{"id":18089,"date":"2025-07-06T01:40:05","date_gmt":"2025-07-05T18:40:05","guid":{"rendered":"https:\/\/www.ckconitsha.com\/vn\/?p=18089"},"modified":"2025-07-06T05:34:45","modified_gmt":"2025-07-05T22:34:45","slug":"huong-dan-cach-day-hoc-toan-lop-2-nhieu-hon-it-hon-don-gian-hieu-qua","status":"publish","type":"post","link":"https:\/\/www.ckconitsha.com\/vn\/huong-dan-cach-day-hoc-toan-lop-2-nhieu-hon-it-hon-don-gian-hieu-qua\/","title":{"rendered":"H\u01b0\u1edbng d\u1eabn c\u00e1ch d\u1ea1y h\u1ecdc to\u00e1n l\u1edbp 2 nhi\u1ec1u h\u01a1n \u00edt h\u01a1n \u0111\u01a1n gi\u1ea3n hi\u1ec7u qu\u1ea3"},"content":{"rendered":"<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_79_2 counter-hierarchy ez-toc-counter ez-toc-grey ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title\" style=\"cursor:inherit\">Table of Contents<\/p>\n<span class=\"ez-toc-title-toggle\"><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1 ' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/www.ckconitsha.com\/vn\/huong-dan-cach-day-hoc-toan-lop-2-nhieu-hon-it-hon-don-gian-hieu-qua\/#Toan_hoc_cap_2_it_hon\" >To\u00e1n h\u1ecdc c\u1ea5p 2 \u00edt h\u01a1n?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/www.ckconitsha.com\/vn\/huong-dan-cach-day-hoc-toan-lop-2-nhieu-hon-it-hon-don-gian-hieu-qua\/#Bao_nhieu_la_kho_khan_hoac_it_hon_khi_con_ban_hoc_toan\" >Bao nhi\u00eau l\u00e0 kh\u00f3 kh\u0103n ho\u1eb7c \u00edt h\u01a1n khi con b\u1ea1n h\u1ecdc to\u00e1n?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/www.ckconitsha.com\/vn\/huong-dan-cach-day-hoc-toan-lop-2-nhieu-hon-it-hon-don-gian-hieu-qua\/#Bi_quyet_de_giup_tre_hoc_toan_nhieu_hon_o_lop_2_nhieu_hon_it_hieu_qua_hon\" >B\u00ed quy\u1ebft \u0111\u1ec3 gi\u00fap tr\u1ebb h\u1ecdc to\u00e1n nhi\u1ec1u h\u01a1n \u1edf l\u1edbp 2 nhi\u1ec1u h\u01a1n, \u00edt hi\u1ec7u qu\u1ea3 h\u01a1n<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/www.ckconitsha.com\/vn\/huong-dan-cach-day-hoc-toan-lop-2-nhieu-hon-it-hon-don-gian-hieu-qua\/#Trang_bi_ung_dung_toan_hoc_khi_be_cua_ban\" >Trang b\u1ecb \u1ee9ng d\u1ee5ng to\u00e1n h\u1ecdc kh\u1ec9 b\u00e9 c\u1ee7a b\u1ea1n<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/www.ckconitsha.com\/vn\/huong-dan-cach-day-hoc-toan-lop-2-nhieu-hon-it-hon-don-gian-hieu-qua\/#Giup_con_ban_thanh_thao_kien_%E2%80%8B%E2%80%8Bthuc_toan_hoc_lop_2\" >Gi\u00fap con b\u1ea1n th\u00e0nh th\u1ea1o ki\u1ebfn \u200b\u200bth\u1ee9c to\u00e1n h\u1ecdc l\u1edbp 2<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/www.ckconitsha.com\/vn\/huong-dan-cach-day-hoc-toan-lop-2-nhieu-hon-it-hon-don-gian-hieu-qua\/#Nen_cung_cap_cho_ban_rat_nhieu_thuc_hanh\" >N\u00ean cung c\u1ea5p cho b\u1ea1n r\u1ea5t nhi\u1ec1u th\u1ef1c h\u00e0nh<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/www.ckconitsha.com\/vn\/huong-dan-cach-day-hoc-toan-lop-2-nhieu-hon-it-hon-don-gian-hieu-qua\/#Dat_cuoc_song_thuc_o_lop_2_hon\" >\u0110\u1eb7t cu\u1ed9c s\u1ed1ng th\u1ef1c \u1edf l\u1edbp 2 h\u01a1n<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-8\" href=\"https:\/\/www.ckconitsha.com\/vn\/huong-dan-cach-day-hoc-toan-lop-2-nhieu-hon-it-hon-don-gian-hieu-qua\/#Hay_de_tre_tham_gia_vao_cac_tro_choi_lien_quan\" >H\u00e3y \u0111\u1ec3 tr\u1ebb tham gia v\u00e0o c\u00e1c tr\u00f2 ch\u01a1i li\u00ean quan<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-9\" href=\"https:\/\/www.ckconitsha.com\/vn\/huong-dan-cach-day-hoc-toan-lop-2-nhieu-hon-it-hon-don-gian-hieu-qua\/#Bai_tap_toan_lop_2_nhieu_hon_it_hon_cho_tre_em_thuc_hanh\" >B\u00e0i t\u1eadp to\u00e1n l\u1edbp 2 nhi\u1ec1u h\u01a1n, \u00edt h\u01a1n cho tr\u1ebb em th\u1ef1c h\u00e0nh<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-10\" href=\"https:\/\/www.ckconitsha.com\/vn\/huong-dan-cach-day-hoc-toan-lop-2-nhieu-hon-it-hon-don-gian-hieu-qua\/#Bai_tap_1\" >B\u00e0i t\u1eadp 1<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-11\" href=\"https:\/\/www.ckconitsha.com\/vn\/huong-dan-cach-day-hoc-toan-lop-2-nhieu-hon-it-hon-don-gian-hieu-qua\/#Bai_tap_2\" >B\u00e0i t\u1eadp 