{"id":17542,"date":"2025-07-05T06:30:05","date_gmt":"2025-07-04T23:30:05","guid":{"rendered":"https:\/\/www.ckconitsha.com\/vn\/?p=17542"},"modified":"2025-07-06T22:35:08","modified_gmt":"2025-07-06T15:35:08","slug":"giup-be-hoc-toan-lop-2-phep-cong-co-nho-trong-pham-vi-100-cuc-de-dang","status":"publish","type":"post","link":"https:\/\/www.ckconitsha.com\/vn\/giup-be-hoc-toan-lop-2-phep-cong-co-nho-trong-pham-vi-100-cuc-de-dang\/","title":{"rendered":"Gi\u00fap b\u00e9 h\u1ecdc to\u00e1n l\u1edbp 2 ph\u00e9p c\u1ed9ng c\u00f3 nh\u1edb trong ph\u1ea1m vi 100 c\u1ef1c d\u1ec5 d\u00e0ng"},"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\/giup-be-hoc-toan-lop-2-phep-cong-co-nho-trong-pham-vi-100-cuc-de-dang\/#Nhung_kho_khan_khi_be_hoc_phep_cong_co_nho_trong_pham_vi_100\" >Nh\u1eefng kh\u00f3 kh\u0103n khi b\u00e9 h\u1ecdc ph\u00e9p c\u1ed9ng c\u00f3 nh\u1edb trong ph\u1ea1m vi 100<\/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\/giup-be-hoc-toan-lop-2-phep-cong-co-nho-trong-pham-vi-100-cuc-de-dang\/#5_dang_toan_lop_2_khi_hoc_phep_cong_co_nho_pham_vi_100\" >5 d\u1ea1ng to\u00e1n l\u1edbp 2 khi h\u1ecdc ph\u00e9p c\u1ed9ng c\u00f3 nh\u1edb ph\u1ea1m vi 100<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/www.ckconitsha.com\/vn\/giup-be-hoc-toan-lop-2-phep-cong-co-nho-trong-pham-vi-100-cuc-de-dang\/#Dang_1_Tinh_nham\" >D\u1ea1ng 1: T\u00ednh nh\u1ea9m<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/www.ckconitsha.com\/vn\/giup-be-hoc-toan-lop-2-phep-cong-co-nho-trong-pham-vi-100-cuc-de-dang\/#Dang_2_Dat_tinh_roi_tinh\" >D\u1ea1ng 2: \u0110\u1eb7t t\u00ednh r\u1ed3i t\u00ednh<\/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\/giup-be-hoc-toan-lop-2-phep-cong-co-nho-trong-pham-vi-100-cuc-de-dang\/#Dang_3_Giai_toan_co_loi_giai\" >D\u1ea1ng 3: Gi\u1ea3i to\u00e1n c\u00f3 l\u1eddi gi\u1ea3i<\/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\/giup-be-hoc-toan-lop-2-phep-cong-co-nho-trong-pham-vi-100-cuc-de-dang\/#Dang_4_So_sanh\" >D\u1ea1ng 4: So s\u00e1nh<\/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\/giup-be-hoc-toan-lop-2-phep-cong-co-nho-trong-pham-vi-100-cuc-de-dang\/#Dang_5_Tim_x_toan_lop_2\" >D\u1ea1ng 5: T\u00ecm x to\u00e1n l\u1edbp 2<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-8\" href=\"https:\/\/www.ckconitsha.com\/vn\/giup-be-hoc-toan-lop-2-phep-cong-co-nho-trong-pham-vi-100-cuc-de-dang\/#Bi_quyet_giup_be_hoc_toan_lop_2_phep_cong_co_nho_hieu_qua\" >B\u00ed quy\u1ebft gi\u00fap b\u00e9 h\u1ecdc to\u00e1n l\u1edbp 2 ph\u00e9p c\u1ed9ng c\u00f3 nh\u1edb hi\u1ec7u qu\u1ea3<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-9\" href=\"https:\/\/www.ckconitsha.com\/vn\/giup-be-hoc-toan-lop-2-phep-cong-co-nho-trong-pham-vi-100-cuc-de-dang\/#Tao_nen_tang_toan_hoc_cho_be_cung_Shining_Home_%E2%80%93_Gia_dinh_Anh_Ngu_Math\" >T\u1ea1o n\u1ec1n t\u1ea3ng to\u00e1n h\u1ecdc cho b\u00e9 c\u00f9ng Shining Home &#8211; Gia \u0111\u00ecnh Anh Ng\u1eef Math<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-10\" href=\"https:\/\/www.ckconitsha.com\/vn\/giup-be-hoc-toan-lop-2-phep-cong-co-nho-trong-pham-vi-100-cuc-de-dang\/#Su_dung_cac_dung_cu_ho_tro_tinh_toan\" >S\u1eed d\u1ee5ng c\u00e1c d\u1ee5ng c\u1ee5 h\u1ed7 