="is-divider"></div>

</div>
</div>
</div>
</div>
</div><div class="col post-item" >
<div class="col-inner">
<div class="box box-normal box-text-bottom box-blog-post has-hover">
<div class="box-image" >
<div class="image-cover" style="padding-top:100%;">
<a href="https://toan123.vn/ly-thuyet/toan-6/" class="plain" aria-label="Toán 6">
<img loading="lazy" decoding="async" width="800" height="800" src="https://toan123.vn/wp-content/uploads/2025/03/ly-thuyet-toan-6.png" class="attachment-size_hinh_moi_cua_toi size-size_hinh_moi_cua_toi wp-post-image" alt="" srcset="https://toan123.vn/wp-content/uploads/2025/03/ly-thuyet-toan-6.png 800w, https://toan123.vn/wp-content/uploads/2025/03/ly-thuyet-toan-6-300x300.png 300w, https://toan123.vn/wp-content/uploads/2025/03/ly-thuyet-toan-6-150x150.png 150w, https://toan123.vn/wp-content/uploads/2025/03/ly-thuyet-toan-6-768x768.png 768w" sizes="auto, (max-width: 800px) 100vw, 800px" /> </a>
</div>
</div>
<div class="box-text text-left" >
<div class="box-text-inner blog-post-inner">

<h5 class="post-title is-large ">
<a href="https://toan123.vn/ly-thuyet/toan-6/" class="plain">Toán 6</a>
</h5>
<div class="is-divider"></div>

</div>
</div>
</div>
</div>
</div><div class="col post-item" >
<div class="col-inner">
<div class="box box-normal box-text-bottom box-blog-post has-hover">
<div class="box-image" >
<div class="image-cover" style="padding-top:100%;">
<a href="https://toan123.vn/ly-thuyet/toan-7/" class="plain" aria-label="Toán 7">
<img loading="lazy" decoding="async" width="800" height="800" src="https://toan123.vn/wp-content/uploads/2025/03/ly-thuyet-toan-7.png" class="attachment-size_hinh_moi_cua_toi size-size_hinh_moi_cua_toi wp-post-image" alt="" srcset="https://toan123.vn/wp-content/uploads/2025/03/ly-thuyet-toan-7.png 800w, https://toan123.vn/wp-content/uploads/2025/03/ly-thuyet-toan-7-300x300.png 300w, https://toan123.vn/wp-content/uploads/2025/03/ly-thuyet-toan-7-150x150.png 150w, https://toan123.vn/wp-content/uploads/2025/03/ly-thuyet-toan-7-768x768.png 768w" sizes="auto, (max-width: 800px) 100vw, 800px" /> </a>
</div>
</div>
<div class="box-text text-left" >
<div class="box-text-inner blog-post-inner">

<h5 class="post-title is-large ">
<a href="https://toan123.vn/ly-thuyet/toan-7/" class="plain">Toán 7</a>
</h5>
<div class="is-divider"></div>

</div>
</div>
</div>
</div>
</div><div class="col post-item" >
<div class="col-inner">
<div class="box box-normal box-text-bottom box-blog-post has-hover">
<div class="box-image" >
<div class="image-cover" style="padding-top:100%;">
<a href="https://toan123.vn/ly-thuyet/toan-8/" class="plain" aria-label="Toán 8">
<img loading="lazy" decoding="async" width="800" height="800" src="https://toan123.vn/wp-content/uploads/2025/03/ly-thuyet-toan-8.png" class="attachment-size_hinh_moi_cua_toi size-size_hinh_moi_cua_toi wp-post-image" alt="" srcset="https://toan123.vn/wp-content/uploads/2025/03/ly-thuyet-toan-8.png 800w, https://toan123.vn/wp-content/uploads/2025/03/ly-thuyet-toan-8-300x300.png 300w, https://toan123.vn/wp-content/uploads/2025/03/ly-thuyet-toan-8-150x150.png 150w, https://toan123.vn/wp-content/uploads/2025/03/ly-thuyet-toan-8-768x768.png 768w" sizes="auto, (max-width: 800px) 100vw, 800px" /> </a>
</div>
</div>
<div class="box-text text-left" >
<div class="box-text-inner blog-post-inner">

<h5 class="post-title is-large ">
<a href="https://toan123.vn/ly-thuyet/toan-8/" class="plain">Toán 8</a>
</h5>
<div class="is-divider"></div>

</div>
</div>
</div>
</div>
</div><div class="col post-item" >
<div class="col-inner">
<div class="box box-normal box-text-bottom box-blog-post has-hover">
<div class="box-image" >
<div class="image-cover" style="padding-top:100%;">
<a href="https://toan123.vn/ly-thuyet/toan-10/" class="plain" aria-label="Toán 10">
<img loading="lazy" decoding="async" width="800" height="800" src="https://toan123.vn/wp-content/uploads/2025/03/ly-thuyet-toan-10.png" class="attachment-size_hinh_moi_cua_toi size-size_hinh_moi_cua_toi wp-post-image" alt="" srcset="https://toan123.vn/wp-content/uploads/2025/03/ly-thuyet-toan-10.png 800w, https://toan123.vn/wp-content/uploads/2025/03/ly-thuyet-toan-10-300x300.png 300w, https://toan123.vn/wp-content/uploads/2025/03/ly-thuyet-toan-10-150x150.png 150w, https://toan123.vn/wp-content/uploads/2025/03/ly-thuyet-toan-10-768x768.png 768w" sizes="auto, (max-width: 800px) 100vw, 800px" /> </a>
</div>
</div>
<div class="box-text text-left" >
<div class="box-text-inner blog-post-inner">

<h5 class="post-title is-large ">
<a href="https://toan123.vn/ly-thuyet/toan-10/" class="plain">Toán 10</a>
</h5>
<div class="is-divider"></div>

</div>
</div>
</div>
</div>
</div><div class="col post-item" >
<div class="col-inner">
<div class="box box-normal box-text-bottom box-blog-post has-hover">
<div class="box-image" >
<div class="image-cover" style="padding-top:100%;">
<a href="https://toan123.vn/ly-thuyet/toan-11/" class="plain" aria-label="Toán 11">
<img loading="lazy" decoding="async" width="800" height="800" src="https://toan123.vn/wp-content/uploads/2025/03/ly-thuyet-toan-11.png" class="attachment-size_hinh_moi_cua_toi size-size_hinh_moi_cua_toi wp-post-image" alt="" srcset="https://toan123.vn/wp-content/uploads/2025/03/ly-thuyet-toan-11.png 800w, https://toan123.vn/wp-content/uploads/2025/03/ly-thuyet-toan-11-300x300.png 300w, https://toan123.vn/wp-content/uploads/2025/03/ly-thuyet-toan-11-150x150.png 150w, https://toan123.vn/wp-content/uploads/2025/03/ly-thuyet-toan-11-768x768.png 768w" sizes="auto, (max-width: 800px) 100vw, 800px" /> </a>
</div>
</div>
<div class="box-text text-left" >
<div class="box-text-inner blog-post-inner">

<h5 class="post-title is-large ">
<a href="https://toan123.vn/ly-thuyet/toan-11/" class="plain">Toán 11</a>
</h5>
<div class="is-divider"></div>

</div>
</div>
</div>
</div>
</div><div class="col post-item" >
<div class="col-inner">
<div class="box box-normal box-text-bottom box-blog-post has-hover">
<div class="box-image" >
<div class="image-cover" style="padding-top:100%;">
<a href="https://toan123.vn/ly-thuyet/toan-12/" class="plain" aria-label="Toán 12">
<img loading="lazy" decoding="async" width="800" height="800" src="https://toan123.vn/wp-content/uploads/2025/03/ly-thuyet-toan-12-1.png" class="attachment-size_hinh_moi_cua_toi size-size_hinh_moi_cua_toi wp-post-image" alt="" srcset="https://toan123.vn/wp-content/uploads/2025/03/ly-thuyet-toan-12-1.png 800w, https://toan123.vn/wp-content/uploads/2025/03/ly-thuyet-toan-12-1-300x300.png 300w, https://toan123.vn/wp-content/uploads/2025/03/ly-thuyet-toan-12-1-150x150.png 150w, https://toan123.vn/wp-content/uploads/2025/03/ly-thuyet-toan-12-1-768x768.png 768w" sizes="auto, (max-width: 800px) 100vw, 800px" /> </a>
</div>
</div>
<div class="box-text text-left" >
<div class="box-text-inner blog-post-inner">

