{"id":38016,"date":"2026-09-27T15:17:16","date_gmt":"2026-09-27T13:17:16","guid":{"rendered":"https:\/\/ludorex.com\/?p=38016"},"modified":"2026-09-27T15:18:24","modified_gmt":"2026-09-27T13:18:24","slug":"boi-so-cua-3","status":"publish","type":"post","link":"https:\/\/ludorex.com\/vi\/tro-choi\/boi-so-cua-3","title":{"rendered":"B\u1ed9i s\u1ed1 c\u1ee7a 3: \u0111\u1ed1 vui b\u1ea3ng c\u1eedu ch\u01b0\u01a1ng 3"},"content":{"rendered":"<div data-elementor-type=\"wp-post\" data-elementor-id=\"38016\" class=\"elementor elementor-38016\" data-elementor-post-type=\"post\">\n\t\t\t\t<div class=\"elementor-element elementor-element-2b6d5809 e-flex e-con-boxed e-con e-parent\" data-id=\"2b6d5809\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-51b9df9 elementor-widget elementor-widget-spacer\" data-id=\"51b9df9\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"spacer.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"elementor-spacer\">\n\t\t\t<div class=\"elementor-spacer-inner\"><\/div>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-36e44969 e-con-full e-flex e-con e-parent\" data-id=\"36e44969\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t<div class=\"elementor-element elementor-element-42b16f56 e-con-full e-flex e-con e-child\" data-id=\"42b16f56\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t<div class=\"elementor-element elementor-element-387d4e4c e-con-full e-flex e-con e-child\" data-id=\"387d4e4c\" data-element_type=\"container\" data-e-type=\"container\" data-settings=\"{&quot;background_background&quot;:&quot;video&quot;,&quot;background_video_start&quot;:0,&quot;background_video_end&quot;:10,&quot;background_play_on_mobile&quot;:&quot;yes&quot;,&quot;background_privacy_mode&quot;:&quot;yes&quot;}\">\n\t\t\t\t<div class=\"elementor-element elementor-element-25e1d305 elementor-widget elementor-widget-image\" data-id=\"25e1d305\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img decoding=\"async\" width=\"150\" height=\"150\" src=\"https:\/\/ludorex.com\/wp-content\/uploads\/2026\/09\/multiplos-de-3.jpg\" class=\"attachment-thumbnail size-thumbnail wp-image-38012\" alt=\"C\u00e2u h\u1ecfi to\u00e1n \u201c? \u00f7 3 = 3\u201d tr\u00ean n\u1ec1n \u0111en v\u1edbi hai l\u1ef1a ch\u1ecdn \u0111\u00e1p \u00e1n l\u00e0 6 v\u00e0 9, trong \u0111\u00f3 9 \u0111\u01b0\u1ee3c \u0111\u00e1nh d\u1ea5u m\u00e0u xanh l\u00e0 \u0111\u00e1p \u00e1n \u0111\u00fang.\" srcset=\"https:\/\/ludorex.com\/wp-content\/uploads\/2026\/09\/multiplos-de-3.jpg 150w, https:\/\/ludorex.com\/wp-content\/uploads\/2026\/09\/multiplos-de-3-12x12.jpg 12w, https:\/\/ludorex.com\/wp-content\/uploads\/2026\/09\/multiplos-de-3-40x40.jpg 40w, https:\/\/ludorex.com\/wp-content\/uploads\/2026\/09\/multiplos-de-3-64x64.jpg 64w, https:\/\/ludorex.com\/wp-content\/uploads\/2026\/09\/multiplos-de-3-24x24.jpg 24w, https:\/\/ludorex.com\/wp-content\/uploads\/2026\/09\/multiplos-de-3-36x36.jpg 36w, https:\/\/ludorex.com\/wp-content\/uploads\/2026\/09\/multiplos-de-3-48x48.jpg 48w\" sizes=\"(max-width: 150px) 100vw, 150px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-4a496156 elementor-widget elementor-widget-icon-box\" data-id=\"4a496156\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"icon-box.