tr\u1ee3 t\u00ednh to\u00e1n<\/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\/giup-be-hoc-toan-lop-2-phep-cong-co-nho-trong-pham-vi-100-cuc-de-dang\/#Cung_be_nam_vung_cac_dang_toan_cong_co_nho_lien_quan\" >C\u00f9ng b\u00e9 n\u1eafm v\u1eefng c\u00e1c d\u1ea1ng to\u00e1n c\u1ed9ng c\u00f3 nh\u1edb li\u00ean quan<\/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\/giup-be-hoc-toan-lop-2-phep-cong-co-nho-trong-pham-vi-100-cuc-de-dang\/#Dong_hanh_cung_be_thuc_hanh_thuong_xuyen\" >\u0110\u1ed3ng h\u00e0nh c\u00f9ng b\u00e9 th\u1ef1c h\u00e0nh th\u01b0\u1eddng xuy\u00ean<\/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\/giup-be-hoc-toan-lop-2-phep-cong-co-nho-trong-pham-vi-100-cuc-de-dang\/#Hoc_toan_phep_cong_co_nho_thong_qua_tro_choi\" >H\u1ecdc to\u00e1n ph\u00e9p c\u1ed9ng c\u00f3 nh\u1edb th\u00f4ng qua tr\u00f2 ch\u01a1i<\/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\/giup-be-hoc-toan-lop-2-phep-cong-co-nho-trong-pham-vi-100-cuc-de-dang\/#Hoc_cac_thu_thuat_tinh_nhanh_cho_tre\" >H\u1ecdc c\u00e1c th\u1ee7 thu\u1eadt t\u00ednh nhanh cho tr\u1ebb<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-15\" href=\"https:\/\/www.ckconitsha.com\/vn\/giup-be-hoc-toan-lop-2-phep-cong-co-nho-trong-pham-vi-100-cuc-de-dang\/#Mot_so_bai_tap_toan_lop_2_phep_cong_co_nho_trong_pham_vi_100_de_be_tu_luyen\" >M\u1ed9t s\u1ed1 b\u00e0i t\u1eadp to\u00e1n l\u1edbp 2 ph\u00e9p c\u1ed9ng c\u00f3 nh\u1edb trong ph\u1ea1m vi 100 \u0111\u1ec3 b\u00e9 t\u1ef1 luy\u1ec7n<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-16\" href=\"https:\/\/www.ckconitsha.com\/vn\/giup-be-hoc-toan-lop-2-phep-cong-co-nho-trong-pham-vi-100-cuc-de-dang\/#Mot_so_luu_y_khi_bo_me_day_be_hoc_toan_phep_cong_co_nho_pham_vi_100\" >M\u1ed9t s\u1ed1 l\u01b0u \u00fd khi b\u1ed1 m\u1eb9 d\u1ea1y b\u00e9 h\u1ecdc to\u00e1n ph\u00e9p c\u1ed9ng c\u00f3 nh\u1edb ph\u1ea1m vi 100<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-17\" href=\"https:\/\/www.ckconitsha.com\/vn\/giup-be-hoc-toan-lop-2-phep-cong-co-nho-trong-pham-vi-100-cuc-de-dang\/#Ket_luan\" >K\u1ebft lu\u1eadn<\/a><\/li><\/ul><\/nav><\/div>\n<\/p>\n<p>To\u00e1n l\u1edbp 2 ph\u00e9p c\u1ed9ng c\u00f3 nh\u1edb trong ph\u1ea1m vi 100 l\u00e0 ki\u1ebfn th\u1ee9c c\u01a1 b\u1ea3n c\u00e1c con s\u1ebd \u0111\u01b0\u1ee3c l\u00e0m quen, \u0111\u01b0\u1ee3c h\u1ecdc. Nh\u01b0ng \u0111\u1ec3 gi\u00fap b\u00e9 chinh ph\u1ee5c ki\u1ebfn th\u1ee9c n\u00e0y hi\u1ec7u qu\u1ea3, b\u1ed1 m\u1eb9 c\u1ea7n gi\u00fap b\u00e9 n\u1eafm v\u1eefng nh\u1eefng d\u1ea1ng to\u00e1n li\u00ean quan v\u00e0 nh\u1eefng b\u00ed quy\u1ebft h\u1ecdc m\u00e0 Shining Home &#8211; Gia \u0111\u00ecnh Anh Ng\u1eef chia s\u1ebb ngay sau \u0111\u00e2y.<\/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 kh\u1ea3 n\u0103ng ng\u00f4n ng\u1eef c\u1ee7a m\u00ecnh th\u00f4ng qua c\u00e1c \u1ee9ng d\u1ee5ng h\u1ecdc t\u1eadp c\u1ee7a Shining Home &#8211; Gia \u0111\u00ecnh Anh Ng\u1eef<\/p>\n<p class=\"description\">\u0110\u0103ng k\u00fd ngay \u0111\u1ec3 \u0111\u01b0\u1ee3c Shining Home &#8211; Gia \u0111\u00ecnh Anh Ng\u1eef t\u01b0 v\u1ea5n mi\u1ec5n ph\u00ed v\u1ec1 s\u1ea3n ph\u1ea9m v\u00e0 l\u1ed9 tr\u00ecnh h\u1ecdc cho con.