2<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-12\" href=\"https:\/\/www.ckconitsha.com\/vn\/huong-dan-cach-day-hoc-toan-lop-2-nhieu-hon-it-hon-don-gian-hieu-qua\/#Bai_tap_3\" >B\u00e0i t\u1eadp 3<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-13\" href=\"https:\/\/www.ckconitsha.com\/vn\/huong-dan-cach-day-hoc-toan-lop-2-nhieu-hon-it-hon-don-gian-hieu-qua\/#Bai_tap_4\" >B\u00e0i t\u1eadp 4<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-14\" href=\"https:\/\/www.ckconitsha.com\/vn\/huong-dan-cach-day-hoc-toan-lop-2-nhieu-hon-it-hon-don-gian-hieu-qua\/#Bai_tap_5\" >B\u00e0i t\u1eadp 5<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-15\" href=\"https:\/\/www.ckconitsha.com\/vn\/huong-dan-cach-day-hoc-toan-lop-2-nhieu-hon-it-hon-don-gian-hieu-qua\/#Bai_tap_6\" >B\u00e0i t\u1eadp 6<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-16\" href=\"https:\/\/www.ckconitsha.com\/vn\/huong-dan-cach-day-hoc-toan-lop-2-nhieu-hon-it-hon-don-gian-hieu-qua\/#Bai_tap_7\" >B\u00e0i t\u1eadp 7<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-17\" href=\"https:\/\/www.ckconitsha.com\/vn\/huong-dan-cach-day-hoc-toan-lop-2-nhieu-hon-it-hon-don-gian-hieu-qua\/#Bai_tap_8\" >B\u00e0i t\u1eadp 8<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-18\" href=\"https:\/\/www.ckconitsha.com\/vn\/huong-dan-cach-day-hoc-toan-lop-2-nhieu-hon-it-hon-don-gian-hieu-qua\/#Bai_tap_9\" >B\u00e0i t\u1eadp 9<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-19\" href=\"https:\/\/www.ckconitsha.com\/vn\/huong-dan-cach-day-hoc-toan-lop-2-nhieu-hon-it-hon-don-gian-hieu-qua\/#Bai_tap_10\" >B\u00e0i t\u1eadp 10<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-20\" href=\"https:\/\/www.ckconitsha.com\/vn\/huong-dan-cach-day-hoc-toan-lop-2-nhieu-hon-it-hon-don-gian-hieu-qua\/#Bai_tap_11\" >B\u00e0i t\u1eadp 11<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-21\" href=\"https:\/\/www.ckconitsha.com\/vn\/huong-dan-cach-day-hoc-toan-lop-2-nhieu-hon-it-hon-don-gian-hieu-qua\/#Bai_tap_12\" >B\u00e0i t\u1eadp 12<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-22\" href=\"https:\/\/www.ckconitsha.com\/vn\/huong-dan-cach-day-hoc-toan-lop-2-nhieu-hon-it-hon-don-gian-hieu-qua\/#Bai_tap_13\" >B\u00e0i t\u1eadp 13<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-23\" href=\"https:\/\/www.ckconitsha.com\/vn\/huong-dan-cach-day-hoc-toan-lop-2-nhieu-hon-it-hon-don-gian-hieu-qua\/#Bai_tap_14\" >B\u00e0i t\u1eadp 14<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-24\" href=\"https:\/\/www.ckconitsha.com\/vn\/huong-dan-cach-day-hoc-toan-lop-2-nhieu-hon-it-hon-don-gian-hieu-qua\/#Bai_tap_15\" >B\u00e0i t\u1eadp 15<\/a><\/li><\/ul><\/li><\/ul><\/nav><\/div>\n<\/p>\n<p>To\u00e1n h\u1ecdc c\u1ea5p 2 \u00edt h\u01a1n m\u1ed9t trong c\u00e1c lo\u1ea1i b\u00e0i t\u1eadp m\u00e0 tr\u1ebb th\u01b0\u1eddng g\u1eb7p trong s\u00e1ch gi\u00e1o khoa, b\u00e0i t\u1eadp v\u00e0 b\u00e0i ki\u1ec3m tra. V\u00ec v\u1eady, \u0111\u1ec3 gi\u00fap tr\u1ebb h\u1ecdc, \u00e1p d\u1ee5ng v\u00e0 th\u1ef1c hi\u1ec7n b\u00e0i t\u1eadp n\u00e0y \u0111\u1ec3 \u0111\u1ea1t \u0111\u01b0\u1ee3c \u0111i\u1ec3m s\u1ed1 cao, ph\u1ee5 huynh c\u00f3 th\u1ec3 \u0111\u1ec1 c\u1eadp \u0111\u1ebfn c\u00e1c b\u00ed m\u1eadt \u0111\u1ec3 d\u1ea1y c\u00e1c v\u1ea5n \u0111\u1ec1 ng\u00e0y c\u00e0ng \u00edt h\u01a1n trong b\u00e0i vi\u1ebft sau.<\/p>\n<p>                                                                    <img decoding=\"async\" src=\"https:\/\/external-content.duckduckgo.com\/iu\/?u=https:\/\/vnmedia2.monkeyuni.net\/upload\/web\/img_default\/monkey3.png\" alt=\"\"><\/p>\n<p class=\"title\">H\u00e0ng tri\u1ec7u tr\u1ebb em \u0111\u00e3 ph\u00e1t tri\u1ec3n c\u00e1c k\u1ef9 n\u0103ng ng\u00f4n ng\u1eef c\u1ee7a ch\u00fang th\u00f4ng qua c\u00e1c \u1ee9ng d\u1ee5ng h\u1ecdc t\u1eadp c\u1ee7a kh\u1ec9<\/p>\n<p class=\"description\">\u0110\u0103ng k\u00fd ngay \u0111\u1ec3 \u0111\u01b0\u1ee3c t\u01b0 v\u1ea5n mi\u1ec5n ph\u00ed v\u1ec1 c\u00e1c s\u1ea3n ph\u1ea9m v\u00e0 tuy\u1ebfn h\u1ecdc h\u1ecdc cho tr\u1ebb em.