<h5 class="post-title is-large ">
<a href="https://toan123.vn/ly-thuyet/toan-12/" class="plain">Toán 12</a>
</h5>
<div class="is-divider"></div>

</div>
</div>
</div>
</div>
</div></div>
</div>
</div>

<div id="col-2085078155" class="col small-12 large-12" >
<div class="col-inner" >

<div id="text-602207305" class="text">

<h2>Giáo dục</h2>

<style>
#text-602207305 {
color: rgb(55, 63, 80);
}
#text-602207305 > * {
color: rgb(55, 63, 80);
}
</style>
</div>

<div class="is-divider divider clearfix" style="max-width:100%;height:1px;"></div>

<div class="row large-columns-3 medium-columns-3 small-columns-1" >
<div class="col post-item" >
<div class="col-inner">
<div class="box box-normal box-text-bottom box-blog-post has-hover">
<div class="box-image" >
<div class="image-cover" style="padding-top:56.25%;">
<a href="https://toan123.vn/tai-lieu/phieu-bai-tap-tuan-toan-9-tuan-31-ds/" class="plain" aria-label="Phiếu bài tập tuần Toán 9 – Tuần 31 – Đs">
<img loading="lazy" decoding="async" width="640" height="480" src="https://toan123.vn/wp-content/uploads/2025/03/default-thumbnail.jpg" class="attachment-size_hinh_moi_cua_toi size-size_hinh_moi_cua_toi wp-post-image default-featured-img" alt="" srcset="https://toan123.vn/wp-content/uploads/2025/03/default-thumbnail.jpg 640w, https://toan123.vn/wp-content/uploads/2025/03/default-thumbnail-300x225.jpg 300w" sizes="auto, (max-width: 640px) 100vw, 640px" /> </a>
</div>
</div>
<div class="box-text text-left" >
<div class="box-text-inner blog-post-inner">

<h5 class="post-title is-larger ">
<a href="https://toan123.vn/tai-lieu/phieu-bai-tap-tuan-toan-9-tuan-31-ds/" class="plain">Phiếu bài tập tuần Toán 9 – Tuần 31 – Đs</a>
</h5>
<div class="is-divider"></div>
<p class="from_the_blog_excerpt ">
PHIẾU HỌC TẬP TOÁN 9 TUẦN 31 Đại số 9                      § 8; Giải bài </p>

</div>
</div>
</div>
</div>
</div><div class="col post-item" >
<div class="col-inner">
<div class="box box-normal box-text-bottom box-blog-post has-hover">
<div class="box-image" >
<div class="image-cover" style="padding-top:56.25%;">
<a href="https://toan123.vn/tai-lieu/phieu-bai-tap-tuan-toan-9-tuan-30/" class="plain" aria-label="Phiếu bài tập tuần Toán 9 – Tuần 30">
<img loading="lazy" decoding="async" width="640" height="480" src="https://toan123.vn/wp-content/uploads/2025/03/default-thumbnail.jpg" class="attachment-size_hinh_moi_cua_toi size-size_hinh_moi_cua_toi wp-post-image default-featured-img" alt="" srcset="https://toan123.vn/wp-content/uploads/2025/03/default-thumbnail.jpg 640w, https://toan123.vn/wp-content/uploads/2025/03/default-thumbnail-300x225.jpg 300w" sizes="auto, (max-width: 640px) 100vw, 640px" /> </a>
</div>
</div>
<div class="box-text text-left" >
<div class="box-text-inner blog-post-inner">

<h5 class="post-title is-larger ">
<a href="https://toan123.vn/tai-lieu/phieu-bai-tap-tuan-toan-9-tuan-30/" class="plain">Phiếu bài tập tuần Toán 9 – Tuần 30</a>
</h5>
<div class="is-divider"></div>
<p class="from_the_blog_excerpt ">
PHIẾU HỌC TẬP TOÁN 9 TUẦN 30 Đại số 9                      Ôn tập: Phương trình </p>

</div>
</div>
</div>
</div>
</div><div class="col post-item" >
<div class="col-inner">
<div class="box box-normal box-text-bottom box-blog-post has-hover">
<div class="box-image" >
<div class="image-cover" style="padding-top:56.25%;">
<a href="https://toan123.vn/tai-lieu/phieu-bai-tap-tuan-toan-9-tuan-29/" class="plain" aria-label="Phiếu bài tập tuần Toán 9 – Tuần 29">
<img loading="lazy" decoding="async" width="640" height="480" src="https://toan123.vn/wp-content/uploads/2025/03/default-thumbnail.jpg" class="attachment-size_hinh_moi_cua_toi size-size_hinh_moi_cua_toi wp-post-image default-featured-img" alt="" srcset="https://toan123.vn/wp-content/uploads/2025/03/default-thumbnail.jpg 640w, https://toan123.vn/wp-content/uploads/2025/03/default-thumbnail-300x225.jpg 300w" sizes="auto, (max-width: 640px) 100vw, 640px" /> </a>
</div>
</div>
<div class="box-text text-left" >
<div class="box-text-inner blog-post-inner">

<h5 class="post-title is-larger ">
<a href="https://toan123.vn/tai-lieu/phieu-bai-tap-tuan-toan-9-tuan-29/" class="plain">Phiếu bài tập tuần Toán 9 – Tuần 29</a>
</h5>
<div class="is-divider"></div>
<p class="from_the_blog_excerpt ">
PHIẾU HỌC TẬP TOÁN 9 TUẦN 29 Đại số 9          §6:       </p>

</div>
</div>
</div>
</div>
</div><div class="col post-item" >
<div class="col-inner">
<div class="box box-normal box-text-bottom box-blog-post has-hover">
<div class="box-image" >
<div class="image-cover" style="padding-top:56.25%;">
<a href="https://toan123.vn/tai-lieu/phieu-bai-tap-tuan-toan-9-tuan-28/" class="plain" aria-label="Phiếu bài tập tuần Toán 9 – Tuần 28">
<img loading="lazy" decoding="async" width="640" height="480" src="https://toan123.vn/wp-content/uploads/2025/03/default-thumbnail.jpg" class="attachment-size_hinh_moi_cua_toi size-size_hinh_moi_cua_toi wp-post-image default-featured-img" alt="" srcset="https://toan123.vn/wp-content/uploads/2025/03/default-thumbnail.jpg 640w, https://toan123.vn/wp-content/uploads/2025/03/default-thumbnail-300x225.jpg 300w" sizes="auto, (max-width: 640px) 100vw, 640px" /> </a>
</div>
</div>
<div class="box-text text-left" >
<div class="box-text-inner blog-post-inner">

<h5 class="post-title is-larger ">
<a href="https://toan123.vn/tai-lieu/phieu-bai-tap-tuan-toan-9-tuan-28/" class="plain">Phiếu bài tập tuần Toán 9 – Tuần 28</a>
</h5>
<div class="is-divider"></div>
<p class="from_the_blog_excerpt ">
PHIẾU HỌC TẬP TOÁN 9 TUẦN 28 Đại số 9. §4+5: Công thức nghiệm ( </p>

</div>
</div>
</div>
</div>
</div><div class="col post-item" >
<div class="col-inner">
<div class="box box-normal box-text-bottom box-blog-post has-hover">
<div class="box-image" >
<div class="image-cover" style="padding-top:56.25%;">
<a href="https://toan123.vn/tai-lieu/phieu-bai-tap-tuan-toan-9-tuan-26/" class="plain" aria-label="Phiếu bài tập tuần Toán 9 – Tuần 26">
<img loading="lazy" decoding="async" width="640" height="480" src="https://toan123.vn/wp-content/uploads/2025/03/default-thumbnail.jpg" class="attachment-size_hinh_moi_cua_toi size-size_hinh_moi_cua_toi wp-post-image default-featured-img" alt="" srcset="https://toan123.vn/wp-content/uploads/2025/03/default-thumbnail.jpg 640w, https://toan123.vn/wp-content/uploads/2025/03/default-thumbnail-300x225.jpg 300w" sizes="auto, (max-width: 640px) 100vw, 640px" /> </a>
</div>
</div>
<div class="box-text text-left" >
<div class="box-text-inner blog-post-inner">