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"elementor-icon-box-wrapper\">\n\n\t\t\t\n\t\t\t\t\t\t<div class=\"elementor-icon-box-content\">\n\n\t\t\t\t\t\t\t\t\t<h1 class=\"elementor-icon-box-title\">\n\t\t\t\t\t\t<span  >\n\t\t\t\t\t\t\tB\u1ed9i s\u1ed1 c\u1ee7a 3: \u0111\u1ed1 vui b\u1ea3ng c\u1eedu ch\u01b0\u01a1ng 3\t\t\t\t\t\t<\/span>\n\t\t\t\t\t<\/h1>\n\t\t\t\t\n\t\t\t\t\n\t\t\t<\/div>\n\t\t\t\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-65c6db6a elementor-align-center elementor-mobile-align-center elementor-widget elementor-widget-button\" data-id=\"65c6db6a\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"button.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<div class=\"elementor-button-wrapper\">\n\t\t\t\t\t<a class=\"elementor-button elementor-button-link elementor-size-md\" href=\"#elementor-action%3Aaction%3Dpopup%3Aopen%26settings%3DeyJpZCI6IjM4MDE0IiwidG9nZ2xlIjpmYWxzZX0%3D\" rel=\"nofollow\" id=\"btnFullscreen\">\n\t\t\t\t\t\t<span class=\"elementor-button-content-wrapper\">\n\t\t\t\t\t\t<span class=\"elementor-button-icon\">\n\t\t\t\t<svg aria-hidden=\"true\" class=\"e-font-icon-svg e-fas-play\" viewbox=\"0 0 448 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M424.4 214.7L72.4 6.6C43.8-10.3 0 6.1 0 47.9V464c0 37.5 40.7 60.1 72.4 41.3l352-208c31.4-18.5 31.5-64.1 0-82.6z\"><\/path><\/svg>\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t<span class=\"elementor-button-text\">Ch\u01a1i<\/span>\n\t\t\t\t\t<\/span>\n\t\t\t\t\t<\/a>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-6b5a5db0 e-con-full e-flex e-con e-child\" data-id=\"6b5a5db0\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-757cc055 e-flex e-con-boxed e-con e-parent\" data-id=\"757cc055\" data-element_type=\"container\" data-e-type=\"container\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t<div class=\"elementor-element elementor-element-39e54949 e-con-full e-flex e-con e-child\" data-id=\"39e54949\" data-element_type=\"container\" data-e-type=\"container\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t\t<div class=\"elementor-element elementor-element-290f63f0 elementor-widget elementor-widget-icon-box\" data-id=\"290f63f0\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"icon-box.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"elementor-icon-box-wrapper\">\n\n\t\t\t\n\t\t\t\t\t\t<div class=\"elementor-icon-box-content\">\n\n\t\t\t\t\t\t\t\t\t<p class=\"elementor-icon-box-title\">\n\t\t\t\t\t\t<span  >\n\t\t\t\t\t\t\tB\u1ed9i s\u1ed1 c\u1ee7a 3: \u0111\u1ed1 vui b\u1ea3ng c\u1eedu ch\u01b0\u01a1ng 3\t\t\t\t\t\t<\/span>\n\t\t\t\t\t<\/p>\n\t\t\t\t\n\t\t\t\t\n\t\t\t<\/div>\n\t\t\t\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-561f13f7 e-con-full e-flex e-con e-child\" data-id=\"561f13f7\" data-element_type=\"container\" data-e-type=\"container\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<main class=\"elementor-element elementor-element-4933ecd2 e-flex e-con-boxed e-con e-parent\" data-id=\"4933ecd2\" data-element_type=\"container\" data-e-type=\"container\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t<div class=\"elementor-element elementor-element-1adc315 e-con-full e-flex e-con e-child\" data-id=\"1adc315\" data-element_type=\"container\" data-e-type=\"container\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t\t<div class=\"elementor-element elementor-element-e7abcd9 elementor-widget elementor-widget-breadcrumbs\" data-id=\"e7abcd9\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"breadcrumbs.