<\/p>\n<p>                                                                            *Vui l\u00f2ng ki\u1ec3m tra t\u00ean \u0111\u1ea7y \u0111\u1ee7 c\u1ee7a b\u1ea1n *Vui l\u00f2ng ki\u1ec3m tra s\u1ed1 \u0111i\u1ec7n tho\u1ea1i \u0111\u1ec3 \u0111\u01b0\u1ee3c t\u01b0 v\u1ea5n mi\u1ec5n ph\u00ed<\/p>\n<h2 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Toan_hoc_cap_2_it_hon\"><\/span>To\u00e1n h\u1ecdc c\u1ea5p 2 \u00edt h\u01a1n?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p dir=\"ltr\">V\u1ec1 c\u01a1 b\u1ea3n, l\u1edbp h\u1ecdc ho\u1eb7c nhi\u1ec1u h\u01a1n ho\u1eb7c \u00edt h\u01a1n l\u00e0 to\u00e1n h\u1ecdc so s\u00e1nh. Tuy nhi\u00ean, h\u00ecnh th\u1ee9c to\u00e1n h\u1ecdc n\u00e0y th\u01b0\u1eddng s\u1ebd xu\u1ea5t hi\u1ec7n trong c\u00e1c t\u1eeb c\u00f3 t\u1eeb. Do \u0111\u00f3, tr\u1ebb em s\u1ebd kh\u00f4ng ti\u1ebfn h\u00e0nh \u0111i\u1ec1n v\u00e0o m\u1ed9t d\u1ea5u hi\u1ec7u l\u1edbn h\u01a1n ho\u1eb7c nh\u1ecf h\u01a1n nh\u01b0 khi th\u1ef1c hi\u1ec7n so s\u00e1nh th\u00f4ng th\u01b0\u1eddng.<\/p>\n<p dir=\"ltr\"><img decoding=\"async\" class=\"lazyload\" src=\"https:\/\/external-content.duckduckgo.com\/iu\/?u=https:\/\/vnmedia2.monkeyuni.net\/upload\/web\/img\/1-toan-lop-2-nhieu-hon-it-hon.jpg\" alt=\"T\u00ecm hi\u1ec3u to\u00e1n h\u1ecdc l\u1edbp 2 \u00edt h\u01a1n? (Ngu\u1ed3n h\u00ecnh \u1ea3nh: B\u1ed9 s\u01b0u t\u1eadp Internet)\" width=\"100%\"><\/p>\n<p dir=\"ltr\">\u0110\u1ed1i v\u1edbi h\u00ecnh th\u1ee9c to\u00e1n h\u1ecdc n\u00e0y, trong b\u00e0i t\u1eadp th\u01b0\u1eddng s\u1ebd xu\u1ea5t hi\u1ec7n c\u00e1c t\u1eeb kh\u00f3a nh\u01b0 \u00edt h\u01a1n, nhi\u1ec1u h\u01a1n, l\u1edbn h\u01a1n, nh\u1ecf h\u01a1n, nh\u1ecf h\u01a1n, l\u1edbn h\u01a1n, n\u1eb7ng h\u01a1n, nh\u1eb9 h\u01a1n, &#8230; trong \u0111\u00f3, c\u00e1ch d\u1ea1y nhi\u1ec1u v\u1ea5n \u0111\u1ec1 to\u00e1n h\u01a1n l\u1edbp th\u1ee9 2 s\u1ebd s\u1eed d\u1ee5ng b\u1ed5 sung. V\u00e0 l\u00e0m th\u1ebf n\u00e0o \u0111\u1ec3 d\u1ea1y c\u00e1c v\u1ea5n \u0111\u1ec1 d\u01b0\u1edbi l\u1edbp 2 s\u1ebd s\u1eed d\u1ee5ng ph\u00e9p tr\u1eeb.<\/p>\n<p dir=\"ltr\">V\u00ed d\u1ee5:<em> <\/em><em>C\u00f4 HOA \u0111\u01b0\u1ee3c m\u1eb9 t\u1eb7ng 10 k\u1eb9o. LAN \u0111\u01b0\u1ee3c m\u1eb9 c\u1ee7a c\u00f4 t\u1eb7ng nhi\u1ec1u h\u01a1n LAN h\u01a1n LAN. C\u00f4 \u1ea5y c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c t\u1eb7ng bao nhi\u00eau k\u1eb9o cho LAN?<\/em><\/p>\n<h2 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Bao_nhieu_la_kho_khan_hoac_it_hon_khi_con_ban_hoc_toan\"><\/span>Bao nhi\u00eau l\u00e0 kh\u00f3 kh\u0103n ho\u1eb7c \u00edt h\u01a1n khi con b\u1ea1n h\u1ecdc to\u00e1n?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p dir=\"ltr\">M\u1eb7c d\u00f9 to\u00e1n h\u1ecdc l\u1edbp 2 c\u00f3 nhi\u1ec1u ki\u1ebfn \u200b\u200bth\u1ee9c h\u01a1n l\u00e0 m\u1ed9t to\u00e1n h\u1ecdc so s\u00e1nh, nh\u01b0ng v\u1edbi suy ngh\u0129 c\u1ee7a tr\u1ebb khi ch\u00fang l\u1ea7n \u0111\u1ea7u ti\u00ean tr\u1edf l\u1ea1i l\u1edbp 2, ch\u00fang v\u1eabn g\u1eb7p nhi\u1ec1u kh\u00f3 kh\u0103n. \u0110\u00f4i khi b\u1ecdn tr\u1ebb s\u1ebd hi\u1ec3u h\u00ecnh th\u1ee9c to\u00e1n h\u1ecdc n\u00e0y m\u1ed9t c\u00e1ch ph\u1ee9c t\u1ea1p.<\/p>\n<p dir=\"ltr\"><img decoding=\"async\" class=\"lazyload\" src=\"https:\/\/external-content.duckduckgo.com\/iu\/?u=https:\/\/vnmedia2.monkeyuni.net\/upload\/web\/img\/2-toan-lop-2-nhieu-hon-it-hon.jpg\" alt=\"Kh\u00f3 kh\u0103n g\u1eb7p nhau khi h\u1ecdc th\u00eam to\u00e1n h\u1ecdc, \u00edt h\u01a1n (Ngu\u1ed3n \u1ea3nh: B\u1ed9 s\u01b0u t\u1eadp Internet)\" width=\"100%\"><\/p>\n<p dir=\"ltr\">Ng\u00e0y c\u00e0ng c\u00f3 \u00edt b\u00e0i t\u1eadp v\u1ec1 c\u01a1 b\u1ea3n l\u00e0 tr\u1eeb \u0111i c\u0169ng nh\u01b0 s\u1ed1 l\u01b0\u1ee3ng v\u00e0 so s\u00e1nh b\u00ecnh th\u01b0\u1eddng. Do \u0111\u00f3, n\u1ebfu tr\u1ebb kh\u00f4ng nh\u1eadn th\u1ee9c \u0111\u01b0\u1ee3c c\u00e1c con s\u1ed1 c\u0169ng nh\u01b0 kh\u00f4ng t\u00ednh to\u00e1n ho\u1eb7c kh\u00f4ng bi\u1ebft nh\u1eefng g\u00ec l\u00e0 \u00edt nhi\u1ec1u, vi\u1ec7c h\u1ecdc ch\u01b0\u01a1ng tr\u00ecnh ki\u1ebfn \u200b\u200bth\u1ee9c n\u00e0y s\u1ebd