<h5 class="post-title is-larger ">
<a href="https://toan123.vn/tai-lieu/phieu-bai-tap-tuan-toan-9-tuan-26/" class="plain">Phiếu bài tập tuần Toán 9 – Tuần 26</a>
</h5>
<div class="is-divider"></div>
<p class="from_the_blog_excerpt ">
PHIẾU HỌC TẬP TOÁN 9 TUẦN 26 Đại số 9 :        § 3: Phương </p>

</div>
</div>
</div>
</div>
</div><div class="col post-item" >
<div class="col-inner">
<div class="box box-normal box-text-bottom box-blog-post has-hover">
<div class="box-image" >
<div class="image-cover" style="padding-top:56.25%;">
<a href="https://toan123.vn/tai-lieu/phieu-bai-tap-tuan-toan-9-tuan-25/" class="plain" aria-label="Phiếu bài tập tuần Toán 9 – Tuần 25">
<img loading="lazy" decoding="async" width="640" height="480" src="https://toan123.vn/wp-content/uploads/2025/03/default-thumbnail.jpg" class="attachment-size_hinh_moi_cua_toi size-size_hinh_moi_cua_toi wp-post-image default-featured-img" alt="" srcset="https://toan123.vn/wp-content/uploads/2025/03/default-thumbnail.jpg 640w, https://toan123.vn/wp-content/uploads/2025/03/default-thumbnail-300x225.jpg 300w" sizes="auto, (max-width: 640px) 100vw, 640px" /> </a>
</div>
</div>
<div class="box-text text-left" >
<div class="box-text-inner blog-post-inner">

<h5 class="post-title is-larger ">
<a href="https://toan123.vn/tai-lieu/phieu-bai-tap-tuan-toan-9-tuan-25/" class="plain">Phiếu bài tập tuần Toán 9 – Tuần 25</a>
</h5>
<div class="is-divider"></div>
<p class="from_the_blog_excerpt ">
PHIẾU HỌC TẬP TOÁN 9 TUẦN 25 Đại số 9 :        § 2: Đồ </p>

</div>
</div>
</div>
</div>
</div><div class="col post-item" >
<div class="col-inner">
<div class="box box-normal box-text-bottom box-blog-post has-hover">
<div class="box-image" >
<div class="image-cover" style="padding-top:56.25%;">
<a href="https://toan123.vn/tai-lieu/phieu-bai-tap-tuan-toan-9-tuan-24/" class="plain" aria-label="Phiếu bài tập tuần Toán 9 – Tuần 24">
<img loading="lazy" decoding="async" width="640" height="480" src="https://toan123.vn/wp-content/uploads/2025/03/default-thumbnail.jpg" class="attachment-size_hinh_moi_cua_toi size-size_hinh_moi_cua_toi wp-post-image default-featured-img" alt="" srcset="https://toan123.vn/wp-content/uploads/2025/03/default-thumbnail.jpg 640w, https://toan123.vn/wp-content/uploads/2025/03/default-thumbnail-300x225.jpg 300w" sizes="auto, (max-width: 640px) 100vw, 640px" /> </a>
</div>
</div>
<div class="box-text text-left" >
<div class="box-text-inner blog-post-inner">

<h5 class="post-title is-larger ">
<a href="https://toan123.vn/tai-lieu/phieu-bai-tap-tuan-toan-9-tuan-24/" class="plain">Phiếu bài tập tuần Toán 9 – Tuần 24</a>
</h5>
<div class="is-divider"></div>
<p class="from_the_blog_excerpt ">
PHIẾU HỌC TẬP TOÁN 9 TUẦN 24 Đại số 9                      Ôn tập Hàm số </p>

</div>
</div>
</div>
</div>
</div><div class="col post-item" >
<div class="col-inner">
<div class="box box-normal box-text-bottom box-blog-post has-hover">
<div class="box-image" >
<div class="image-cover" style="padding-top:56.25%;">
<a href="https://toan123.vn/tai-lieu/phieu-bai-tap-tuan-toan-9-tuan-23/" class="plain" aria-label="Phiếu bài tập tuần Toán 9 – Tuần 23">
<img loading="lazy" decoding="async" width="640" height="480" src="https://toan123.vn/wp-content/uploads/2025/03/default-thumbnail.jpg" class="attachment-size_hinh_moi_cua_toi size-size_hinh_moi_cua_toi wp-post-image default-featured-img" alt="" srcset="https://toan123.vn/wp-content/uploads/2025/03/default-thumbnail.jpg 640w, https://toan123.vn/wp-content/uploads/2025/03/default-thumbnail-300x225.jpg 300w" sizes="auto, (max-width: 640px) 100vw, 640px" /> </a>
</div>
</div>
<div class="box-text text-left" >
<div class="box-text-inner blog-post-inner">

<h5 class="post-title is-larger ">
<a href="https://toan123.vn/tai-lieu/phieu-bai-tap-tuan-toan-9-tuan-23/" class="plain">Phiếu bài tập tuần Toán 9 – Tuần 23</a>
</h5>
<div class="is-divider"></div>
<p class="from_the_blog_excerpt ">
PHIẾU HỌC TẬP TOÁN 9 TUẦN 23 Đại số 9                      § 1; Hàm số </p>

</div>
</div>
</div>
</div>
</div><div class="col post-item" >
<div class="col-inner">
<div class="box box-normal box-text-bottom box-blog-post has-hover">
<div class="box-image" >
<div class="image-cover" style="padding-top:56.25%;">
<a href="https://toan123.vn/tai-lieu/phieu-bai-tap-tuan-toan-9-tuan-22/" class="plain" aria-label="Phiếu bài tập tuần Toán 9 – Tuần 22">
<img loading="lazy" decoding="async" width="640" height="480" src="https://toan123.vn/wp-content/uploads/2025/03/default-thumbnail.jpg" class="attachment-size_hinh_moi_cua_toi size-size_hinh_moi_cua_toi wp-post-image default-featured-img" alt="" srcset="https://toan123.vn/wp-content/uploads/2025/03/default-thumbnail.jpg 640w, https://toan123.vn/wp-content/uploads/2025/03/default-thumbnail-300x225.jpg 300w" sizes="auto, (max-width: 640px) 100vw, 640px" /> </a>
</div>
</div>
<div class="box-text text-left" >
<div class="box-text-inner blog-post-inner">

<h5 class="post-title is-larger ">
<a href="https://toan123.vn/tai-lieu/phieu-bai-tap-tuan-toan-9-tuan-22/" class="plain">Phiếu bài tập tuần Toán 9 – Tuần 22</a>
</h5>
<div class="is-divider"></div>
<p class="from_the_blog_excerpt ">
PHIẾU HỌC TẬP TOÁN 9 TUẦN 22 Đại số 9                      Ôn tập chương III </p>

</div>
</div>
</div>
</div>
</div></div>
</div>
</div>

<div id="col-1961930154" class="col small-12 large-12" >
<div class="col-inner" >

<div id="text-1297368142" class="text">

<h2>Tài liệu</h2>

<style>
#text-1297368142 {
color: rgb(55, 63, 80);
}
#text-1297368142 > * {
color: rgb(55, 63, 80);
}
</style>
</div>

<div class="is-divider divider clearfix" style="max-width:100%;height:1px;"></div>

<div class="row large-columns-4 medium-columns-3 small-columns-2" >
<div class="col post-item" >
<div class="col-inner">
<div class="box box-normal box-text-bottom box-blog-post has-hover">
<div class="box-image" >
<div class="image-cover" style="padding-top:120%;">
<a href="https://toan123.vn/tin-tuc/ket-qua-bong-da-ngoai-hang-anh/" class="plain" aria-label="Kết quả bóng đá Ngoại hạng Anh – Những trận đấu hay làm say đắm lòng cổ động viên">
<img loading="lazy" decoding="async" width="1024" height="576" src="https://toan123.vn/wp-content/uploads/2025/09/image1-1.jpg" class="attachment-size_hinh_moi_cua_toi size-size_hinh_moi_cua_toi wp-post-image" alt="" srcset="https://toan123.vn/wp-content/uploads/2025/09/image1-1.jpg 1024w, https://toan123.vn/wp-content/uploads/2025/09/image1-1-300x169.jpg 300w, https://toan123.vn/wp-content/uploads/2025/09/image1-1-768x432.jpg 768w" sizes="auto, (max-width: 1024px) 100vw, 1024px" /> </a>
</div>
</div>
<div class="box-text text-left" >
<div class="box-text-inner blog-post-inner">