<\/p>\n<p>                                                                            *Vui l\u00f2ng ki\u1ec3m tra l\u1ea1i h\u1ecd t\u00ean<\/p>\n<p>                                                                            *Vui l\u00f2ng ki\u1ec3m tra l\u1ea1i S\u0110T<\/p>\n<p>                                                                    \u0110\u0103ng K\u00fd T\u01b0 V\u1ea5n Mi\u1ec5n Ph\u00ed<\/p>\n<h2 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Nhung_kho_khan_khi_be_hoc_phep_cong_co_nho_trong_pham_vi_100\"><\/span>Nh\u1eefng kh\u00f3 kh\u0103n khi b\u00e9 h\u1ecdc ph\u00e9p c\u1ed9ng c\u00f3 nh\u1edb trong ph\u1ea1m vi 100<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p dir=\"ltr\">Khi hi\u1ec3u \u0111\u01b0\u1ee3c to\u00e1n l\u1edbp 2 ph\u00e9p c\u1ed9ng c\u00f3 nh\u1edb l\u00e0 g\u00ec? ch\u1eafc h\u1eb3n b\u00e9 s\u1ebd g\u1eb7p nhi\u1ec1u kh\u00f3 kh\u0103n h\u01a1n so v\u1edbi vi\u1ec7c h\u1ecdc ph\u00e9p c\u1ed9ng kh\u00f4ng nh\u1edb th\u00f4ng th\u01b0\u1eddng. \u0110\u1eb7c bi\u1ec7t l\u00e0 khi:<\/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\/phep-cong-co-nho-pham-vi-100-1.jpg\" alt=\"Khi th\u1ef1c hi\u1ec7n ph\u00e9p c\u1ed9ng c\u00f3 nh\u1edb nhi\u1ec1u b\u00e9 v\u1eabn l\u00e0m sai. (\u1ea2nh: S\u01b0u t\u1ea7m internet)\" width=\"100%\"><\/p>\n<ul>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">B\u00e9 ch\u01b0a hi\u1ec3u th\u1ebf n\u00e0o l\u00e0 ph\u00e9p c\u1ed9ng c\u00f3 nh\u1edb: V\u00ec khi b\u00e9 kh\u00f4ng hi\u1ec3u \u0111\u01b0\u1ee3c quy t\u1eafc \u201cc\u1ed9ng c\u00f3 nh\u1edb\u201d \u1edf ph\u00e9p t\u00ednh, ch\u1ec9 c\u1ea7n sai 1 s\u1ed1 l\u00e0 sai c\u1ea3 ph\u00e9p to\u00e1n.<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">B\u00e9 ch\u01b0a n\u1eafm r\u00f5 c\u00e1c s\u1ed1 \u0111\u1ebfm trong ph\u1ea1m vi 100: Nhi\u1ec1u b\u00e9 l\u00ean l\u1edbp 2 v\u1eabn ch\u01b0a \u0111\u1ebfm s\u00e0nh s\u00f5i c\u00e1c s\u1ed1 trong ph\u1ea1m vi 100, n\u00ean khi l\u00e0m b\u00e0i t\u1eadp b\u00e9 c\u0169ng d\u1ec5 d\u1eabn \u0111\u1ebfn vi\u1ec7c gi\u1ea3i to\u00e1n sai.<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">Nhi\u1ec1u d\u1ea1ng to\u00e1n khi\u1ebfn con c\u1ea3m th\u1ea5y kh\u00f3: V\u1edbi ph\u00e9p to\u00e1n c\u1ed9ng c\u00f3 nh\u1edb c\u00f3 nhi\u1ec1u d\u1ea1ng b\u00e0i t\u1eadp t\u1eeb t\u00ednh nh\u1ea9m, \u0111\u1eb7t t\u00ednh r\u1ed3i t\u00ednh, t\u00ecm x, so s\u00e1nh,\u2026 n\u00ean nhi\u1ec1u b\u00e9 g\u1eb7p kh\u00f3 kh\u0103n khi gi\u1ea3i b\u00e0i t\u1eadp.<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">C\u00e1c s\u1ed1 trong ph\u1ea1m vi 100 kh\u00e1 l\u1edbn n\u00ean d\u1ec5 t\u00ednh to\u00e1n nh\u1ea7m: Kh\u00f4ng nh\u01b0 c\u00e1c m\u00f4n h\u1ecdc kh\u00e1c, v\u1edbi to\u00e1n h\u1ecdc n\u1ebfu ch\u1ec9 nh\u1ea7m l\u1eabn 1 s\u1ed1 c\u0169ng khi\u1ebfn ph\u00e9p t\u00ednh sai k\u1ebft qu\u1ea3, n\u00ean v\u1edbi c\u00e1c s\u1ed1 trong ph\u1ea1m vi 100 kh\u00e1 nhi\u1ec1u n\u00ean b\u00e9 kh\u00f3 tr\u00e1nh kh\u1ecfi vi\u1ec7c l\u00e0m to\u00e1n sai.