r\u1ea5t kh\u00f3 kh\u0103n. Qua:<\/p>\n<ul>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">N\u1ebfu tr\u1ebb kh\u00f4ng bi\u1ebft v\u1ec1 con s\u1ed1, ch\u00fang s\u1ebd t\u00ednh sai<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">Khi tr\u1ebb t\u00ednh kh\u00f4ng ch\u00ednh x\u00e1c, ch\u00fang s\u1ebd vi\u1ebft k\u1ebft qu\u1ea3 kh\u00f4ng ch\u00ednh x\u00e1c<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">Nh\u1eefng \u0111\u1ee9a tr\u1ebb kh\u00f4ng bi\u1ebft nh\u1eefng g\u00ec \u00edt h\u01a1n v\u00e0 h\u01a1n th\u1ebf n\u1eefa, tr\u1ebb s\u1ebd \u00e1p d\u1ee5ng c\u00e1c t\u00ednh to\u00e1n sai <\/p>\n<\/li>\n<\/ul>\n<p dir=\"ltr\">\u0110\u1ed3ng th\u1eddi, kh\u1ea3 n\u0103ng ngh\u0129 v\u1ec1 tr\u1ebb em c\u0169ng \u1ea3nh h\u01b0\u1edfng r\u1ea5t l\u1edbn \u0111\u1ebfn k\u1ebft qu\u1ea3 h\u1ecdc t\u1eadp.<\/p>\n<h2 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Bi_quyet_de_giup_tre_hoc_toan_nhieu_hon_o_lop_2_nhieu_hon_it_hieu_qua_hon\"><\/span>B\u00ed quy\u1ebft \u0111\u1ec3 gi\u00fap tr\u1ebb h\u1ecdc to\u00e1n nhi\u1ec1u h\u01a1n \u1edf l\u1edbp 2 nhi\u1ec1u h\u01a1n, \u00edt hi\u1ec7u qu\u1ea3 h\u01a1n<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p dir=\"ltr\">\u0110\u1ec3 gi\u00fap tr\u1ebb v\u01b0\u1ee3t qua nh\u1eefng kh\u00f3 kh\u0103n khi h\u1ecdc to\u00e1n h\u1ecdc \u1edf l\u1edbp 2, ph\u1ee5 huynh n\u00ean c\u00f3 nh\u1eefng l\u1eddi khuy\u00ean \u0111\u1ec3 gi\u00fap con c\u00e1i ch\u00fang h\u1ecdc hi\u1ec7u qu\u1ea3 h\u01a1n. Nh\u1eefng l\u1eddi khuy\u00ean \u0111\u00f3 l\u00e0:<\/p>\n<h3 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Trang_bi_ung_dung_toan_hoc_khi_be_cua_ban\"><\/span>Trang b\u1ecb \u1ee9ng d\u1ee5ng to\u00e1n h\u1ecdc kh\u1ec9 b\u00e9 c\u1ee7a b\u1ea1n<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p dir=\"ltr\">Trang b\u1ecb cho tr\u1ebb em \u1ee9ng d\u1ee5ng to\u00e1n h\u1ecdc kh\u1ec9 th\u1ef1c s\u1ef1 l\u00e0 m\u1ed9t \u0111i\u1ec1u r\u1ea5t quan tr\u1ecdng. L\u00fd do l\u00e0 v\u00ec \u0111\u00e2y l\u00e0 m\u1ed9t \u1ee9ng d\u1ee5ng to\u00e1n h\u1ecdc ph\u00f9 h\u1ee3p cho h\u1ecdc sinh trong nhi\u1ec1u l\u1edbp, nhi\u1ec1u \u0111\u1ed9 tu\u1ed5i kh\u00e1c nhau.<\/p>\n<p dir=\"ltr\"><img decoding=\"async\" class=\"lazyload\" src=\"https:\/\/external-content.duckduckgo.com\/iu\/?u=https:\/\/vnmedia2.monkeyuni.net\/upload\/web\/img\/3-toan-lop-2-nhieu-hon-it-hon.jpg\" alt=\"H\u1ecdc to\u00e1n v\u1edbi to\u00e1n h\u1ecdc kh\u1ec9 gi\u00fap tr\u1ebb t\u1ed1t h\u01a1n to\u00e1n h\u1ecdc (ngu\u1ed3n \u1ea3nh: kh\u1ec9)\" width=\"100%\"><\/p>\n<p dir=\"ltr\">Trong b\u00e0i h\u1ecdc to\u00e1n kh\u1ec9, s\u1ebd c\u00f3 c\u00e1c ph\u01b0\u01a1ng ph\u00e1p h\u1ecdc t\u1eadp \u0111\u1eb7c bi\u1ec7t gi\u00fap tr\u1ebb nh\u1eadn ra b\u1ea3n ch\u1ea5t th\u1ef1c s\u1ef1 c\u1ee7a to\u00e1n h\u1ecdc l\u1edbp 2 nhi\u1ec1u h\u01a1n nh\u1eefng g\u00ec \u00edt h\u01a1n. Th\u00f4ng qua c\u00e1c v\u00ed d\u1ee5 v\u00e0 tr\u00f2 ch\u01a1i, b\u1ea1n s\u1ebd hi\u1ec3u r\u00f5 h\u01a1n v\u1ec1 ki\u1ebfn \u200b\u200bth\u1ee9c b\u1ea1n c\u1ea7n n\u1eafm b\u1eaft trong khi tr\u1ebb kh\u00f4ng c\u1ea3m th\u1ea5y m\u1ec7t m\u1ecfi hay \u00e1p l\u1ef1c.<\/p>\n<p dir=\"ltr\">V\u00e0 \u0111\u1ec3 t\u0103ng c\u01b0\u1eddng ki\u1ebfn \u200b\u200bth\u1ee9c cho tr\u1ebb em, v\u00e0o cu\u1ed1i m\u1ed7i b\u00e0i h\u1ecdc to\u00e1n kh\u1ec9 c\u0169ng \u0111\u00e3 thi\u1ebft k\u1ebf c\u00e1c b\u00e0i t\u1eadp b\u1ed5 sung b\u1ed5 sung cho tr\u1ebb em \u0111\u1ec3 th\u1ef1c h\u00e0nh. V\u1edbi c\u00e1c b\u00e0i t\u1eadp b\u1ed5 sung n\u00e0y, cha m\u1eb9 c\u00f3 th\u1ec3 ki\u1ec3m tra m\u1ee9c \u0111\u1ed9 hi\u1ec3u bi\u1ebft c\u1ee7a con c\u00e1i c\u0169ng nh\u01b0 \u00e1p d\u1ee5ng \u0111\u1ec3 l\u00e0m cho ch\u00fang th\u00e0nh th\u1ea1o h\u01a1n.