<p class="cat-label is-xxsmall op-7 uppercase">
Tin tức </p>
<h5 class="post-title is-large ">
<a href="https://toan123.vn/tin-tuc/ket-qua-bong-da-ngoai-hang-anh/" class="plain">Kết quả bóng đá Ngoại hạng Anh – Những trận đấu hay làm say đắm lòng cổ động viên</a>
</h5>
<div class="is-divider"></div>

</div>
</div>
</div>
</div>
</div><div class="col post-item" >
<div class="col-inner">
<div class="box box-normal box-text-bottom box-blog-post has-hover">
<div class="box-image" >
<div class="image-cover" style="padding-top:120%;">
<a href="https://toan123.vn/tin-tuc/xem-bong-da-truc-tuyen-sieu-net/" class="plain" aria-label="Khám Phá Thỏa Thích Xem Bóng Đá Trực Tuyến Siêu Nét Siêu Kinh Điển – Trải Nghiệm Phản Hồi Đỉnh Cao">
<img loading="lazy" decoding="async" width="1200" height="628" src="https://toan123.vn/wp-content/uploads/2025/09/image2.jpg" class="attachment-size_hinh_moi_cua_toi size-size_hinh_moi_cua_toi wp-post-image" alt="" srcset="https://toan123.vn/wp-content/uploads/2025/09/image2.jpg 1200w, https://toan123.vn/wp-content/uploads/2025/09/image2-300x157.jpg 300w, https://toan123.vn/wp-content/uploads/2025/09/image2-1024x536.jpg 1024w, https://toan123.vn/wp-content/uploads/2025/09/image2-768x402.jpg 768w" sizes="auto, (max-width: 1200px) 100vw, 1200px" /> </a>
</div>
</div>
<div class="box-text text-left" >
<div class="box-text-inner blog-post-inner">

<p class="cat-label is-xxsmall op-7 uppercase">
Tin tức </p>
<h5 class="post-title is-large ">
<a href="https://toan123.vn/tin-tuc/xem-bong-da-truc-tuyen-sieu-net/" class="plain">Khám Phá Thỏa Thích Xem Bóng Đá Trực Tuyến Siêu Nét Siêu Kinh Điển – Trải Nghiệm Phản Hồi Đỉnh Cao</a>
</h5>
<div class="is-divider"></div>

</div>
</div>
</div>
</div>
</div><div class="col post-item" >
<div class="col-inner">
<div class="box box-normal box-text-bottom box-blog-post has-hover">
<div class="box-image" >
<div class="image-cover" style="padding-top:120%;">
<a href="https://toan123.vn/tin-tuc/iwinclub-san-choi-ca-cuoc-truc-tuyen/" class="plain" aria-label="IWinClub – Sân Chơi Cá Cược Trực Tuyến Hấp Dẫn Năm 2025">
<img loading="lazy" decoding="async" width="800" height="400" src="https://toan123.vn/wp-content/uploads/2025/08/iwinclub-2.webp" class="attachment-size_hinh_moi_cua_toi size-size_hinh_moi_cua_toi wp-post-image" alt="Lý do người chơi yêu thích cá cược tại hệ thống IWinClub như vậy" srcset="https://toan123.vn/wp-content/uploads/2025/08/iwinclub-2.webp 800w, https://toan123.vn/wp-content/uploads/2025/08/iwinclub-2-300x150.webp 300w, https://toan123.vn/wp-content/uploads/2025/08/iwinclub-2-768x384.webp 768w" sizes="auto, (max-width: 800px) 100vw, 800px" /> </a>
</div>
</div>
<div class="box-text text-left" >
<div class="box-text-inner blog-post-inner">

<p class="cat-label is-xxsmall op-7 uppercase">
Tin tức </p>
<h5 class="post-title is-large ">
<a href="https://toan123.vn/tin-tuc/iwinclub-san-choi-ca-cuoc-truc-tuyen/" class="plain">IWinClub – Sân Chơi Cá Cược Trực Tuyến Hấp Dẫn Năm 2025</a>
</h5>
<div class="is-divider"></div>

</div>
</div>
</div>
</div>
</div><div class="col post-item" >
<div class="col-inner">
<div class="box box-normal box-text-bottom box-blog-post has-hover">
<div class="box-image" >
<div class="image-cover" style="padding-top:120%;">
<a href="https://toan123.vn/tin-tuc/huong-dan-rut-tien-vn88/" class="plain" aria-label="Hướng Dẫn Rút Tiền Vn88 Nhanh Nhất Chỉ Trong 3 Phút">
<img loading="lazy" decoding="async" width="640" height="480" src="https://toan123.vn/wp-content/uploads/2025/03/default-thumbnail.jpg" class="attachment-size_hinh_moi_cua_toi size-size_hinh_moi_cua_toi wp-post-image default-featured-img" alt="" srcset="https://toan123.vn/wp-content/uploads/2025/03/default-thumbnail.jpg 640w, https://toan123.vn/wp-content/uploads/2025/03/default-thumbnail-300x225.jpg 300w" sizes="auto, (max-width: 640px) 100vw, 640px" /> </a>
</div>
</div>
<div class="box-text text-left" >
<div class="box-text-inner blog-post-inner">

<p class="cat-label is-xxsmall op-7 uppercase">
Tin tức </p>
<h5 class="post-title is-large ">
<a href="https://toan123.vn/tin-tuc/huong-dan-rut-tien-vn88/" class="plain">Hướng Dẫn Rút Tiền Vn88 Nhanh Nhất Chỉ Trong 3 Phút</a>
</h5>
<div class="is-divider"></div>

</div>
</div>
</div>
</div>
</div><div class="col post-item" >
<div class="col-inner">
<div class="box box-normal box-text-bottom box-blog-post has-hover">
<div class="box-image" >
<div class="image-cover" style="padding-top:120%;">
<a href="https://toan123.vn/tin-tuc/the-thao-ok365/" class="plain" aria-label="Chiến Lược Cá Cược Thể Thao ok365 Giúp Bạn Luôn Ở Kèo Trên!">
<img loading="lazy" decoding="async" width="800" height="400" src="https://toan123.vn/wp-content/uploads/2025/08/chien-luoc-ca-cuoc-the-thao-ok365-giup-ban-luon-o-keo-tren-.jpg" class="attachment-size_hinh_moi_cua_toi size-size_hinh_moi_cua_toi wp-post-image" alt="Chiến Lược Cá Cược Thể Thao ok365 Giúp Bạn Luôn Ở Kèo Trên!" srcset="https://toan123.vn/wp-content/uploads/2025/08/chien-luoc-ca-cuoc-the-thao-ok365-giup-ban-luon-o-keo-tren-.jpg 800w, https://toan123.vn/wp-content/uploads/2025/08/chien-luoc-ca-cuoc-the-thao-ok365-giup-ban-luon-o-keo-tren--300x150.jpg 300w, https://toan123.vn/wp-content/uploads/2025/08/chien-luoc-ca-cuoc-the-thao-ok365-giup-ban-luon-o-keo-tren--768x384.jpg 768w" sizes="auto, (max-width: 800px) 100vw, 800px" /> </a>
</div>
</div>
<div class="box-text text-left" >
<div class="box-text-inner blog-post-inner">

<p class="cat-label is-xxsmall op-7 uppercase">
Tin tức </p>
<h5 class="post-title is-large ">
<a href="https://toan123.vn/tin-tuc/the-thao-ok365/" class="plain">Chiến Lược Cá Cược Thể Thao ok365 Giúp Bạn Luôn Ở Kèo Trên!</a>
</h5>
<div class="is-divider"></div>