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<p id=\"breadcrumbs\"><span><span><a href=\"https:\/\/ludorex.com\/vi\">Tr\u00f2 ch\u01a1i<\/a><\/span><\/span><\/p>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-2214f91c elementor-share-buttons--view-icon elementor-share-buttons--shape-circle elementor-share-buttons--skin-gradient elementor-grid-0 elementor-share-buttons--color-official elementor-widget elementor-widget-share-buttons\" data-id=\"2214f91c\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"share-buttons.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"elementor-grid\" role=\"list\">\n\t\t\t\t\t\t\t\t<div class=\"elementor-grid-item\" role=\"listitem\">\n\t\t\t\t\t\t<div class=\"elementor-share-btn elementor-share-btn_facebook\" role=\"button\" tabindex=\"0\" aria-label=\"Share on facebook\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-share-btn__icon\">\n\t\t\t\t\t\t\t\t<svg aria-hidden=\"true\" class=\"e-font-icon-svg e-fab-facebook\" viewbox=\"0 0 512 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M504 256C504 119 393 8 256 8S8 119 8 256c0 123.78 90.69 226.38 209.25 245V327.69h-63V256h63v-54.64c0-62.15 37-96.48 93.67-96.48 27.14 0 55.52 4.84 55.52 4.84v61h-31.28c-30.8 0-40.41 19.12-40.41 38.73V256h68.78l-11 71.69h-57.78V501C413.31 482.38 504 379.78 504 256z\"><\/path><\/svg>\t\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t<div class=\"elementor-grid-item\" role=\"listitem\">\n\t\t\t\t\t\t<div class=\"elementor-share-btn elementor-share-btn_whatsapp\" role=\"button\" tabindex=\"0\" aria-label=\"Share on whatsapp\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-share-btn__icon\">\n\t\t\t\t\t\t\t\t<svg aria-hidden=\"true\" class=\"e-font-icon-svg e-fab-whatsapp\" viewbox=\"0 0 448 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M380.9 97.1C339 55.1 283.2 32 223.9 32c-122.4 0-222 99.6-222 222 0 39.1 10.2 77.3 29.6 111L0 480l117.7-30.9c32.4 17.7 68.9 27 106.1 27h.1c122.3 0 224.1-99.6 224.1-222 0-59.3-25.2-115-67.1-157zm-157 341.6c-33.2 0-65.7-8.9-94-25.7l-6.7-4-69.8 18.3L72 359.2l-4.4-7c-18.5-29.4-28.2-63.3-28.2-98.2 0-101.7 82.8-184.5 184.6-184.5 49.3 0 95.6 19.2 130.4 54.1 34.8 34.9 56.2 81.2 56.1 130.5 0 101.8-84.9 184.6-186.6 184.6zm101.2-138.2c-5.5-2.8-32.8-16.2-37.9-18-5.1-1.9-8.8-2.8-12.5 2.8-3.7 5.6-14.3 18-17.6 21.8-3.2 3.7-6.5 4.2-12 1.4-32.6-16.3-54-29.1-75.5-66-5.7-9.8 5.7-9.1 16.3-30.3 1.8-3.7.9-6.9-.5-9.7-1.4-2.8-12.5-30.1-17.1-41.2-4.5-10.8-9.1-9.3-12.5-9.5-3.2-.2-6.9-.2-10.6-.2-3.7 0-9.7 1.4-14.8 6.9-5.1 5.6-19.4 19-19.4 46.3 0 27.3 19.9 53.7 22.6 57.4 2.8 3.7 39.1 59.7 94.8 83.8 35.2 15.2 49 16.5 66.6 13.9 10.7-1.6 32.8-13.4 37.4-26.4 4.6-13 4.6-24.1 3.2-26.4-1.3-2.5-5-3.9-10.5-6.6z\"><\/path><\/svg>\t\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t<div class=\"elementor-grid-item\" role=\"listitem\">\n\t\t\t\t\t\t<div class=\"elementor-share-btn elementor-share-btn_x-twitter\" role=\"button\" tabindex=\"0\" aria-label=\"Share on x-twitter\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-share-btn__icon\">\n\t\t\t\t\t\t\t\t<svg aria-hidden=\"true\" class=\"e-font-icon-svg e-fab-x-twitter\" viewbox=\"0 0 512 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M389.2 48h70.6L305.6 224.2 487 464H345L233.7 318.6 106.5 464H35.8L200.7 275.5 26.8 48H172.4L272.9 180.9 389.2 48zM364.4 421.8h39.1L151.1 88h-42L364.4 421.8z\"><\/path><\/svg>\t\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t<div