<\/p>\n<p dir=\"ltr\">T\u1ea3i xu\u1ed1ng Shining Home &#8211; Gia \u0111\u00ecnh Anh Ng\u1eef Math cho \u0111i\u1ec7n tho\u1ea1i Android<\/p>\n<p dir=\"ltr\">T\u1ea3i xu\u1ed1ng Shining Home &#8211; Gia \u0111\u00ecnh Anh Ng\u1eef Math cho \u0111i\u1ec7n tho\u1ea1i iOS<\/p>\n<h3 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Giup_con_ban_thanh_thao_kien_%E2%80%8B%E2%80%8Bthuc_toan_hoc_lop_2\"><\/span>Gi\u00fap con b\u1ea1n th\u00e0nh th\u1ea1o ki\u1ebfn \u200b\u200bth\u1ee9c to\u00e1n h\u1ecdc l\u1edbp 2<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p dir=\"ltr\">D\u1ea1y to\u00e1n l\u1edbp 2 v\u1edbi nhi\u1ec1u ki\u1ebfn \u200b\u200bth\u1ee9c ho\u1eb7c \u00edt h\u01a1n l\u00e0 m\u1ed9t h\u00ecnh th\u1ee9c to\u00e1n h\u1ecdc li\u00ean quan \u0111\u1ebfn nhi\u1ec1u ki\u1ebfn \u200b\u200bth\u1ee9c h\u01a1n. Tr\u1ebb em trung b\u00ecnh ph\u1ea3i nh\u1edb ki\u1ebfn \u200b\u200bth\u1ee9c v\u1ec1 b\u1ed5 sung ho\u1eb7c tr\u1eeb, ki\u1ebfn \u200b\u200bth\u1ee9c v\u00e0 ki\u1ebfn \u200b\u200bth\u1ee9c so s\u00e1nh v\u1ec1 c\u00e1c con s\u1ed1.<\/p>\n<p dir=\"ltr\">Do \u0111\u00f3, ph\u1ee5 huynh c\u1ea7n gi\u00fap con c\u00e1i n\u1eafm b\u1eaft ki\u1ebfn \u200b\u200bth\u1ee9c to\u00e1n h\u1ecdc l\u1edbp 2 tr\u01b0\u1edbc khi nghi\u00ean c\u1ee9u nhi\u1ec1u ho\u1eb7c \u00edt ch\u01b0\u01a1ng tr\u00ecnh. Khi tr\u1ebb bi\u1ebft ki\u1ebfn \u200b\u200bth\u1ee9c li\u00ean quan \u0111\u1ebfn to\u00e1n h\u1ecdc c\u1ea5p 2, ch\u00fang s\u1ebd d\u1ec5 d\u00e0ng ti\u1ebfp thu ki\u1ebfn \u200b\u200bth\u1ee9c h\u01a1n khi h\u1ecdc ng\u00e0y c\u00e0ng \u00edt h\u01a1n.<\/p>\n<p dir=\"ltr\">Ngo\u00e0i nh\u1eefng \u0111\u1ee9a tr\u1ebb l\u1eafng nghe c\u00e1c b\u00e0i gi\u1ea3ng c\u1ee7a gi\u00e1o vi\u00ean trong l\u1edbp, ph\u1ee5 huynh n\u00ean d\u00e0nh th\u1eddi gian \u0111\u1ec3 ki\u1ec3m tra ki\u1ebfn \u200b\u200bth\u1ee9c c\u1ee7a con c\u00e1i. Ngo\u00e0i ra, ph\u1ee5 huynh c\u0169ng n\u00ean b\u1ed5 sung cho con c\u00e1i c\u1ee7a h\u1ecd trong to\u00e1n h\u1ecdc c\u1ea5p 2 t\u1ea1i nh\u00e0 ho\u1eb7c v\u00e0o c\u00e1c ng\u00e0y l\u1ec5 \u0111\u1ec3 h\u1ecd c\u00f3 th\u1ec3 n\u1eafm b\u1eaft \u0111\u01b0\u1ee3c ki\u1ebfn \u200b\u200bth\u1ee9c c\u01a1 b\u1ea3n \u0111\u1ec3 n\u00e2ng cao.<\/p>\n<h3 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Nen_cung_cap_cho_ban_rat_nhieu_thuc_hanh\"><\/span>N\u00ean cung c\u1ea5p cho b\u1ea1n r\u1ea5t nhi\u1ec1u th\u1ef1c h\u00e0nh<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p dir=\"ltr\">M\u1ed9t trong nh\u1eefng ph\u01b0\u01a1ng ph\u00e1p h\u1ecdc t\u1eadp c\u1ef1c k\u1ef3 hi\u1ec7u qu\u1ea3 m\u00e0 h\u1ea7u h\u1ebft sinh vi\u00ean ng\u00e0y nay \u00e1p d\u1ee5ng l\u00e0 r\u1ea5t nhi\u1ec1u th\u1ef1c h\u00e0nh. Khi tr\u1ebb \u0111\u01b0\u1ee3c th\u1ef1c h\u00e0nh r\u1ea5t nhi\u1ec1u, ch\u00fang s\u1ebd hi\u1ec3u r\u00f5 h\u01a1n v\u1ec1 ki\u1ebfn \u200b\u200bth\u1ee9c v\u00e0 ghi nh\u1edb ki\u1ebfn \u200b\u200bth\u1ee9c l\u00e2u h\u01a1n.<\/p>\n<p dir=\"ltr\"><img decoding=\"async\" class=\"lazyload\" src=\"https:\/\/external-content.duckduckgo.com\/iu\/?u=https:\/\/vnmedia2.monkeyuni.net\/upload\/web\/img\/4-toan-lop-2-nhieu-hon-it-hon.jpg\" alt=\"Cha m\u1eb9 cho con c\u00e1i t\u1eadp th\u1ec3 d\u1ee5c nhi\u1ec1u h\u01a1n (Ngu\u1ed3n h\u00ecnh \u1ea3nh: B\u1ed9 s\u01b0u t\u1eadp Internet)\" width=\"100%\"><\/p>\n<p dir=\"ltr\">Do \u0111\u00f3, cha m\u1eb9 n\u00ean \u0111\u1ec3 con c\u00e1i th\u1ef1c h\u00e0nh c\u00e1c b\u00e0i t\u1eadp li\u00ean quan \u0111\u1ebfn l\u1edbp 2 nhi\u1ec1u h\u01a1n \u0111\u1ec3 ch\u00fang c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c c\u1ecd x\u00e1t nhi\u1ec1u h\u01a1n v\u1edbi c\u00e1c b\u00e0i t\u1eadp. \u0110i\u1ec1u n\u00e0y s\u1ebd gi\u00fap tr\u1ebb kh\u00f4ng qu\u00e1 x\u1ea5u h\u1ed5 khi g\u1eb7p c\u00e1c b\u00e0i t\u1eadp h\u01a1i l\u1ea1 trong c\u00e1c b\u00e0i ki\u1ec3m tra ho\u1eb7c b\u00e0i ki\u1ec3m tra.<\/p>\n<h3 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Dat_cuoc_song_thuc_o_lop_2_hon\"><\/span>\u0110\u1eb7t cu\u1ed9c s\u1ed1ng th\u1ef1c \u1edf l\u1edbp 2 h\u01a1n<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p dir=\"ltr\">\u0110\u1ec3 gi\u00fap tr\u1ebb em c\u00f3 th\u1ec3 h\u00ecnh dung nhi\u1ec1u h\u01a1n v\u1ec1 to\u00e1n h\u1ecdc l\u1edbp 2 \u00edt nhi\u1ec1u, m\u1ed9t b\u00ed m\u1eadt n\u1eefa r\u1eb1ng ph\u1ee5 huynh kh\u00f4ng n\u00ean b\u1ecf qua l\u00e0 \u0111\u01b0a cu\u1ed9c s\u1ed1ng th\u1ef1c v\u00e0o c\u00e1c b\u00e0i h\u1ecdc c\u1ee7a con c\u00e1i h\u1ecd. Cha m\u1eb9 c\u00f3 th\u1ec3 ngay l\u1eadp t\u1ee9c l\u1ea5y v\u00ed d\u1ee5 trong cu\u1ed9c s\u1ed1ng h\u00e0ng ng\u00e0y \u0111\u1ec3 con c\u00e1i h\u1ecd c\u00f3 th\u1ec3 c\u1ea3m th\u1ea5y g\u1ea7n g\u0169i h\u01a1n v\u00e0 h\u00ecnh dung r\u00f5 r\u00e0ng h\u01a1n.