</div>
</div>
</div>
</div>
</div><div class="col post-item" >
<div class="col-inner">
<div class="box box-normal box-text-bottom box-blog-post has-hover">
<div class="box-image" >
<div class="image-cover" style="padding-top:120%;">
<a href="https://toan123.vn/tin-tuc/dang-ky-jun88/" class="plain" aria-label="Đăng Ký Jun88 – Bước Đầu Vào Thế Giới Cá Cược Đỉnh Cao">
<img loading="lazy" decoding="async" width="640" height="480" src="https://toan123.vn/wp-content/uploads/2025/03/default-thumbnail.jpg" class="attachment-size_hinh_moi_cua_toi size-size_hinh_moi_cua_toi wp-post-image default-featured-img" alt="" srcset="https://toan123.vn/wp-content/uploads/2025/03/default-thumbnail.jpg 640w, https://toan123.vn/wp-content/uploads/2025/03/default-thumbnail-300x225.jpg 300w" sizes="auto, (max-width: 640px) 100vw, 640px" /> </a>
</div>
</div>
<div class="box-text text-left" >
<div class="box-text-inner blog-post-inner">

<p class="cat-label is-xxsmall op-7 uppercase">
Tin tức </p>
<h5 class="post-title is-large ">
<a href="https://toan123.vn/tin-tuc/dang-ky-jun88/" class="plain">Đăng Ký Jun88 – Bước Đầu Vào Thế Giới Cá Cược Đỉnh Cao</a>
</h5>
<div class="is-divider"></div>

</div>
</div>
</div>
</div>
</div><div class="col post-item" >
<div class="col-inner">
<div class="box box-normal box-text-bottom box-blog-post has-hover">
<div class="box-image" >
<div class="image-cover" style="padding-top:120%;">
<a href="https://toan123.vn/tin-tuc/khuyen-mai-alo789/" class="plain" aria-label="Khuyến Mại Alo789 – Bí Quyết Tận Dụng Nạp Lần 2 Tặng 50%">
<img loading="lazy" decoding="async" width="640" height="480" src="https://toan123.vn/wp-content/uploads/2025/03/default-thumbnail.jpg" class="attachment-size_hinh_moi_cua_toi size-size_hinh_moi_cua_toi wp-post-image default-featured-img" alt="" srcset="https://toan123.vn/wp-content/uploads/2025/03/default-thumbnail.jpg 640w, https://toan123.vn/wp-content/uploads/2025/03/default-thumbnail-300x225.jpg 300w" sizes="auto, (max-width: 640px) 100vw, 640px" /> </a>
</div>
</div>
<div class="box-text text-left" >
<div class="box-text-inner blog-post-inner">

<p class="cat-label is-xxsmall op-7 uppercase">
Tin tức </p>
<h5 class="post-title is-large ">
<a href="https://toan123.vn/tin-tuc/khuyen-mai-alo789/" class="plain">Khuyến Mại Alo789 – Bí Quyết Tận Dụng Nạp Lần 2 Tặng 50%</a>
</h5>
<div class="is-divider"></div>

</div>
</div>
</div>
</div>
</div><div class="col post-item" >
<div class="col-inner">
<div class="box box-normal box-text-bottom box-blog-post has-hover">
<div class="box-image" >
<div class="image-cover" style="padding-top:120%;">
<a href="https://toan123.vn/tin-tuc/ban-ca-s666/" class="plain" aria-label="Bắn Cá S666 – Mẹo Chơi Hiệu Quả Nhận Giải Thưởng Lớn">
<img loading="lazy" decoding="async" width="800" height="400" src="https://toan123.vn/wp-content/uploads/2025/07/ban-ca-s666-2.webp" class="attachment-size_hinh_moi_cua_toi size-size_hinh_moi_cua_toi wp-post-image" alt="Những điểm thu hút newbie tham gia vào sảnh bắn cá online" srcset="https://toan123.vn/wp-content/uploads/2025/07/ban-ca-s666-2.webp 800w, https://toan123.vn/wp-content/uploads/2025/07/ban-ca-s666-2-300x150.webp 300w, https://toan123.vn/wp-content/uploads/2025/07/ban-ca-s666-2-768x384.webp 768w" sizes="auto, (max-width: 800px) 100vw, 800px" /> </a>
</div>
</div>
<div class="box-text text-left" >
<div class="box-text-inner blog-post-inner">

<p class="cat-label is-xxsmall op-7 uppercase">
Tin tức </p>
<h5 class="post-title is-large ">
<a href="https://toan123.vn/tin-tuc/ban-ca-s666/" class="plain">Bắn Cá S666 – Mẹo Chơi Hiệu Quả Nhận Giải Thưởng Lớn</a>
</h5>
<div class="is-divider"></div>

</div>
</div>
</div>
</div>
</div><div class="col post-item" >
<div class="col-inner">
<div class="box box-normal box-text-bottom box-blog-post has-hover">
<div class="box-image" >
<div class="image-cover" style="padding-top:120%;">
<a href="https://toan123.vn/tin-tuc/no-hu-jackpot/" class="plain" aria-label="Nổ Hũ Jackpot – Cuộc Chơi Đổi Thưởng Đầy Bứt Phá">
<img loading="lazy" decoding="async" width="800" height="400" src="https://toan123.vn/wp-content/uploads/2025/07/b52-club-1-3.jpg" class="attachment-size_hinh_moi_cua_toi size-size_hinh_moi_cua_toi wp-post-image" alt="Mẹo chơi nổ hũ trúng Jackpot dễ dàng" srcset="https://toan123.vn/wp-content/uploads/2025/07/b52-club-1-3.jpg 800w, https://toan123.vn/wp-content/uploads/2025/07/b52-club-1-3-300x150.jpg 300w, https://toan123.vn/wp-content/uploads/2025/07/b52-club-1-3-768x384.jpg 768w" sizes="auto, (max-width: 800px) 100vw, 800px" /> </a>
</div>
</div>
<div class="box-text text-left" >
<div class="box-text-inner blog-post-inner">

<p class="cat-label is-xxsmall op-7 uppercase">
Tin tức </p>
<h5 class="post-title is-large ">
<a href="https://toan123.vn/tin-tuc/no-hu-jackpot/" class="plain">Nổ Hũ Jackpot – Cuộc Chơi Đổi Thưởng Đầy Bứt Phá</a>
</h5>
<div class="is-divider"></div>

</div>
</div>
</div>
</div>
</div><div class="col post-item" >
<div class="col-inner">
<div class="box box-normal box-text-bottom box-blog-post has-hover">
<div class="box-image" >
<div class="image-cover" style="padding-top:120%;">
<a href="https://toan123.vn/tin-tuc/casino-online-hello88/" class="plain" aria-label="“Lật Tẩy” Chiêu Trò Của Casino online Hello88: Liệu Có “Gài” Người Chơi?">
<img loading="lazy" decoding="async" width="800" height="400" src="https://toan123.vn/wp-content/uploads/2025/07/lat-tay-chieu-tro-cua-casino-hello88-lieu-co-gai-nguoi-choi.jpg" class="attachment-size_hinh_moi_cua_toi size-size_hinh_moi_cua_toi wp-post-image" alt="Casino online Hello88" srcset="https://toan123.vn/wp-content/uploads/2025/07/lat-tay-chieu-tro-cua-casino-hello88-lieu-co-gai-nguoi-choi.jpg 800w, https://toan123.vn/wp-content/uploads/2025/07/lat-tay-chieu-tro-cua-casino-hello88-lieu-co-gai-nguoi-choi-300x150.jpg 300w, https://toan123.vn/wp-content/uploads/2025/07/lat-tay-chieu-tro-cua-casino-hello88-lieu-co-gai-nguoi-choi-768x384.jpg 768w" sizes="auto, (max-width: 800px) 100vw, 800px" /> </a>
</div>
</div>
<div class="box-text text-left" >
<div class="box-text-inner blog-post-inner">

<p class="cat-label is-xxsmall op-7 uppercase">
Tin tức </p>
<h5 class="post-title is-large ">
<a href="https://toan123.vn/tin-tuc/casino-online-hello88/" class="plain">“Lật Tẩy” Chiêu Trò Của Casino online Hello88: Liệu Có “Gài” Người Chơi?</a>
</h5>
<div class="is-divider"></div>