<\/p>\n<\/li>\n<\/ul>\n<h2 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"5_dang_toan_lop_2_khi_hoc_phep_cong_co_nho_pham_vi_100\"><\/span>5 d\u1ea1ng to\u00e1n l\u1edbp 2 khi h\u1ecdc ph\u00e9p c\u1ed9ng c\u00f3 nh\u1edb ph\u1ea1m vi 100<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p dir=\"ltr\">V\u1edbi to\u00e1n ph\u00e9p c\u1ed9ng c\u00f3 nh\u1edb l\u1edbp 2 trong ph\u1ea1m vi 100, c\u00e1c em th\u01b0\u1eddng s\u1ebd \u0111\u01b0\u1ee3c l\u00e0m quen v\u1edbi c\u00e1c d\u1ea1ng b\u00e0i t\u1eadp sau \u0111\u00e2y:<\/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\/phep-cong-co-nho-pham-vi-100-2.jpg\" alt=\"C\u00f3 nhi\u1ec1u d\u1ea1ng to\u00e1n v\u1ec1 ph\u00e9p c\u1ed9ng c\u00f3 nh\u1edb kh\u00e1c nhau. (\u1ea2nh: S\u01b0u t\u1ea7m internet)\" width=\"100%\"><\/p>\n<h3 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Dang_1_Tinh_nham\"><\/span>D\u1ea1ng 1: T\u00ednh nh\u1ea9m<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p dir=\"ltr\">\u0110\u00e2y \u0111\u01b0\u1ee3c xem l\u00e0 d\u1ea1ng to\u00e1n c\u01a1 b\u1ea3n, khi c\u00e1c em t\u00ednh to\u00e1n ph\u00e9p c\u1ed9ng trong ph\u1ea1m vi 100 theo h\u00e0ng ngang theo th\u1ee9 t\u1ef1 t\u1eeb ph\u1ea3i sang tr\u00e1i nh\u01b0 th\u00f4ng th\u01b0\u1eddng.<\/p>\n<p dir=\"ltr\"><em>V\u00ed d\u1ee5: 58 + 34 = ?<\/em><\/p>\n<p dir=\"ltr\"><em>\u0110\u1ea7u ti\u00ean, ta l\u1ea5y 8 + 4 = 12, vi\u1ebft 2 nh\u1edb 1.<\/em><\/p>\n<p dir=\"ltr\"><em>Ti\u1ebfp \u0111\u1ebfn, 5 + 3 = 8, nh\u1edb 1 c\u1ee7a h\u00e0ng \u0111\u01a1n v\u1ecb l\u00e0 \u0111\u01b0\u1ee3c 9, vi\u1ebft 9<\/em><\/p>\n<p dir=\"ltr\"><em>K\u1ebft qu\u1ea3: 58 + 34 = 92.<\/em><\/p>\n<h3 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Dang_2_Dat_tinh_roi_tinh\"><\/span>D\u1ea1ng 2: \u0110\u1eb7t t\u00ednh r\u1ed3i t\u00ednh<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p dir=\"ltr\">\u0110\u00e2y c\u0169ng l\u00e0 d\u1ea1ng b\u00e0i t\u1eadp to\u00e1n l\u1edbp 2 l\u00e0m ph\u00e9p t\u00ednh c\u1ed9ng c\u00f3 nh\u1edb theo h\u00e0ng d\u1ecdc, c\u00e1c em c\u0169ng s\u1ebd th\u1ef1c hi\u1ec7n theo th\u1ee9 t\u1ef1 t\u1eeb ph\u1ea3i sang tr\u00e1i \u0111\u1ec3 t\u00ecm \u0111\u00e1p \u00e1n ch\u00ednh x\u00e1c.<\/p>\n<p dir=\"ltr\"><em>V\u00ed d\u1ee5: \u0110\u1eb7t t\u00ednh r\u1ed3i t\u00ednh<\/em><\/p>\n<p dir=\"ltr\"><em>45<\/em><\/p>\n<p dir=\"ltr\"><em>+<\/em><\/p>\n<p dir=\"ltr\"><em>29<\/em><\/p>\n<p dir=\"ltr\"><em>&#8212;-<\/em><\/p>\n<p dir=\"ltr\"><em>\u2026<\/em><\/p>\n<p dir=\"ltr\"><em>Gi\u1ea3i:<\/em><\/p>\n<p dir=\"ltr\"><em>Ta c\u00f3 5 + 9 = 14, h\u1ea1 4 xu\u1ed1ng nh\u1edb 1<\/em><\/p>\n<p dir=\"ltr\"><em>Ti\u1ebfp \u0111\u1ebfn, 4 + 2 = 6 nh\u1edb 1 \u0111\u01b0\u1ee3c 7, vi\u1ebft 7.<\/em><\/p>\n<p dir=\"ltr\"><em>K\u1ebft qu\u1ea3:<\/em><\/p>\n<p dir=\"ltr\"><em>45<\/em><\/p>\n<p dir=\"ltr\"><em>+<\/em><\/p>\n<p dir=\"ltr\"><em>29<\/em><\/p>\n<p dir=\"ltr\"><em>&#8212;-<\/em><\/p>\n<p dir=\"ltr\"><em>74<\/em><\/p>\n<h3 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Dang_3_Giai_toan_co_loi_giai\"><\/span>D\u1ea1ng 3: Gi\u1ea3i to\u00e1n c\u00f3 l\u1eddi gi\u1ea3i<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p dir=\"ltr\">V\u1edbi d\u1ea1ng b\u00e0i t\u1eadp n\u00e0y h\u1ecdc sinh ph\u1ea3i \u0111\u1ecdc, ph\u00e2n t\u00edch k\u1ef9 \u0111\u1ec1 b\u00e0i \u0111\u00e3 cho nh\u1eefng d\u1eef ki\u1ec7n n\u00e0o, y\u00eau c\u1ea7u t\u00ednh g\u00ec? \u0110\u1ec3 t\u1eeb \u0111\u00f3 \u0111\u01b0a ra \u0111\u00e1p \u00e1n ch\u00ednh x\u00e1c nh\u1ea5t.