<\/p>\n<p dir=\"ltr\">V\u00ed d\u1ee5, cha m\u1eb9 c\u00f3 th\u1ec3 cho con h\u1ecd hai t\u00fai m\u00e0u cam. C\u00f3 m\u1ed9t t\u00fai nhi\u1ec1u h\u01a1n v\u00e0 m\u1ed9t t\u00fai \u00edt h\u01a1n. Cha m\u1eb9 s\u1ebd y\u00eau c\u1ea7u tr\u1ebb xem nhi\u1ec1u t\u00fai h\u01a1n t\u00fai nhi\u1ec1u h\u01a1n bao nhi\u00eau tr\u00e1i c\u00e2y.<\/p>\n<h3 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Hay_de_tre_tham_gia_vao_cac_tro_choi_lien_quan\"><\/span>H\u00e3y \u0111\u1ec3 tr\u1ebb tham gia v\u00e0o c\u00e1c tr\u00f2 ch\u01a1i li\u00ean quan<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p dir=\"ltr\">N\u00f3 c\u0169ng th\u00fa v\u1ecb h\u01a1n khi tham gia c\u00f9ng tr\u1ebb em tham gia v\u00e0o tr\u00f2 ch\u01a1i. Nh\u1eefng tr\u00f2 ch\u01a1i n\u00e0y s\u1ebd gi\u00fap tr\u1ebb em kh\u00f4ng c\u1ea3m th\u1ea5y \u00e1p l\u1ef1c khi h\u1ecdc.<\/p>\n<p dir=\"ltr\"><img decoding=\"async\" class=\"lazyload\" src=\"https:\/\/external-content.duckduckgo.com\/iu\/?u=https:\/\/vnmedia2.monkeyuni.net\/upload\/web\/img\/5-toan-lop-2-nhieu-hon-it-hon.jpg\" alt=\"Cha m\u1eb9 cho con tham gia v\u00e0o c\u00e1c tr\u00f2 ch\u01a1i li\u00ean quan \u0111\u1ebfn nhi\u1ec1u h\u01a1n, \u00edt h\u01a1n (Ngu\u1ed3n h\u00ecnh \u1ea3nh: B\u1ed9 s\u01b0u t\u1eadp Internet)\" width=\"100%\"><\/p>\n<p dir=\"ltr\">V\u00e0 \u0111i\u1ec1u \u0111\u1eb7c bi\u1ec7t nh\u1ea5t l\u00e0 \u0111\u00f4i khi v\u1edbi c\u00e1c tr\u00f2 ch\u01a1i, ch\u00fang s\u1ebd c\u00f3 \u0111\u01b0\u1ee3c ki\u1ebfn \u200b\u200bth\u1ee9c nhanh h\u01a1n tr\u1ebb em h\u1ecdc theo c\u00e1c ch\u01b0\u01a1ng tr\u00ecnh gi\u1ea3ng d\u1ea1y truy\u1ec1n th\u1ed1ng. Vi\u1ec7c t\u00edch h\u1ee3p ki\u1ebfn \u200b\u200bth\u1ee9c c\u01a1 b\u1ea3n v\u00e0o c\u00e1c tr\u00f2 ch\u01a1i c\u0169ng l\u00e0 m\u1ed9t trong nh\u1eefng c\u00e1ch gi\u1ea3ng d\u1ea1y \u0111\u1ec3 gi\u00fap tr\u1ebb ph\u00e1t tri\u1ec3n suy ngh\u0129 t\u1ed1t h\u01a1n.<\/p>\n<h2 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Bai_tap_toan_lop_2_nhieu_hon_it_hon_cho_tre_em_thuc_hanh\"><\/span>B\u00e0i t\u1eadp to\u00e1n l\u1edbp 2 nhi\u1ec1u h\u01a1n, \u00edt h\u01a1n cho tr\u1ebb em th\u1ef1c h\u00e0nh<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p dir=\"ltr\">\u0110\u1ec3 gi\u00fap tr\u1ebb c\u00f3 th\u1ec3 h\u1ecdc t\u1eadp t\u1ed1t trong ch\u01b0\u01a1ng tr\u00ecnh to\u00e1n h\u1ecdc l\u1edbp 2 ng\u00e0y c\u00e0ng \u00edt h\u01a1n, ph\u1ee5 huynh c\u00f3 th\u1ec3 \u0111\u1ec3 con c\u00e1i th\u1ef1c h\u00e0nh c\u00e1c b\u00e0i t\u1eadp sau:<\/p>\n<p dir=\"ltr\"><img decoding=\"async\" class=\"lazyload\" src=\"https:\/\/external-content.duckduckgo.com\/iu\/?u=https:\/\/vnmedia2.monkeyuni.net\/upload\/web\/img\/6-toan-lop-2-nhieu-hon-it-hon.jpg\" alt=\"B\u00e0i t\u1eadp to\u00e1n ng\u00e0y c\u00e0ng \u00edt (Ngu\u1ed3n h\u00ecnh \u1ea3nh: B\u1ed9 s\u01b0u t\u1eadp Internet)\" width=\"100%\"><\/p>\n<h3 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Bai_tap_1\"><\/span>B\u00e0i t\u1eadp 1<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p dir=\"ltr\">Nh\u00e0 c\u1ee7a Mai c\u00f3 50 c\u00e2y longan trong v\u01b0\u1eddn. S\u1ed1 l\u01b0\u1ee3ng t\u00e1o \u00edt h\u01a1n s\u1ed1 l\u01b0\u1ee3ng c\u00e2y longan l\u00e0 27. Ng\u00e0y mai c\u00f3 bao nhi\u00eau c\u00e2y t\u00e1o?<\/p>\n<h3 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Bai_tap_2\"><\/span>B\u00e0i t\u1eadp 2<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p dir=\"ltr\">C\u00f3 m\u1ed9t lo\u1ea1i d\u1ea7u 18 liter trong nh\u00e0. Lon x\u0103ng c\u00f3 \u00edt l\u00edt h\u01a1n lon d\u1ea7u l\u00e0 5 l\u00edt. H\u1ecfi c\u00f3 bao nhi\u00eau l\u00edt th\u00f9ng x\u0103ng?