class=\"elementor-grid-item\" role=\"listitem\">\n\t\t\t\t\t\t<div class=\"elementor-share-btn elementor-share-btn_reddit\" role=\"button\" tabindex=\"0\" aria-label=\"Share on reddit\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-share-btn__icon\">\n\t\t\t\t\t\t\t\t<svg aria-hidden=\"true\" class=\"e-font-icon-svg e-fab-reddit\" viewbox=\"0 0 512 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M201.5 305.5c-13.8 0-24.9-11.1-24.9-24.6 0-13.8 11.1-24.9 24.9-24.9 13.6 0 24.6 11.1 24.6 24.9 0 13.6-11.1 24.6-24.6 24.6zM504 256c0 137-111 248-248 248S8 393 8 256 119 8 256 8s248 111 248 248zm-132.3-41.2c-9.4 0-17.7 3.9-23.8 10-22.4-15.5-52.6-25.5-86.1-26.6l17.4-78.3 55.4 12.5c0 13.6 11.1 24.6 24.6 24.6 13.8 0 24.9-11.3 24.9-24.9s-11.1-24.9-24.9-24.9c-9.7 0-18 5.8-22.1 13.8l-61.2-13.6c-3-.8-6.1 1.4-6.9 4.4l-19.1 86.4c-33.2 1.4-63.1 11.3-85.5 26.8-6.1-6.4-14.7-10.2-24.1-10.2-34.9 0-46.3 46.9-14.4 62.8-1.1 5-1.7 10.2-1.7 15.5 0 52.6 59.2 95.2 132 95.2 73.1 0 132.3-42.6 132.3-95.2 0-5.3-.6-10.8-1.9-15.8 31.3-16 19.8-62.5-14.9-62.5zM302.8 331c-18.2 18.2-76.1 17.9-93.6 0-2.2-2.2-6.1-2.2-8.3 0-2.5 2.5-2.5 6.4 0 8.6 22.8 22.8 87.3 22.8 110.2 0 2.5-2.2 2.5-6.1 0-8.6-2.2-2.2-6.1-2.2-8.3 0zm7.7-75c-13.6 0-24.6 11.1-24.6 24.9 0 13.6 11.1 24.6 24.6 24.6 13.8 0 24.9-11.1 24.9-24.6 0-13.8-11-24.9-24.9-24.9z\"><\/path><\/svg>\t\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-4ca34cff elementor-widget elementor-widget-text-editor\" data-id=\"4ca34cff\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<h2>V\u1ec1 Tr\u00f2 Ch\u01a1i<\/h2><p>V\u1edbi tr\u00f2 \u0111\u1ed1 vui v\u1ec1 <strong>b\u1ed9i s\u1ed1 c\u1ee7a 3<\/strong> n\u00e0y, b\u1ea3ng c\u1eedu ch\u01b0\u01a1ng 3 \u0111\u01b0\u1ee3c luy\u1ec7n theo chi\u1ec1u ng\u01b0\u1ee3c: m\u1ed7i c\u00e2u h\u1ecfi c\u00f3 d\u1ea1ng <strong>? \u00f7 3 = s\u1ed1<\/strong> v\u00e0 b\u1ea1n ph\u1ea3i ch\u1ecdn gi\u00e1 tr\u1ecb c\u00f2n thi\u1ebfu. V\u00ed d\u1ee5, n\u1ebfu th\u1ea5y \u201c? \u00f7 3 = 3\u201d, \u0111\u00e1p \u00e1n l\u00e0 9, v\u00ec 3 \u00d7 3 = 9. Nh\u1edd v\u1eady, tr\u1ebb hi\u1ec3u r\u1eb1ng ph\u00e9p nh\u00e2n v\u00e0 ph\u00e9p chia l\u00e0 hai m\u1eb7t c\u1ee7a c\u00f9ng m\u1ed9t ph\u00e9p t\u00ednh. \u0110\u00e2y l\u00e0 ph\u1ea7n b\u1ed5 tr\u1ee3 t\u1ed1t cho c\u00e1c b\u00e0i t\u1eadp v\u1ec1 <span style=\"text-decoration: underline; color: #000080;\"><a style=\"color: #000080;\" href=\"https:\/\/ludorex.com\/vi\/tag\/bang-cuu-chuong-3\"><strong><span style=\"color: #000080; text-decoration: underline;\">b\u1ea3ng c\u1eedu ch\u01b0\u01a1ng 3<\/span><\/strong><\/a><\/span>, khi tr\u1ebb \u0111\u00e3 \u0111\u1ecdc thu\u1ed9c nh\u01b0ng v\u1eabn c\u00f2n l\u00fang t\u00fang khi v\u1eadn d\u1ee5ng.<\/p><p>C\u00e1c b\u1ed9i s\u1ed1 \u0111\u1ea7u ti\u00ean c\u1ee7a 3 l\u00e0 <strong>3, 6, 9, 12, 15, 18, 21, 24, 27 v\u00e0 30<\/strong>, v\u00e0 t\u1ea5t c\u1ea3 \u0111\u1ec1u \u1ea9n ch\u1ee9a m\u1ed9t quy lu\u1eadt th\u00fa v\u1ecb m\u00e0 ch\u00fang t\u00f4i s\u1ebd k\u1ec3 \u1edf b\u00ean d\u01b0\u1edbi.<\/p>\n<h2>Ch\u01a1i B\u1ed9i s\u1ed1 c\u1ee7a 3 nh\u01b0 th\u1ebf n\u00e0o?<\/h2><p>Tr\u00f2 ch\u01a1i ho\u1ea1t \u0111\u1ed9ng nh\u01b0 m\u1ed9t gameshow truy\u1ec1n h\u00ecnh. M\u1ed9t ph\u00e9p chia xu\u1ea5t hi\u1ec7n v\u1edbi s\u1ed1 b\u1ecb chia \u0111\u01b0\u1ee3c gi\u1ea5u \u0111i, c\u00f9ng nhi\u1ec1u \u00f4 ch\u1ee9a c\u00e1c \u0111\u00e1p \u00e1n c\u00f3 th\u1ec3. H\u00e3y nh\u1ea5n v\u00e0o \u00f4 b\u1ea1n cho l\u00e0 \u0111\u00fang: n\u1ebfu \u0111\u00fang, \u00f4 s\u1ebd chuy\u1ec3n sang m\u00e0u xanh v\u00e0 b\u1ea1n \u0111\u01b0\u1ee3c c\u1ed9ng \u0111i\u1ec3m; n\u1ebfu sai, tr\u00f2 ch\u01a1i s\u1ebd b\u00e1o cho b\u1ea1n v\u00e0 chuy\u1ec3n sang c\u00e2u ti\u1ebfp theo.