</div>
</div>
</div>
</div>
</div><div class="col post-item" >
<div class="col-inner">
<div class="box box-normal box-text-bottom box-blog-post has-hover">
<div class="box-image" >
<div class="image-cover" style="padding-top:120%;">
<a href="https://toan123.vn/tin-tuc/5-meo-no-hu-good88/" class="plain" aria-label="5 mẹo nổ hũ Good88 giúp bạn dễ trúng Jackpot trong 2025 – Bí quyết chinh phục casino online">
<img loading="lazy" decoding="async" width="640" height="480" src="https://toan123.vn/wp-content/uploads/2025/03/default-thumbnail.jpg" class="attachment-size_hinh_moi_cua_toi size-size_hinh_moi_cua_toi wp-post-image default-featured-img" alt="" srcset="https://toan123.vn/wp-content/uploads/2025/03/default-thumbnail.jpg 640w, https://toan123.vn/wp-content/uploads/2025/03/default-thumbnail-300x225.jpg 300w" sizes="auto, (max-width: 640px) 100vw, 640px" /> </a>
</div>
</div>
<div class="box-text text-left" >
<div class="box-text-inner blog-post-inner">

<p class="cat-label is-xxsmall op-7 uppercase">
Tin tức </p>
<h5 class="post-title is-large ">
<a href="https://toan123.vn/tin-tuc/5-meo-no-hu-good88/" class="plain">5 mẹo nổ hũ Good88 giúp bạn dễ trúng Jackpot trong 2025 – Bí quyết chinh phục casino online</a>
</h5>
<div class="is-divider"></div>

</div>
</div>
</div>
</div>
</div><div class="col post-item" >
<div class="col-inner">
<div class="box box-normal box-text-bottom box-blog-post has-hover">
<div class="box-image" >
<div class="image-cover" style="padding-top:120%;">
<a href="https://toan123.vn/tin-tuc/ty-le-keo-nha-cai/" class="plain" aria-label="Tỷ Lệ Kèo Nhà Cái – Cẩm Nang Cá Cược Người Chơi Nên Biết">
<img loading="lazy" decoding="async" width="640" height="480" src="https://toan123.vn/wp-content/uploads/2025/03/default-thumbnail.jpg" class="attachment-size_hinh_moi_cua_toi size-size_hinh_moi_cua_toi wp-post-image default-featured-img" alt="" srcset="https://toan123.vn/wp-content/uploads/2025/03/default-thumbnail.jpg 640w, https://toan123.vn/wp-content/uploads/2025/03/default-thumbnail-300x225.jpg 300w" sizes="auto, (max-width: 640px) 100vw, 640px" /> </a>
</div>
</div>
<div class="box-text text-left" >
<div class="box-text-inner blog-post-inner">

<p class="cat-label is-xxsmall op-7 uppercase">
Tin tức </p>
<h5 class="post-title is-large ">
<a href="https://toan123.vn/tin-tuc/ty-le-keo-nha-cai/" class="plain">Tỷ Lệ Kèo Nhà Cái – Cẩm Nang Cá Cược Người Chơi Nên Biết</a>
</h5>
<div class="is-divider"></div>

</div>
</div>
</div>
</div>
</div></div>
</div>
</div>

</div>

</div>
</div>
</div>
</div>

</main>

<footer id="footer" class="footer-wrapper">

<section class="section" id="section_1585327095">
<div class="section-bg fill" >

</div>

<div class="section-content relative">

<div id="gap-123394346" class="gap-element clearfix" style="display:block; height:auto;">

<style>
#gap-123394346 {
padding-top: 35px;
}
</style>
</div>

<div class="row" id="row-1099419930">

<div id="col-1947396230" class="col medium-6 small-12 large-6" >
<div class="col-inner" >

<div id="text-3936948886" class="text">

<p>© Bản quyền <span style="color: #c0c0c0;"><a style="color: #c0c0c0;" href="https://toan123.vn/">Toan123.VN</a></span>. Tất cả quyền được bảo vệ</p>
<p><a href="https://www.emilywillinghamphd.com/">truc tiep bong da</a> - <a href="https://okvip.io/">okvip</a> - <a href="https://33win68.asia/">33win</a> - <a href="https://gk88254.com/"><span data-sheets-root="1">gk88</span></a></p>

<style>
#text-3936948886 {
font-size: 0.9rem;
color: rgb(146, 150, 160);
}
#text-3936948886 > * {
color: rgb(146, 150, 160);
}
</style>
</div>

</div>
</div>

<div id="col-1261937846" class="col medium-6 small-12 large-6" >
<div class="col-inner" >

<div id="text-1636843931" class="text">

<p><span style="color: #c0c0c0;"><a style="color: #c0c0c0;" href="https://toan123.vn/lien-he/">Liên hệ</a> | <a style="color: #c0c0c0;" href="https://toan123.vn/dieu-khoan-su-dung-dich-vu/">Điều khoản sử dụng dịch vụ</a></span></p>

<style>
#text-1636843931 {
font-size: 0.9rem;
text-align: right;
color: rgb(146, 150, 160);
}
#text-1636843931 > * {
color: rgb(146, 150, 160);
}
</style>
</div>

</div>
</div>

</div>

</div>

<style>
#section_1585327095 {
padding-top: 0px;
padding-bottom: 0px;
background-color: rgb(55, 63, 80);
}
</style>
</section>

<div class="absolute-footer dark medium-text-center small-text-center">
<div class="container clearfix">

<div class="footer-secondary pull-right">
<div class="footer-text inline-block small-block">
Liên hệ | Điều khoản sử dụng dịch vụ </div>
</div>

<div class="footer-primary pull-left">
<div class="copyright-footer">
© Bản quyền Toan123.VN. Tất cả quyền được bảo vệ </div>
</div>
</div>
</div>

<a href="#top" class="back-to-top button icon invert plain fixed bottom z-1 is-outline hide-for-medium circle" id="top-link" aria-label="Lên đầu trang"><i class="icon-angle-up" ></i></a>

</footer>

</div>

<div id="main-menu" class="mobile-sidebar no-scrollbar mfp-hide">

<div class="sidebar-menu no-scrollbar ">

<ul class="nav nav-sidebar nav-vertical nav-uppercase" data-tab="1">
<li class="header-search-form search-form html relative has-icon">
<div class="header-search-form-wrapper">
<div class="searchform-wrapper ux-search-box relative is-normal"><form method="get" class="searchform" action="https://toan123.vn/" role="search">
<div class="flex-row relative">
<div class="flex-col flex-grow">
<input type="search" class="search-field mb-0" name="s" value="" id="s" placeholder="Search…" />
</div>
<div class="flex-col">
<button type="submit" class="ux-search-submit submit-button secondary button icon mb-0" aria-label="Gửi">
<i class="icon-search" ></i> </button>
</div>
</div>
<div class="live-search-results text-left z-top"></div>
</form>
</div> </div>
</li>
<li class="menu-item menu-item-type-custom menu-item-object-custom current-menu-item current_page_item menu-item-6"><a href="/" aria-current="page">Trang chủ</a></li>
<li class="menu-item menu-item-type-custom menu-item-object-custom menu-item-7"><a href="#">Khóa học</a></li>
<li class="menu-item menu-item-type-custom menu-item-object-custom menu-item-8"><a href="#">Cộng đồng</a></li>
<li class="menu-item menu-item-type-taxonomy menu-item-object-category menu-item-10"><a href="https://toan123.vn/tai-lieu/">Tài Liệu</a></li>
<li class="menu-item menu-item-type-taxonomy menu-item-object-category menu-item-11"><a href="https://toan123.vn/tin-tuc/">Tin tức</a></li>
<li class="menu-item menu-item-type-custom menu-item-object-custom menu-item-12"><a href="#">Video</a></li>
</ul>