<\/p>\n<p dir=\"ltr\"><em>V\u00ed d\u1ee5: M\u1ed9t trang tr\u1ea1i c\u00f3 28 con d\u00ea \u0111en v\u00e0 14 con d\u00ea tr\u1eafng. H\u1ecfi trang tr\u1ea1i \u0111\u00f3 c\u00f3 t\u1ea5t c\u1ea3 bao nhi\u00eau con d\u00ea?<\/em><\/p>\n<p dir=\"ltr\"><em>L\u1eddi gi\u1ea3i:<\/em><\/p>\n<p dir=\"ltr\"><em>Trang tr\u1ea1i c\u00f3 t\u1ed5ng s\u1ed1 d\u00ea l\u00e0:<\/em><\/p>\n<p dir=\"ltr\"><em>28 + 14 = 42 (Con)<\/em><\/p>\n<p dir=\"ltr\"><em>\u0110\u00e1p s\u1ed1: 42 con.<\/em><\/p>\n<h3 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Dang_4_So_sanh\"><\/span>D\u1ea1ng 4: So s\u00e1nh<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p dir=\"ltr\">\u1ede d\u1ea1ng b\u00e0i t\u1eadp so s\u00e1nh, s\u1ebd cho 2 ph\u00e9p t\u00ednh c\u1ed9ng c\u00f3 nh\u1edb trong ph\u1ea1m vi 100 kh\u00e1c nhau, y\u00eau c\u1ea7u h\u1ecdc sinh t\u00ednh to\u00e1n v\u00e0 \u0111i\u1ec1n d\u1ea5u &gt;, &lt;, = sao cho ch\u00ednh x\u00e1c.<\/p>\n<p dir=\"ltr\"><em>V\u00ed d\u1ee5: 34 + 56 \u2026 52 + 19<\/em><\/p>\n<p dir=\"ltr\"><em>Gi\u1ea3i:<\/em><\/p>\n<p dir=\"ltr\"><em>Ta c\u00f3: 34 + 56 = 80<\/em><\/p>\n<p dir=\"ltr\"><em>52 + 19 = 71<\/em><\/p>\n<p dir=\"ltr\"><em>Suy ra, 34 + 56 &gt; 52 + 19<\/em><\/p>\n<h3 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Dang_5_Tim_x_toan_lop_2\"><\/span>D\u1ea1ng 5: T\u00ecm x to\u00e1n l\u1edbp 2<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p dir=\"ltr\">\u0110\u00e2y l\u00e0 d\u1ea1ng b\u00e0i t\u1eadp m\u00e0 h\u1ecdc sinh l\u1edbp 2 hay c\u00e1c l\u1edbp cao h\u01a1n s\u1ebd \u0111\u01b0\u1ee3c h\u1ecdc, l\u00e0m quen v\u00e0 gi\u1ea3i. \u0110\u1ec3 gi\u1ea3i b\u00e0i t\u1eadp n\u00e0y, c\u00e1c em c\u1ea7n ph\u1ea3i x\u00e1c \u0111\u1ecbnh gi\u00e1 tr\u1ecb c\u1ee7a x c\u1ea7n t\u00ecm l\u00e0 bao nhi\u00eau th\u00f4ng qua vi\u1ec7c th\u1ef1c hi\u1ec7n ph\u00e9p t\u00ednh.<\/p>\n<p dir=\"ltr\"><em>V\u00ed d\u1ee5: x \u2013 27 = 45<\/em><\/p>\n<p dir=\"ltr\"><em>Suy ra, x = 45 + 27 = 72.<\/em><\/p>\n<p dir=\"ltr\"><em><\/em><\/p>\n<h2 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Bi_quyet_giup_be_hoc_toan_lop_2_phep_cong_co_nho_hieu_qua\"><\/span>B\u00ed quy\u1ebft gi\u00fap b\u00e9 h\u1ecdc to\u00e1n l\u1edbp 2 ph\u00e9p c\u1ed9ng c\u00f3 nh\u1edb hi\u1ec7u qu\u1ea3<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p dir=\"ltr\">\u0110\u1ec3 gi\u00fap c\u00e1c em h\u1ecdc t\u1ed1t ki\u1ebfn th\u1ee9c ph\u00e9p t\u00ednh c\u1ed9ng n\u00e0y, d\u01b0\u1edbi \u0111\u00e2y l\u00e0 m\u1ed9t s\u1ed1 ph\u01b0\u01a1ng ph\u00e1p d\u1ea1y b\u00e9 h\u1ecdc to\u00e1n m\u00e0 m\u1ecdi ng\u01b0\u1eddi c\u00f3 th\u1ec3 tham kh\u1ea3o th\u00eam:<\/p>\n<h3 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Tao_nen_tang_toan_hoc_cho_be_cung_Shining_Home_%E2%80%93_Gia_dinh_Anh_Ngu_Math\"><\/span>T\u1ea1o n\u1ec1n t\u1ea3ng to\u00e1n h\u1ecdc cho b\u00e9 c\u00f9ng Shining Home &#8211; Gia \u0111\u00ecnh Anh Ng\u1eef Math<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p dir=\"ltr\">Vi\u1ec7c d\u1ea1y b\u00e9 h\u1ecdc to\u00e1n ph\u00e9p c\u1ed9ng trong ph\u1ea1m vi 100 t\u01b0\u1edfng ch\u1eebng l\u00e0 \u0111\u01a1n gi\u1ea3n, nh\u01b0ng nhi\u1ec1u b\u00e9 v\u1eabn l\u00e0m sai, c\u0169ng nh\u01b0 kh\u00f4ng n\u1eafm ch\u1eafc \u0111\u01b0\u1ee3c n\u1ec1n t\u1ea3ng d\u1eabn t\u1edbi vi\u1ec7c khi h\u1ecdc ki\u1ebfn th\u1ee9c kh\u00f3 h\u01a1n con kh\u00f4ng bi\u1ebft th\u1ef1c hi\u1ec7n.