<\/p>\n<h2>\u0110i\u1ec1u khi\u1ec3n<\/h2><h3>PC<\/h3><ul><li><strong>Nh\u1ea5p chu\u1ed9t:<\/strong> <strong>ch\u1ecdn \u0111\u00e1p \u00e1n<\/strong><\/li><\/ul><h3>\u0110i\u1ec7n tho\u1ea1i v\u00e0 m\u00e1y t\u00ednh b\u1ea3ng<\/h3><ul><li><strong>Ch\u1ea1m m\u00e0n h\u00ecnh:<\/strong> <strong>ch\u1ecdn \u00f4 \u0111\u00fang<\/strong><\/li><\/ul>\n<h2>H\u1ecdc \u0111\u01b0\u1ee3c g\u00ec?<\/h2><ul><li>Nh\u1eadn bi\u1ebft m\u1ed9t s\u1ed1 c\u00f3 ph\u1ea3i l\u00e0 <strong>b\u1ed9i s\u1ed1 c\u1ee7a 3<\/strong> hay kh\u00f4ng.<\/li><li>Li\u00ean h\u1ec7 <strong>b\u1ea3ng c\u1eedu ch\u01b0\u01a1ng 3<\/strong> v\u1edbi <strong>ph\u00e9p chia cho 3<\/strong>.<\/li><li>Nhanh nh\u1ea1y trong <strong>t\u00ednh nh\u1ea9m<\/strong> v\u1edbi k\u1ebft qu\u1ea3 \u0111\u1ebfn 30.<\/li><li>L\u00e0m quen l\u1ea7n \u0111\u1ea7u v\u1edbi <strong>d\u1ea5u hi\u1ec7u chia h\u1ebft<\/strong>.<\/li><\/ul><p>Khuy\u1ebfn ngh\u1ecb t\u1eeb 7 tu\u1ed5i, \u0111\u1eb7c bi\u1ec7t cho h\u1ecdc sinh l\u1edbp 2 v\u00e0 l\u1edbp 3.<\/p>\n<h2>M\u1eb9o \u0111\u1ec3 ch\u01a1i t\u1ed1t h\u01a1n<\/h2><ul><li><strong>M\u1eb9o t\u1ed5ng c\u00e1c ch\u1eef s\u1ed1:<\/strong> m\u1ed9t s\u1ed1 l\u00e0 b\u1ed9i s\u1ed1 c\u1ee7a 3 n\u1ebfu t\u1ed5ng c\u00e1c ch\u1eef s\u1ed1 c\u1ee7a n\u00f3 c\u0169ng l\u00e0 b\u1ed9i s\u1ed1 c\u1ee7a 3. 27 \u2192 2 + 7 = 9, \u0111\u00fang; 25 \u2192 2 + 5 = 7, kh\u00f4ng. M\u1eb9o n\u00e0y gi\u00fap b\u1ea1n lo\u1ea1i tr\u1eeb l\u1ef1a ch\u1ecdn ngay l\u1eadp t\u1ee9c.<\/li><li><strong>L\u1ebb, ch\u1eb5n, l\u1ebb\u2026:<\/strong> c\u00e1c b\u1ed9i s\u1ed1 c\u1ee7a 3 xen k\u1ebd l\u1ebb v\u00e0 ch\u1eb5n (3, 6, 9, 12, 15\u2026). N\u1ebfu \u0111\u00e1p \u00e1n ph\u1ea3i l\u00e0 3 \u00d7 4, h\u00e3y t\u00ecm m\u1ed9t s\u1ed1 ch\u1eb5n.<\/li><li><strong>Quy lu\u1eadt ch\u1eef s\u1ed1 cu\u1ed1i:<\/strong> trong m\u01b0\u1eddi b\u1ed9i s\u1ed1 \u0111\u1ea7u ti\u00ean c\u1ee7a 3, ch\u1eef s\u1ed1 cu\u1ed1i kh\u00f4ng bao gi\u1edd l\u1eb7p l\u1ea1i (3, 6, 9, 2, 5, 8, 1, 4, 7, 0). \u0110\u1ecdc to l\u00ean s\u1ebd gi\u00fap b\u1ea1n ghi nh\u1edb ch\u00fang.<\/li><li>N\u1ebfu b\u1ecb b\u00ed, h\u00e3y ngh\u0129 \u0111\u1ebfn g\u1ea5p ba: 3 \u00d7 6 l\u00e0 6 + 6 + 6 = 18.<\/li><\/ul>\n<h2>C\u00e2u h\u1ecfi th\u01b0\u1eddng g\u1eb7p<\/h2><h3>L\u00e0m sao bi\u1ebft m\u1ed9t s\u1ed1 c\u00f3 ph\u1ea3i l\u00e0 b\u1ed9i s\u1ed1 c\u1ee7a 3?<\/h3><p>H\u00e3y c\u1ed9ng c\u00e1c ch\u1eef s\u1ed1 c\u1ee7a n\u00f3: n\u1ebfu k\u1ebft qu\u1ea3 l\u00e0 3, 6, 9 ho\u1eb7c b\u1ea5t k\u1ef3 b\u1ed9i s\u1ed1 n\u00e0o kh\u00e1c c\u1ee7a 3 th\u00ec s\u1ed1 \u0111\u00f3 c\u0169ng v\u1eady. V\u00ed d\u1ee5, 111 l\u00e0 b\u1ed9i s\u1ed1 c\u1ee7a 3 v\u00ec 1 + 1 + 1 = 3.<\/p><h3>S\u1ed1 0 c\u00f3 ph\u1ea3i l\u00e0 b\u1ed9i s\u1ed1 c\u1ee7a 3 kh\u00f4ng?<\/h3><p>C\u00f3, v\u00ec 3 \u00d7 0 = 0. Th\u1ef1c ra, 0 l\u00e0 b\u1ed9i s\u1ed1 c\u1ee7a m\u1ecdi s\u1ed1, d\u00f9 \u1edf ti\u1ec3u h\u1ecdc danh s\u00e1ch th\u01b0\u1eddng b\u1eaft \u0111\u1ea7u t\u1eeb ch\u00ednh s\u1ed1 3.<\/p><h3>T\u1ea1i sao tr\u00f2 ch\u01a1i n\u00e0y d\u00f9ng ph\u00e9p chia thay v\u00ec ph\u00e9p nh\u00e2n?