<\/p>\n<h3 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Bai_tap_3\"><\/span>B\u00e0i t\u1eadp 3<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p dir=\"ltr\">M\u1eb9 \u0111\u00e3 mua hai ch\u1ecb em 15 b\u00fat ch\u00ec. S\u1ed1 l\u01b0\u1ee3ng b\u00fat ch\u00ec \u00edt h\u01a1n t\u1ed5ng s\u1ed1 b\u00fat ch\u00ec c\u1ee7a hai ch\u1ecb em. B\u1ea1n c\u00f3 bao nhi\u00eau b\u00fat ch\u00ec?<\/p>\n<h3 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Bai_tap_4\"><\/span>B\u00e0i t\u1eadp 4<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p dir=\"ltr\">Trong b\u00e3i \u0111\u1eadu xe, c\u00f3 17 chi\u1ebfc xe m\u00e1y. S\u1ed1 l\u01b0\u1ee3ng xe h\u01a1i nhi\u1ec1u h\u01a1n 28 so v\u1edbi s\u1ed1 l\u01b0\u1ee3ng xe h\u01a1i. C\u00f3 bao nhi\u00eau chi\u1ebfc xe trong b\u00e3i \u0111\u1eadu xe?<\/p>\n<h3 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Bai_tap_5\"><\/span>B\u00e0i t\u1eadp 5<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p dir=\"ltr\">M\u1eb9 \u0111\u00e3 \u0111i ch\u1ee3 \u0111\u1ec3 mua 40.000 lo\u1ea1i rau. L\u01b0\u1ee3ng th\u1ecbt m\u1eb9 mua nhi\u1ec1u h\u01a1n s\u1ed1 l\u01b0\u1ee3ng rau l\u00e0 29.000. Y\u00eau c\u1ea7u m\u1eb9 mua t\u1ea5t c\u1ea3 ti\u1ec1n?<\/p>\n<h3 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Bai_tap_6\"><\/span>B\u00e0i t\u1eadp 6<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p dir=\"ltr\">Trong l\u1edbp h\u1ecdc, c\u00f3 12 sinh vi\u00ean n\u1eef. S\u1ed1 l\u01b0\u1ee3ng sinh vi\u00ean nam \u00edt h\u01a1n s\u1ed1 l\u01b0\u1ee3ng sinh vi\u00ean n\u1eef l\u00e0 4 ng\u01b0\u1eddi b\u1ea1n. H\u1ecfi c\u00f3 bao nhi\u00eau sinh vi\u00ean nam?<\/p>\n<h3 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Bai_tap_7\"><\/span>B\u00e0i t\u1eadp 7<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p dir=\"ltr\">N\u0103m nay, m\u1eb9 t\u00f4i 48 tu\u1ed5i. Tu\u1ed5i c\u1ee7a tu\u1ed5i c\u1ee7a c\u00f4 Hai \u00edt h\u01a1n tu\u1ed5i c\u1ee7a m\u1eb9 c\u00f4 28 tu\u1ed5i. Hai tu\u1ed5i bao nhi\u00eau tu\u1ed5i?<\/p>\n<h3 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Bai_tap_8\"><\/span>B\u00e0i t\u1eadp 8<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p dir=\"ltr\">C\u00f3 32 qu\u1ea1t \u0111i\u1ec7n trong c\u1eeda h\u00e0ng. S\u1ed1 l\u01b0\u1ee3ng qu\u1ea1t \u0111i\u1ec7n nhi\u1ec1u h\u01a1n 28 so v\u1edbi s\u1ed1 l\u01b0\u1ee3ng qu\u1ea1t \u0111i\u1ec7n. C\u00f3 bao nhi\u00eau qu\u1ea1t \u0111i\u1ec7n trong c\u1eeda h\u00e0ng?<\/p>\n<h3 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Bai_tap_9\"><\/span>B\u00e0i t\u1eadp 9<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p dir=\"ltr\">T\u1ea1i qu\u1ea7y v\u0103n ph\u00f2ng ph\u1ea9m c\u00f3 150 c\u00e2y b\u00fat b\u00f3ng m\u00e0u xanh. S\u1ed1 l\u01b0\u1ee3ng b\u00fat b\u00f3ng m\u00e0u \u0111\u1ecf c\u00f3 nhi\u1ec1u h\u01a1n s\u1ed1 l\u01b0\u1ee3ng b\u00fat b\u00f3ng xanh 58 mi\u1ebfng. C\u00f3 bao nhi\u00eau c\u00e2y b\u00fat b\u00f3ng \u0111\u1ecf?<\/p>\n<h3 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Bai_tap_10\"><\/span>B\u00e0i t\u1eadp 10<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p dir=\"ltr\">B\u1ea1n c\u1ee7a t\u00f4i \u0111\u00e3 \u0111\u01b0\u1ee3c m\u1eb9 c\u00f4 \u1ea5y mua cho 10 ng\u01b0\u1eddi cai tr\u1ecb 30 cm. Th\u01b0\u1edbc \u0111o chi\u1ec1u d\u00e0i 20 cm d\u00e0i h\u01a1n 8 cm so v\u1edbi s\u1ed1 l\u01b0\u1ee3ng quy t\u1eafc c\u1ee7a 8 PC. C\u00f3 bao nhi\u00eau ng\u01b0\u1eddi cai tr\u1ecb d\u00e0i 20 cm?<\/p>\n<h3 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Bai_tap_11\"><\/span>B\u00e0i t\u1eadp 11<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p dir=\"ltr\">M\u1ed9t c\u1eeda h\u00e0ng c\u00f3 150 \u0111i\u1ec7n tho\u1ea1i. S\u1ed1 l\u01b0\u1ee3ng m\u00e1y t\u00ednh th\u1ea5p h\u01a1n 78 \u0111\u01a1n v\u1ecb so v\u1edbi \u0111i\u1ec7n tho\u1ea1i. C\u00f3 bao nhi\u00eau m\u00e1y t\u00ednh c\u00f3 bao nhi\u00eau m\u00e1y t\u00ednh?<\/p>\n<h3 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Bai_tap_12\"><\/span>B\u00e0i t\u1eadp 12<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p dir=\"ltr\">C\u00f3 28 vi\u00ean k\u1eb9o trong gi\u1ecf. S\u1ed1 l\u01b0\u1ee3ng b\u00e1nh trong gi\u1ecf cao h\u01a1n 32 so v\u1edbi s\u1ed1 l\u01b0\u1ee3ng k\u1eb9o. C\u00f3 bao nhi\u00eau b\u00e1nh?