<\/p>\n<p dir=\"ltr\">Nguy\u00ean nh\u00e2n m\u1ed9t ph\u1ea7n l\u00e0 do ph\u01b0\u01a1ng ph\u00e1p d\u1ea1y c\u1ee7a b\u1ed1 m\u1eb9 ch\u01b0a th\u1ef1c s\u1ef1 ph\u00f9 h\u1ee3p, c\u0169ng nh\u01b0 kh\u00f4ng t\u1ea1o \u0111\u01b0\u1ee3c s\u1ef1 h\u1ee9ng th\u00fa cho b\u00e9 trong qu\u00e1 tr\u00ecnh h\u1ecdc to\u00e1n. Ch\u00ednh v\u00ec v\u1eady, \u0111\u1ec3 gi\u00fap b\u1ed1 m\u1eb9 gi\u1ea3i quy\u1ebft \u0111\u01b0\u1ee3c v\u1ea5n \u0111\u1ec1 n\u00e0y, \u1ee9ng d\u1ee5ng d\u1ea1y to\u00e1n ti\u1ebfng Anh Shining Home &#8211; Gia \u0111\u00ecnh Anh Ng\u1eef Math \u0111\u00e3 ra \u0111\u1eddi. V\u1edbi \u0111a d\u1ea1ng ph\u01b0\u01a1ng ph\u00e1p d\u1ea1y h\u1ecdc t\u00edch c\u1ef1c k\u1ebft h\u1ee3p \u0111\u1ea3m b\u1ea3o s\u1ebd gi\u00fap b\u00e9 ph\u00e1t tri\u1ec3n tr\u00ed kh\u1ea3 n\u0103ng t\u01b0 duy trong to\u00e1n h\u1ecdc c\u1ee7a b\u00e9 hi\u1ec7u qu\u1ea3 nh\u1ea5t.<\/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\/phep-cong-co-nho-pham-vi-100-3.jpg\" alt=\"H\u1ecdc to\u00e1n th\u00fa v\u1ecb c\u00f9ng v\u1edbi Shining Home - Gia \u0111\u00ecnh Anh Ng\u1eef Math. (\u1ea2nh: Shining Home - Gia \u0111\u00ecnh Anh Ng\u1eef)\" width=\"100%\"><\/p>\n<p dir=\"ltr\">C\u1ee5 th\u1ec3, Shining Home &#8211; Gia \u0111\u00ecnh Anh Ng\u1eef Math s\u1ebd cung c\u1ea5p h\u01a1n 400 b\u00e0i h\u1ecdc \u0111\u01b0\u1ee3c m\u00f4 t\u1ea3 b\u1eb1ng h\u00ecnh \u1ea3nh, video sinh \u0111\u1ed9ng, ng\u1ed9 ngh\u0129nh d\u1ef1a tr\u00ean 60 ch\u1ee7 \u0111\u1ec1 to\u00e1n c\u1ee7a 7 chuy\u00ean \u0111\u1ec1 t\u1eeb s\u1ed1, ph\u00e9p t\u00ednh, \u0111o l\u01b0\u1eddng,\u2026 \u0110\u1ea3m b\u1ea3o b\u00e9 s\u1ebd n\u1eafm v\u1eefng \u0111\u01b0\u1ee3c ki\u1ebfn th\u1ee9c m\u1ed9t c\u00e1ch ch\u1ea5t l\u01b0\u1ee3ng nh\u1ea5t.<\/p>\n<p dir=\"ltr\">Kh\u00f4ng ch\u1ec9 \u0111\u01a1n thu\u1ea7n vi\u1ec7c truy\u1ec1n th\u1ee5 ki\u1ebfn th\u1ee9c, t\u1ea1i Shining Home &#8211; Gia \u0111\u00ecnh Anh Ng\u1eef Math c\u00f2n cung c\u1ea5p h\u01a1n 10.000 ho\u1ea1t \u0111\u1ed9ng t\u01b0\u01a1ng t\u00e1c kh\u00e1c nhau \u0111\u01b0\u1ee3c c\u1eadp nh\u1eadt m\u1ed7i tu\u1ea7n. \u0110\u1ec3 qua \u0111\u00f3, b\u00e9 s\u1ebd \u0111\u01b0\u1ee3c th\u1ef1c h\u00e0nh, t\u01b0\u01a1ng t\u00e1c nhi\u1ec1u h\u01a1n \u0111\u1ec3 hi\u1ec3u r\u00f5 b\u1ea3n ch\u1ea5t c\u1ee7a to\u00e1n h\u1ecdc \u0111\u1ec3 gi\u1ea3i b\u00e0i t\u1eadp v\u00e0 \u00e1p d\u1ee5ng trong th\u1ef1c ti\u1ec5n. \u0110i\u1ec1u n\u00e0y tr\u00e1nh tr\u01b0\u1eddng h\u1ee3p b\u00e9 h\u1ecdc v\u1eb9t, kh\u00f4ng ghi nh\u1edb ki\u1ebfn th\u1ee9c hay h\u1ecdc tr\u01b0\u1edbc qu\u00ean sau.<\/p>\n<p dir=\"ltr\">\u0110i k\u00e8m v\u1edbi \u0111\u00f3, Shining Home &#8211; Gia \u0111\u00ecnh Anh Ng\u1eef c\u00f2n cung c\u1ea5p th\u00eam s\u00e1ch b\u00e0i t\u1eadp b\u1ed5 tr\u1ee3 Shining Home &#8211; Gia \u0111\u00ecnh Anh Ng\u1eef Math Workbook, \u0111\u1ec3 qua \u0111\u00f3 gi\u00fap b\u00e9 v\u1eadn d\u1ee5ng ki\u1ebfn th\u1ee9c m\u00ecnh \u0111\u00e3 h\u1ecdc \u0111\u1ec3 tham gia c\u00e1c ho\u1ea1t \u0111\u1ed9ng th\u1ef1c h\u00e0nh nhi\u1ec1u h\u01a1n nh\u01b0 t\u00ednh to\u00e1n, c\u1eaft, d\u00e1n, v\u1ebd,\u2026 \u0110\u1ec3 qua \u0111\u00f3 gi\u00fap con v\u1eeba ph\u00e1t tri\u1ec3n k\u1ef9 n\u0103ng h\u1ecdc to\u00e1n, v\u1eeba v\u1eadn \u0111\u1ed9ng tinh, v\u1eadn \u0111\u1ed9ng th\u00f4 hi\u1ec7u qu\u1ea3.