<\/h3><p>V\u00ec vi\u1ec7c t\u00ecm s\u1ed1 m\u00e0 khi chia cho 3 ra m\u1ed9t k\u1ebft qu\u1ea3 bu\u1ed9c b\u1ea1n ph\u1ea3i ngh\u0129 ng\u01b0\u1ee3c b\u1ea3ng c\u1eedu ch\u01b0\u01a1ng 3, v\u00e0 \u0111\u00f3 ch\u00ednh l\u00e0 \u0111i\u1ec1u c\u1ea7n thi\u1ebft sau n\u00e0y \u0111\u1ec3 gi\u1ea3i ph\u00e9p chia th\u00e0nh th\u1ea1o.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-a223bee elementor-widget elementor-widget-text-editor\" data-id=\"a223bee\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<h2>Th\u00f4ng tin b\u1ed5 sung<\/h2><p><strong>Th\u1ec3 lo\u1ea1i:<\/strong> Gi\u00e1o d\u1ee5c, to\u00e1n h\u1ecdc, \u0111\u1ed1 vui<br \/><strong>\u0110\u1ed9 tu\u1ed5i khuy\u1ebfn ngh\u1ecb:<\/strong> T\u1eeb 7 tu\u1ed5i (l\u1edbp 2 v\u00e0 l\u1edbp 3)<br \/><strong>C\u00f4ng ngh\u1ec7:<\/strong> HTML5<br \/><strong>N\u1ec1n t\u1ea3ng:<\/strong> Tr\u00ecnh duy\u1ec7t web (PC, m\u00e1y t\u00ednh b\u1ea3ng v\u00e0 \u0111i\u1ec7n tho\u1ea1i)<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-384aecb6 elementor-widget elementor-widget-heading\" data-id=\"384aecb6\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">C\u1eadp nh\u1eadt m\u1edbi nh\u1ea5t<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-343c4a31 elementor-align-left elementor-widget elementor-widget-post-info\" data-id=\"343c4a31\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"post-info.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<ul class=\"elementor-inline-items elementor-icon-list-items elementor-post-info\">\n\t\t\t\t\t\t\t\t<li class=\"elementor-icon-list-item elementor-repeater-item-228f13f elementor-inline-item\" itemprop=\"datePublished\">\n\t\t\t\t\t\t<a href=\"https:\/\/ludorex.com\/vi\/2026\/09\/27\">\n\t\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-icon-list-icon\">\n\t\t\t\t\t\t\t\t<svg aria-hidden=\"true\" class=\"e-font-icon-svg e-fas-calendar\" viewbox=\"0 0 448 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M12 192h424c6.6 0 12 5.4 12 12v260c0 26.5-21.5 48-48 48H48c-26.5 0-48-21.5-48-48V204c0-6.6 5.4-12 12-12zm436-44v-36c0-26.5-21.5-48-48-48h-48V12c0-6.6-5.4-12-12-12h-40c-6.6 0-12 5.4-12 12v52H160V12c0-6.6-5.4-12-12-12h-40c-6.6 0-12 5.4-12 12v52H48C21.5 64 0 85.5 0 112v36c0 6.6 5.4 12 12 12h424c6.6 0 12-5.4 12-12z\"><\/path><\/svg>\t\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t<span class=\"elementor-icon-list-text elementor-post-info__item elementor-post-info__item--type-date\">\n\t\t\t\t\t\t\t\t\t\t<time>27 th\u00e1ng 9, 2026<\/time>\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t<\/a>\n\t\t\t\t<\/li>\n\t\t\t\t<li class=\"elementor-icon-list-item elementor-repeater-item-4358513 elementor-inline-item\">\n\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-icon-list-icon\">\n\t\t\t\t\t\t\t\t<svg aria-hidden=\"true\" class=\"e-font-icon-svg e-far-clock\" viewbox=\"0 0 512 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M256 8C119 8 8 119 8 256s111 248 248 248 248-111 248-248S393 8 256 8zm0 448c-110.5 0-200-89.5-200-200S145.5 56 256 56s200 89.5 200 200-89.5 200-200 200zm61.8-104.4l-84.9-61.7c-3.1-2.3-4.9-5.9-4.9-9.7V116c0-6.6 5.4-12 12-12h32c6.6 0 12 5.4 12 12v141.7l66.8 48.6c5.4 3.9 6.5 11.4 2.6 16.8L334.6 349c-3.9 5.3-11.4 6.5-16.8 2.6z\"><\/path><\/svg>\t\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t<span class=\"elementor-icon-list-text elementor-post-info__item elementor-post-info__item--type-time\">\n\t\t\t\t\t\t\t\t\t\t<time>3:17 