<\/p>\n<h3 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Bai_tap_13\"><\/span>B\u00e0i t\u1eadp 13<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p dir=\"ltr\">S\u1ed1 l\u01b0\u1ee3ng b\u00e0n trong h\u1ed9i tr\u01b0\u1eddng l\u00e0 18. S\u1ed1 l\u01b0\u1ee3ng gh\u1ebf trong h\u1ed9i tr\u01b0\u1eddng cao h\u01a1n 54 so v\u1edbi s\u1ed1 l\u01b0\u1ee3ng b\u00e0n. C\u00f3 bao nhi\u00eau chi\u1ebfc gh\u1ebf trong h\u1ed9i tr\u01b0\u1eddng?<\/p>\n<h3 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Bai_tap_14\"><\/span>B\u00e0i t\u1eadp 14<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p dir=\"ltr\">M\u1ed9t c\u1eeda h\u00e0ng c\u00f3 40 qu\u1ea3 cam. C\u00e1c \u00edt h\u01a1n m\u00e0u cam l\u00e0 12 qu\u1ea3. H\u1ecfi c\u1eeda h\u00e0ng c\u00f3 bao nhi\u00eau qu\u00fdt.<\/p>\n<h3 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Bai_tap_15\"><\/span>B\u00e0i t\u1eadp 15<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p dir=\"ltr\">\u1ede m\u1eabu gi\u00e1o, c\u00f3 27 si\u00eau anh h\u00f9ng. S\u1ed1 l\u01b0\u1ee3ng b\u00fap b\u00ea \u00edt h\u01a1n Superman l\u00e0 3 \u0111\u1ee9a tr\u1ebb. C\u00f3 bao nhi\u00eau con b\u00fap b\u00ea?<\/p>\n<p dir=\"ltr\">Xem th\u00eam: C\u00f9ng v\u1edbi tr\u1ebb em h\u1ecdc t\u1eadp 2 -meter nh\u1edd h\u01a1n 5 tr\u1ea3i nghi\u1ec7m n\u00e0y!<\/p>\n<\/p>\n<p dir=\"ltr\">Tr\u00ean \u0111\u00e2y l\u00e0 m\u1ed9t b\u1ea3n t\u00f3m t\u1eaft c\u00e1c th\u00f4ng tin \u0111\u1ea7y \u0111\u1ee7 v\u00e0 chi ti\u1ebft nh\u1ea5t \u0111\u1ec3 l\u00e0m cho to\u00e1n h\u1ecdc l\u1edbp 2 tr\u1edf n\u00ean \u00edt h\u01a1n \u0111\u1ec3 ph\u1ee5 huynh c\u00f3 th\u1ec3 h\u01b0\u1edbng d\u1eabn con c\u00e1i h\u1ecdc to\u00e1n hi\u1ec7u qu\u1ea3 h\u01a1n. Hy v\u1ecdng r\u1eb1ng \u0111\u00e2y s\u1ebd l\u00e0 th\u00f4ng tin chia s\u1ebb h\u1eefu \u00edch nh\u1ea5t \u0111\u1ec3 gi\u00fap tr\u1ebb h\u1ecdc to\u00e1n hi\u1ec7u qu\u1ea3 v\u00e0 d\u1ec5 d\u00e0ng h\u01a1n.<\/p>\n<p>Ngu\u1ed3n: <a href=\"http:\/\/www.ckconitsha.com\/vn\/\">http:\/\/www.ckconitsha.com\/vn\/<\/a> T\u00e1c gi\u1ea3: <a href=\"https:\/\/www.ckconitsha.com\/vn\/author\/nguyenlandung\">Nguy\u1ec5n L\u00e2n d\u0169ng<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>To\u00e1n h\u1ecdc c\u1ea5p 2 \u00edt h\u01a1n m\u1ed9t trong c\u00e1c lo\u1ea1i b\u00e0i t\u1eadp m\u00e0 tr\u1ebb th\u01b0\u1eddng g\u1eb7p trong s\u00e1ch gi\u00e1o khoa, b\u00e0i t\u1eadp v\u00e0 b\u00e0i ki\u1ec3m tra. V\u00ec v\u1eady, \u0111\u1ec3 gi\u00fap tr\u1ebb h\u1ecdc, \u00e1p d\u1ee5ng v\u00e0 th\u1ef1c hi\u1ec7n b\u00e0i t\u1eadp n\u00e0y \u0111\u1ec3 \u0111\u1ea1t \u0111\u01b0\u1ee3c \u0111i\u1ec3m s\u1ed1 cao, ph\u1ee5 huynh c\u00f3 th\u1ec3 \u0111\u1ec1 c\u1eadp \u0111\u1ebfn c\u00e1c b\u00ed&#8230;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[100],"tags":[],"class_list":["post-18089","post","type-post","status-publish","format-standard","hentry","category-kien-thuc"],"_links":{"self":[{"href":"https:\/\/www.ckconitsha.com\/vn\/wp-json\/wp\/v2\/posts\/18089","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.ckconitsha.com\/vn\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.ckconitsha.com\/vn\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.ckconitsha.com\/vn\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.ckconitsha.com\/vn\/wp-json\/wp\/v2\/comments?post=18089"}],"version-history":[{"count":2,"href":"https:\/\/www.ckconitsha.com\/vn\/wp-json\/wp\/v2\/posts\/18089\/revisions"}],"predecessor-version":[{"id":23689,"href":"https:\/\/www.ckconitsha.com\/vn\/wp-json\/wp\/v2\/posts\/18089\/revisions\/23689"}],"wp:attachment":[{"href":"https:\/\/www.ckconitsha.com\/vn\/wp-json\/wp\/v2\/media?parent=18089"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.ckconitsha.com\/vn\/wp-json\/wp\/v2\/categories?post=18089"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.ckconitsha.com\/vn\/wp-json\/wp\/v2\/tags?post=18089"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}