<\/p>\n<p dir=\"ltr\">Ch\u01b0a k\u1ec3, v\u1edbi Shining Home &#8211; Gia \u0111\u00ecnh Anh Ng\u1eef Math c\u00e1c con c\u00f2n \u0111\u01b0\u1ee3c h\u1ecdc to\u00e1n ho\u00e0n to\u00e0n b\u1eb1ng ti\u1ebfng Anh, \u0111\u1ec3 qua \u0111\u00f3 b\u00e9 v\u1eeba \u0111\u01b0\u1ee3c h\u01b0\u1edbng d\u1eabn h\u1ecdc to\u00e1n, k\u1ebft h\u1ee3p r\u00e8n luy\u1ec7n ngo\u1ea1i ng\u1eef hi\u1ec7u qu\u1ea3, ti\u1ebft ki\u1ec7m nh\u1ea5t.<\/p>\n<p dir=\"ltr\">T\u00ecm hi\u1ec3u th\u00eam v\u1ec1 Shining Home &#8211; Gia \u0111\u00ecnh Anh Ng\u1eef Math t\u1ea1i:<\/p>\n<p dir=\"ltr\" style=\"text-align: center\"><iframe loading=\"lazy\" title=\"Gi\u1edbi thi\u1ec7u \u1ee9ng d\u1ee5ng Monkey Math\" width=\"1020\" height=\"574\" src=\"https:\/\/www.youtube.com\/embed\/7DsjpvHFrOs?feature=oembed\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\" referrerpolicy=\"strict-origin-when-cross-origin\" allowfullscreen><\/iframe><\/p>\n<p dir=\"ltr\">T\u1ea3i Shining Home &#8211; Gia \u0111\u00ecnh Anh Ng\u1eef Math cho \u0111i\u1ec7n tho\u1ea1i Android<\/p>\n<p dir=\"ltr\">T\u1ea3i 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=\"Su_dung_cac_dung_cu_ho_tro_tinh_toan\"><\/span>S\u1eed d\u1ee5ng c\u00e1c d\u1ee5ng c\u1ee5 h\u1ed7 tr\u1ee3 t\u00ednh to\u00e1n<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p dir=\"ltr\">\u0110\u1ec3 gi\u00fap b\u00e9 h\u1ecdc to\u00e1n c\u1ed9ng hi\u1ec7u qu\u1ea3 h\u01a1n, b\u1ed1 m\u1eb9 c\u00f3 th\u1ec3 s\u1eed d\u1ee5ng c\u00e1c \u0111\u1ed3 d\u00f9ng h\u1ecdc to\u00e1n hay c\u00e1c \u0111\u1ed3 v\u1eadt xung quanh \u0111\u1ec3 l\u00e0m c\u00f4ng c\u1ee5 h\u1ed7 tr\u1ee3 cho b\u00e9.<\/p>\n<p dir=\"ltr\">\u0110\u1eb7c bi\u1ec7t, v\u1edbi ph\u00e9p to\u00e1n c\u1ed9ng trong ph\u1ea1m vi 100, b\u1ed1 m\u1eb9 c\u00f3 th\u1ec3 d\u00f9ng que t\u00ednh, b\u1ed9 d\u1ee5ng c\u1ee5 h\u1ecdc to\u00e1n l\u1edbp 2, hay l\u1ea5y c\u00e1c v\u00ed d\u1ee5 li\u00ean quan t\u1edbi th\u1ef1c ti\u1ec5n nh\u01b0 \u0111i ch\u1ee3, t\u00ednh to\u00e1n hoa qu\u1ea3,\u2026 Khi c\u00f3 c\u00f4ng c\u1ee5 h\u1ed7 tr\u1ee3 nh\u01b0 v\u1eady s\u1ebd gi\u00fap vi\u1ec7c h\u1ecdc ph\u00e9p t\u00ednh c\u1ee7a b\u00e9 hi\u1ec7u qu\u1ea3 h\u01a1n.<\/p>\n<h3 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Cung_be_nam_vung_cac_dang_toan_cong_co_nho_lien_quan\"><\/span>C\u00f9ng b\u00e9 n\u1eafm v\u1eefng c\u00e1c d\u1ea1ng to\u00e1n c\u1ed9ng c\u00f3 nh\u1edb li\u00ean quan<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p dir=\"ltr\">Nh\u01b0 \u0111\u00e3 ph\u00e2n t\u00edch tr\u00ean, v\u1edbi ph\u00e9p to\u00e1n c\u1ed9ng c\u00f3 nh\u1edb trong ph\u1ea1m vi 100 tr\u00ean c\u00f3 kho\u1ea3ng 5 d\u1ea1ng b\u00e0i t\u1eadp c\u01a1 b\u1ea3n. Ch\u00ednh v\u00ec v\u1eady, b\u1ed1 m\u1eb9 c\u1ea7n cho b\u00e9 th\u1eed s\u1ee9c v\u00e0 l\u00e0m quen v\u1edbi nh\u1eefng d\u1ea1ng b\u00e0i t\u1eadp n\u00e0y, k\u1ebft h\u1ee3p c\u00f9ng vi\u1ec7c th\u1ef1c h\u00e0nh th\u01b0\u1eddng xuy\u00ean \u0111\u1ec3 b\u00e9 hi\u1ec3u v\u00e0 \u00e1p d\u1ee5ng gi\u1ea3i m\u1ed9t c\u00e1ch t\u1ed1t nh\u1ea5t.