chi\u1ec1u<\/time>\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t<\/li>\n\t\t\t\t<\/ul>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-5fdb4504 elementor-widget elementor-widget-heading\" data-id=\"5fdb4504\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">T\u00e1c gi\u1ea3:<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-c4e71af elementor-author-box--avatar-yes elementor-author-box--name-yes elementor-author-box--biography-yes elementor-author-box--link-no elementor-widget elementor-widget-author-box\" data-id=\"c4e71af\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"author-box.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"elementor-author-box\">\n\t\t\t\t\t\t\t<a href=\"https:\/\/ludorex.com\/vi\/ve-toi\" target=\"_blank\" class=\"elementor-author-box__avatar\">\n\t\t\t\t\t<img decoding=\"async\" src=\"https:\/\/secure.gravatar.com\/avatar\/8ebb79153d837d98bee34a35135159df6b950eb623ae2f21bce22a5ff645bbdb?s=300&#038;d=wavatar&#038;r=g\" alt=\"Picture of Rub\u00e9n Cabra Zamora\" loading=\"lazy\">\n\t\t\t\t<\/a>\n\t\t\t\n\t\t\t<div class=\"elementor-author-box__text\">\n\t\t\t\t\t\t\t\t\t<a href=\"https:\/\/ludorex.com\/vi\/ve-toi\" target=\"_blank\">\n\t\t\t\t\t\t<span class=\"elementor-author-box__name\">\n\t\t\t\t\t\t\tRub\u00e9n Cabra Zamora\t\t\t\t\t\t<\/span>\n\t\t\t\t\t<\/a>\n\t\t\t\t\n\t\t\t\t\t\t\t\t\t<div class=\"elementor-author-box__bio\">\n\t\t\t\t\t\tNg\u01b0\u1eddi s\u00e1ng t\u1ea1o n\u1ed9i dung tr\u00f2 ch\u01a1i \u0111i\u1ec7n t\u1eed | Nh\u00e0 ph\u00e1t tri\u1ec3n web | Gi\u00e1m \u0111\u1ed1c \u0111i\u1ec1u h\u00e0nh Ludorex | Chuy\u00ean gia SEO &amp; AI t\u1ea1i Internet Rep\u00fablica. \u0110am m\u00ea c\u00f4ng ngh\u1ec7 v\u00e0 tr\u00f2 ch\u01a1i \u0111i\u1ec7n t\u1eed, \u0111\u1ed3ng th\u1eddi cam k\u1ebft gi\u00fap c\u00e1c doanh nghi\u1ec7p ph\u00e1t tri\u1ec3n m\u1ea1nh m\u1ebd trong th\u1ebf gi\u1edbi k\u1ef9 thu\u1eadt s\u1ed1.\t\t\t\t\t<\/div>\n\t\t\t\t\n\t\t\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-7bc19b8f e-con-full elementor-hidden-mobile e-flex e-con e-child\" data-id=\"7bc19b8f\" data-element_type=\"container\" data-e-type=\"container\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t\t<div class=\"elementor-element elementor-element-5247f91 elementor-widget elementor-widget-heading\" data-id=\"5247f91\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<span class=\"elementor-heading-title elementor-size-default\"><a href=\"https:\/\/ludorex.com\/vi\/tro-choi-nhieu-nguoi-choi\">Qu\u1ea3ng c\u00e1o<\/a><\/span>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-cba6447 elementor-widget elementor-widget-image\" data-id=\"cba6447\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<a href=\"https:\/\/track.wargaming-aff.com\/HZomQz\" target=\"_blank\" rel=\"nofollow\">\n\t\t\t\t\t\t\t<img decoding=\"async\" width=\"300\" height=\"600\" src=\"https:\/\/ludorex.com\/wp-content\/uploads\/2024\/08\/world-of-warships-banner.jpg\" class=\"attachment-full size-full wp-image-37175\" alt=\"\u00c1nh s\u00e1ng nh\u1ee3t nh\u1ea1t c\u1ee7a ho\u00e0ng h\u00f4n ph\u1ea3n chi\u1ebfu tr\u00ean nh\u1eefng con s\u00f3ng, gi\u1edd \u0111\u00e3 d\u1eef d\u1ed9i v\u00ec tr\u1eadn chi\u1ebfn. Nh\u1eefng chi\u1ebfc t\u00e0u ng\u1ea7m, nh\u01b0 b\u00f3ng ma th\u00e9p, len l\u1ecfi gi\u1eefa c\u00e1c ng\u1ecdn s\u00f3ng, th\u00e1p ph\u00e1o h\u01b0\u1edbng v\u1ec1 ph\u00eda ch\u00e2n tr\u1eddi. Ti\u1ebfng \u0111\u1ea1i b\u00e1c vang d\u1ed9i gi\u1eefa nh\u1eefng d\u00e3y n\u00fai s\u1eebng s\u1eefng ph\u00eda xa, nh\u1eefng nh\u00e2n ch\u1ee9ng c\u00e2m l\u1eb7ng c\u1ee7a c\u01a1n th\u1ecbnh n\u1ed9 b\u00f9ng ph\u00e1t. Ng\u01b0 l\u00f4i r\u1ebd n\u01b0\u1edbc, \u0111\u1ec3 l\u1ea1i nh\u1eefng v\u1ec7t bong b\u00f3ng h\u00f2a l\u1eabn v\u1edbi b\u1ecdt s\u00f3ng. 