</div>

</div>
<script type="speculationrules">
{"prefetch":[{"source":"document","where":{"and":[{"href_matches":"\/*"},{"not":{"href_matches":["\/wp-*.php","\/wp-admin\/*","\/wp-content\/uploads\/*","\/wp-content\/*","\/wp-content\/plugins\/*","\/wp-content\/themes\/flatsome-child\/*","\/wp-content\/themes\/flatsome\/*","\/*\\?(.+)"]}},{"not":{"selector_matches":"a[rel~=\"nofollow\"]"}},{"not":{"selector_matches":".no-prefetch, .no-prefetch a"}}]},"eagerness":"conservative"}]}
</script>
<style id='global-styles-inline-css' type='text/css'>
:root{--wp--preset--aspect-ratio--square: 1;--wp--preset--aspect-ratio--4-3: 4/3;--wp--preset--aspect-ratio--3-4: 3/4;--wp--preset--aspect-ratio--3-2: 3/2;--wp--preset--aspect-ratio--2-3: 2/3;--wp--preset--aspect-ratio--16-9: 16/9;--wp--preset--aspect-ratio--9-16: 9/16;--wp--preset--color--black: #000000;--wp--preset--color--cyan-bluish-gray: #abb8c3;--wp--preset--color--white: #ffffff;--wp--preset--color--pale-pink: #f78da7;--wp--preset--color--vivid-red: #cf2e2e;--wp--preset--color--luminous-vivid-orange: #ff6900;--wp--preset--color--luminous-vivid-amber: #fcb900;--wp--preset--color--light-green-cyan: #7bdcb5;--wp--preset--color--vivid-green-cyan: #00d084;--wp--preset--color--pale-cyan-blue: #8ed1fc;--wp--preset--color--vivid-cyan-blue: #0693e3;--wp--preset--color--vivid-purple: #9b51e0;--wp--preset--color--primary: #136adc;--wp--preset--color--secondary: #fe6e6a;--wp--preset--color--success: #7a9c59;--wp--preset--color--alert: #b20000;--wp--preset--gradient--vivid-cyan-blue-to-vivid-purple: linear-gradient(135deg,rgba(6,147,227,1) 0%,rgb(155,81,224) 100%);--wp--preset--gradient--light-green-cyan-to-vivid-green-cyan: linear-gradient(135deg,rgb(122,220,180) 0%,rgb(0,208,130) 100%);--wp--preset--gradient--luminous-vivid-amber-to-luminous-vivid-orange: linear-gradient(135deg,rgba(252,185,0,1) 0%,rgba(255,105,0,1) 100%);--wp--preset--gradient--luminous-vivid-orange-to-vivid-red: linear-gradient(135deg,rgba(255,105,0,1) 0%,rgb(207,46,46) 100%);--wp--preset--gradient--very-light-gray-to-cyan-bluish-gray: linear-gradient(135deg,rgb(238,238,238) 0%,rgb(169,184,195) 100%);--wp--preset--gradient--cool-to-warm-spectrum: linear-gradient(135deg,rgb(74,234,220) 0%,rgb(151,120,209) 20%,rgb(207,42,186) 40%,rgb(238,44,130) 60%,rgb(251,105,98) 80%,rgb(254,248,76) 100%);--wp--preset--gradient--blush-light-purple: linear-gradient(135deg,rgb(255,206,236) 0%,rgb(152,150,240) 100%);--wp--preset--gradient--blush-bordeaux: linear-gradient(135deg,rgb(254,205,165) 0%,rgb(254,45,45) 50%,rgb(107,0,62) 100%);--wp--preset--gradient--luminous-dusk: linear-gradient(135deg,rgb(255,203,112) 0%,rgb(199,81,192) 50%,rgb(65,88,208) 100%);--wp--preset--gradient--pale-ocean: linear-gradient(135deg,rgb(255,245,203) 0%,rgb(182,227,212) 50%,rgb(51,167,181) 100%);--wp--preset--gradient--electric-grass: linear-gradient(135deg,rgb(202,248,128) 0%,rgb(113,206,126) 100%);--wp--preset--gradient--midnight: linear-gradient(135deg,rgb(2,3,129) 0%,rgb(40,116,252) 100%);--wp--preset--font-size--small: 13px;--wp--preset--font-size--medium: 20px;--wp--preset--font-size--large: 36px;--wp--preset--font-size--x-large: 42px;--wp--preset--spacing--20: 0.44rem;--wp--preset--spacing--30: 0.67rem;--wp--preset--spacing--40: 1rem;--wp--preset--spacing--50: 1.5rem;--wp--preset--spacing--60: 2.25rem;--wp--preset--spacing--70: 3.38rem;--wp--preset--spacing--80: 5.06rem;--wp--preset--shadow--natural: 6px 6px 9px rgba(0, 0, 0, 0.2);--wp--preset--shadow--deep: 12px 12px 50px rgba(0, 0, 0, 0.4);--wp--preset--shadow--sharp: 6px 6px 0px rgba(0, 0, 0, 0.2);--wp--preset--shadow--outlined: 6px 6px 0px -3px rgba(255, 255, 255, 1), 6px 6px rgba(0, 0, 0, 1);--wp--preset--shadow--crisp: 6px 6px 0px rgba(0, 0, 0, 1);}:where(body) { margin: 0; }.wp-site-blocks > .alignleft { float: left; margin-right: 2em; }.wp-site-blocks > .alignright { float: right; margin-left: 2em; }.wp-site-blocks > .aligncenter { justify-content: center; margin-left: auto; margin-right: auto; }:where(.is-layout-flex){gap: 0.5em;}:where(.is-layout-grid){gap: 0.5em;}.is-layout-flow > .alignleft{float: left;margin-inline-start: 0;margin-inline-end: 2em;}.is-layout-flow > .alignright{float: right;margin-inline-start: 2em;margin-inline-end: 0;}.is-layout-flow > .aligncenter{margin-left: auto !important;margin-right: auto !important;}.is-layout-constrained > .alignleft{float: left;margin-inline-start: 0;margin-inline-end: 2em;}.is-layout-constrained > .alignright{float: right;margin-inline-start: 2em;margin-inline-end: 0;}.is-layout-constrained > .aligncenter{margin-left: auto !important;margin-right: auto !important;}.is-layout-constrained > :where(:not(.alignleft):not(.alignright):not(.alignfull)){margin-left: auto !important;margin-right: auto !important;}body .is-layout-flex{display: flex;}.is-layout-flex{flex-wrap: wrap;align-items: center;}.is-layout-flex > :is(*, div){margin: 0;}body .is-layout-grid{display: grid;}.is-layout-grid > :is(*, div){margin: 0;}body{padding-top: 0px;padding-right: 0px;padding-bottom: 0px;padding-left: 0px;}a:where(:not(.wp-element-button)){text-decoration: none;}:root :where(.wp-element-button, .wp-block-button__link){background-color: #32373c;border-width: 0;color: #fff;font-family: inherit;font-size: inherit;line-height: inherit;padding: calc(0.667em + 2px) calc(1.333em + 2px);text-decoration: none;}.has-black-color{color: var(--wp--preset--color--black) !important;}.has-cyan-bluish-gray-color{color: var(--wp--preset--color--cyan-bluish-gray) !important;}.has-white-color{color: var(--wp--preset--color--white) !important;}.has-pale-pink-color{color: var(--wp--preset--color--pale-pink) !important;}.has-vivid-red-color{color: var(--wp--preset--color--vivid-red) !important;}.has-luminous-vivid-orange-color{color: var(--wp--preset--color--luminous-vivid-orange) !important;}.has-luminous-vivid-amber-color{color: var(--wp--preset--color--luminous-vivid-amber) !important;}.has-light-green-cyan-color{color: var(--wp--preset--color--light-green-cyan) !important;}.has-vivid-green-cyan-color{color: var(--wp--preset--color--vivid-green-cyan) !important;}.has-pale-cyan-blue-color{color: var(--wp--preset--color--pale-cyan-blue) !important;}.has-vivid-cyan-blue-color{color: var(--wp--preset--color--vivid-cyan-blue) !important;}.has-vivid-purple-color{color: var(--wp--preset--color--vivid-purple) !important;}.has-primary-color{color: var(--wp--preset--color--primary) !important;}.has-secondary-color{color: var(--wp--preset--color--secondary) !important;}.has-success-color{color: var(--wp--preset--color--success) !important;}.has-alert-color{color: var(--wp--preset--color--alert) !important;}.has-black-background-color{background-color: var(--wp--preset--color--black) !important;}.has-cyan-bluish-gray-background-color{background-color: var(--wp--preset--color--cyan-bluish-gray) !important;}.has-white-background-color{background-color: var(--wp--preset--color--white) !important;}.has-pale-pink-background-color{background-color: var(--wp--preset--color--pale-pink) !important;}.has-vivid-red-background-color{background-color: var(--wp--preset--color--vivid-red) !important;}.has-luminous-vivid-orange-background-color{background-color: var(--wp--preset--color--luminous-vivid-orange) !important;}.has-luminous-vivid-amber-background-color{background-color: var(--wp--preset--color--luminous-vivid-amber) !important;}.has-light-green-cyan-background-color{background-color: var(--wp--preset--color--light-green-cyan) !important;}.has-vivid-green-cyan-background-color{background-color: var(--wp--preset--color--vivid-green-cyan) !important;}.has-pale-cyan-blue-background-color{background-color: var(--wp--preset--color--pale-cyan-blue) !important;}.has-vivid-cyan-blue-background-color{background-color: var(--wp--preset--color--vivid-cyan-blue) !important;}.has-vivid-purple-background-color{background-color: var(--wp--preset--color--vivid-purple) !important;}.has-primary-background-color{background-color: var(--wp--preset--color--primary) !important;}.has-secondary-background-color{background-color: var(--wp--preset--color--secondary) !important;}.has-success-background-color{background-color: var(--wp--preset--color--success) !important;}.has-alert-background-color{background-color: var(--wp--preset--color--alert) !important;}.has-black-border-color{border-color: var(--wp--preset--color--black) !important;}.has-cyan-bluish-gray-border-color{border-color: var(--wp--preset--color--cyan-bluish-gray) !important;}.has-white-border-color{border-color: var(--wp--preset--color--white) !important;}.has-pale-pink-border-color{border-color: var(--wp--preset--color--pale-pink) !important;}.has-vivid-red-border-color{border-color: var(--wp--preset--color--vivid-red) !important;}.has-luminous-vivid-orange-border-color{border-color: var(--wp--preset--color--luminous-vivid-orange) !important;}.has-luminous-vivid-amber-border-color{border-color: var(--wp--preset--color--luminous-vivid-amber) !important;}.has-light-green-cyan-border-color{border-color: var(--wp--preset--color--light-green-cyan) !important;}.has-vivid-green-cyan-border-color{border-color: var(--wp--preset--color--vivid-green-cyan) !important;}.has-pale-cyan-blue-border-color{border-color: var(--wp--preset--color--pale-cyan-blue) !important;}.has-vivid-cyan-blue-border-color{border-color: var(--wp--preset--color--vivid-cyan-blue) !important;}.has-vivid-purple-border-color{border-color: var(--wp--preset--color--vivid-purple) !important;}.has-primary-border-color{border-color: var(--wp--preset--color--primary) !important;}.has-secondary-border-color{border-color: var(--wp--preset--color--secondary) !important;}.has-success-border-color{border-color: var(--wp--preset--color--success) !important;}.has-alert-border-color{border-color: var(--wp--preset--color--alert) !important;}.has-vivid-cyan-blue-to-vivid-purple-gradient-background{background: var(--wp--preset--gradient--vivid-cyan-blue-to-vivid-purple) !important;}.has-light-green-cyan-to-vivid-green-cyan-gradient-background{background: var(--wp--preset--gradient--light-green-cyan-to-vivid-green-cyan) !important;}.has-luminous-vivid-amber-to-luminous-vivid-orange-gradient-background{background: var(--wp--preset--gradient--luminous-vivid-amber-to-luminous-vivid-orange) !important;}.has-luminous-vivid-orange-to-vivid-red-gradient-background{background: var(--wp--preset--gradient--luminous-vivid-orange-to-vivid-red) !important;}.has-very-light-gray-to-cyan-bluish-gray-gradient-background{background: var(--wp--preset--gradient--very-light-gray-to-cyan-bluish-gray) !important;}.has-cool-to-warm-spectrum-gradient-background{background: var(--wp--preset--gradient--cool-to-warm-spectrum) !important;}.has-blush-light-purple-gradient-background{background: var(--wp--preset--gradient--blush-light-purple) !important;}.has-blush-bordeaux-gradient-background{background: var(--wp--preset--gradient--blush-bordeaux) !important;}.has-luminous-dusk-gradient-background{background: var(--wp--preset--gradient--luminous-dusk) !important;}.has-pale-ocean-gradient-background{background: var(--wp--preset--gradient--pale-ocean) !important;}.has-electric-grass-gradient-background{background: var(--wp--preset--gradient--electric-grass) !important;}.has-midnight-gradient-background{background: var(--wp--preset--gradient--midnight) !important;}.has-small-font-size{font-size: var(--wp--preset--font-size--small) !important;}.has-medium-font-size{font-size: var(--wp--preset--font-size--medium) !important;}.has-large-font-size{font-size: var(--wp--preset--font-size--large) !important;}.has-x-large-font-size{font-size: var(--wp--preset--font-size--x-large) !important;}
</style>
<script type="text/javascript" src="https://toan123.vn/wp-content/themes/flatsome/inc/extensions/flatsome-live-search/flatsome-live-search.js?ver=3.19.7" id="flatsome-live-search-js"></script>
<script type="text/javascript" src="https://toan123.vn/wp-includes/js/hoverIntent.min.js?ver=1.10.2" id="hoverIntent-js"></script>
<script type="text/javascript" id="flatsome-js-js-extra">
/* <![CDATA[ */
var flatsomeVars = {"theme":{"version":"3.19.7"},"ajaxurl":"https:\/\/toan123.vn\/wp-admin\/admin-ajax.php","rtl":"","sticky_height":"70","stickyHeaderHeight":"0","scrollPaddingTop":"0","assets_url":"https:\/\/toan123.vn\/wp-content\/themes\/flatsome\/assets\/","lightbox":{"close_markup":"<button title=\"%title%\" type=\"button\" class=\"mfp-close\"><svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"28\" height=\"28\" viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\" stroke-linecap=\"round\" stroke-linejoin=\"round\" class=\"feather feather-x\"><line x1=\"18\" y1=\"6\" x2=\"6\" y2=\"18\"><\/line><line x1=\"6\" y1=\"6\" x2=\"18\" y2=\"18\"><\/line><\/svg><\/button>","close_btn_inside":false},"user":{"can_edit_pages":false},"i18n":{"mainMenu":"Menu ch\u00ednh","toggleButton":"Chuy\u1ec3n \u0111\u1ed5i"},"options":{"cookie_notice_version":"1","swatches_layout":false,"swatches_disable_deselect":false,"swatches_box_select_event":false,"swatches_box_behavior_selected":false,"swatches_box_update_urls":"1","swatches_box_reset":false,"swatches_box_reset_limited":false,"swatches_box_reset_extent":false,"swatches_box_reset_time":300,"search_result_latency":"0"}};
/* ]]> */
</script>
<script type="text/javascript" src="https://toan123.vn/wp-content/themes/flatsome/assets/js/flatsome.js?ver=8e60d746741250b4dd4e" id="flatsome-js-js"></script>
<script type="text/javascript" src="https://cdnjs.cloudflare.com/ajax/libs/mathjax/2.7.9/MathJax.js?config=default&ver=1.3.13" id="mathjax-js"></script>

</body>
</html>

toan123.vn Ads.txt file

Ads.Txt Alerts - A trading name of Red Volcano Limited Waterloo Buildings, Second Floor Rear, 53 London Road, Southampton, Hampshire, United Kingdom, SO15 2AD Contact ⋅ Sites ⋅ Terms of Use ⋅ Privacy Policy © Red Volcano 2020. All Rights Reserved.

Ads.Txt Alerts - A trading name of Red Volcano Limited

Waterloo Buildings, Second Floor Rear, 53 London Road, Southampton, Hampshire, United Kingdom, SO15 2AD

Contact

⋅

Sites

⋅

Terms of Use

⋅

Privacy Policy

© Red Volcano 2020. All Rights Reserved.