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Por [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":38012,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"yasr_overall_rating":0,"yasr_post_is_review":"","yasr_auto_insert_disabled":"","yasr_review_type":"","footnotes":""},"categories":[695,830,389,390],"tags":[864,879,878,842],"class_list":["post-38016","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-matematicas","category-tablas-de-multiplicar","category-ninos-de-7-a-8-anos","category-ninos-de-8-a-9-anos","tag-calculo-mental","tag-divisiones","tag-multiplicaciones","tag-tabla-del-3"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.2 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>M\u00faltiplos de 3: concurso de la tabla del 3 - Juegos Gratis Online<\/title>\n<meta name=\"description\" content=\"M\u00faltiplos de 3 en un concurso de preguntas: descubre qu\u00e9 n\u00famero dividido entre 3 da el resultado y domina la tabla del 3. \u00a1Juega gratis online!\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/ludorex.com\/vi\/tro-choi\/boi-so-cua-3\" \/>\n<meta property=\"og:locale\" content=\"vi_VN\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"M\u00faltiplos de 3: concurso de la tabla del 3 - Juegos Gratis Online\" \/>\n<meta property=\"og:description\" content=\"M\u00faltiplos de 3 en un concurso de preguntas: descubre qu\u00e9 n\u00famero dividido entre 3 da el resultado y domina la tabla del 3. \u00a1Juega gratis online!\" \/>\n<meta property=\"og:url\" content=\"https:\/\/ludorex.com\/vi\/tro-choi\/boi-so-cua-3\" \/>\n<meta property=\"og:site_name\" content=\"Juegos Gratis Online - Ludorex\" \/>\n<meta property=\"article:published_time\" content=\"2026-09-27T13:17:16+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2026-09-27T13:18:24+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/ludorex.com\/wp-content\/uploads\/2026\/09\/multiplos-de-3.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"150\" \/>\n\t<meta property=\"og:image:height\" content=\"150\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"author\" content=\"Rub\u00e9n Cabra Zamora\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:creator\" content=\"@https:\/\/x.com\/Ruben_Cabra\/\" \/>\n<meta name=\"twitter:label1\" content=\"\u0110\u01b0\u1ee3c vi\u1ebft b\u1edfi\" \/>\n\t<meta name=\"twitter:data1\" content=\"Rub\u00e9n Cabra Zamora\" \/>\n\t<meta name=\"twitter:label2\" content=\"\u01af\u1edbc t\u00ednh th\u1eddi gian \u0111\u1ecdc\" \/>\n\t<meta name=\"twitter:data2\" content=\"2 ph\u00fat\" \/>\n<!-- \/ Yoast SEO plugin. -->","yoast_head_json":{"title":"B\u1ed9i s\u1ed1 c\u1ee7a 3: \u0111\u1ed1 vui b\u1ea3ng c\u1eedu ch\u01b0\u01a1ng 3 - Tr\u00f2 ch\u01a1i tr\u1ef1c tuy\u1ebfn mi\u1ec5n ph\u00ed","description":"\u0110\u1ed1 vui b\u1ed9i s\u1ed1 c\u1ee7a 3: t\u00ecm s\u1ed1 chia cho 3 ra k\u1ebft qu\u1ea3 v\u00e0 l\u00e0m ch\u1ee7 b\u1ea3ng c\u1eedu ch\u01b0\u01a1ng 3. 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