<\/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\/phep-cong-co-nho-pham-vi-100-4.jpg\" alt=\"Vi\u1ec7c n\u1eafm v\u1eefng ki\u1ebfn th\u1ee9c c\u01a1 b\u1ea3n to\u00e1n r\u1ea5t quan tr\u1ecdng. (\u1ea2nh: S\u01b0u t\u1ea7m internet)\" width=\"100%\"><\/p>\n<h3 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Dong_hanh_cung_be_thuc_hanh_thuong_xuyen\"><\/span>\u0110\u1ed3ng h\u00e0nh c\u00f9ng b\u00e9 th\u1ef1c h\u00e0nh th\u01b0\u1eddng xuy\u00ean<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p dir=\"ltr\">Thay v\u00ec ch\u1ec9 d\u1ea1y b\u00e9 h\u1ecdc to\u00e1n c\u1ed9ng tr\u00ean s\u00e1ch v\u1edf, l\u00fd thuy\u1ebft su\u00f4ng th\u00ec vi\u1ec7c c\u00f9ng b\u00e9 th\u1ef1c h\u00e0nh nhi\u1ec1u h\u01a1n s\u1ebd gia t\u0103ng hi\u1ec7u qu\u1ea3 h\u1ecdc t\u1ed1t h\u01a1n.<\/p>\n<p dir=\"ltr\">Vi\u1ec7c th\u1ef1c h\u00e0nh \u1edf \u0111\u00e2y b\u1ed1 m\u1eb9 c\u00f3 th\u1ec3 \u00e1p d\u1ee5ng nhi\u1ec1u c\u00e1ch nh\u01b0 l\u00e0m b\u00e0i t\u1eadp th\u01b0\u1eddng xuy\u00ean, l\u1ea5y c\u00e1c v\u00ed d\u1ee5 li\u00ean quan t\u1edbi th\u1ef1c ti\u1ec5n v\u00e0 y\u00eau c\u1ea7u b\u00e9 gi\u1ea3i b\u00e0i t\u1eadp, th\u01b0\u1eddng xuy\u00ean \u0111\u1eb7t c\u00e2u h\u1ecfi ph\u00e9p t\u00ednh cho b\u00e9,\u2026<\/p>\n<h3 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Hoc_toan_phep_cong_co_nho_thong_qua_tro_choi\"><\/span>H\u1ecdc to\u00e1n ph\u00e9p c\u1ed9ng c\u00f3 nh\u1edb th\u00f4ng qua tr\u00f2 ch\u01a1i<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p dir=\"ltr\">\u0110\u00e2y l\u00e0 m\u1ed9t trong nh\u1eefng ph\u01b0\u01a1ng ph\u00e1p d\u1ea1y b\u00e9 h\u1ecdc to\u00e1n \u0111\u01b0\u1ee3c nhi\u1ec1u chuy\u00ean gia khuy\u00ean nh\u00e0 tr\u01b0\u1eddng, gi\u00e1o vi\u00ean v\u00e0 b\u1ed1 m\u1eb9 n\u00ean th\u01b0\u1eddng xuy\u00ean \u00e1p d\u1ee5ng. B\u1edfi v\u00ec \u0111\u1ed1i v\u1edbi tr\u1ebb nh\u1ecf vi\u1ec7c h\u1ecdc tr\u00ean s\u00e1ch v\u1edf th\u01b0\u1eddng xuy\u00ean s\u1ebd h\u1ea1n ch\u1ebf kh\u1ea3 n\u0103ng t\u01b0 duy, s\u00e1ng t\u1ea1o v\u00e0 s\u1ef1 h\u1ee9ng th\u00fa c\u1ee7a tr\u1ebb.<\/p>\n<p dir=\"ltr\">Ch\u00ednh v\u00ec v\u1eady, vi\u1ec7c t\u1ed5 ch\u1ee9c c\u00e1c tr\u00f2 ch\u01a1i to\u00e1n h\u1ecdc nh\u01b0 gi\u1ea3i c\u00e2u \u0111\u1ed1 c\u00f3 th\u01b0\u1edfng, \u0111i ch\u1ee3, ch\u01a1i \u0111\u1ed3 h\u00e0ng, s\u1eed d\u1ee5ng b\u1ed9 \u0111\u1ed3 ch\u01a1i h\u1ecdc to\u00e1n,\u2026s\u1ebd gia t\u0103ng s\u1ef1 h\u1ee9ng th\u00fa, ghi nh\u1edb v\u00e0 t\u01b0 duy trong vi\u1ec7c h\u1ecdc to\u00e1n c\u1ee7a b\u00e9 t\u1ed1t 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\/phep-cong-co-nho-pham-vi-100-5.jpg\" alt=\"H\u1ecdc to\u00e1n c\u1ed9ng th\u00f4ng qua tr\u00f2 ch\u01a1i hi\u1ec7u qu\u1ea3. (\u1ea2nh: S\u01b0u t\u1ea7m internet)\" width=\"100%\"><\/p>\n<h3 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Hoc_cac_thu_thuat_tinh_nhanh_cho_tre\"><\/span>H\u1ecdc c\u00e1c th\u1ee7 thu\u1eadt t\u00ednh nhanh cho tr\u1ebb<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p dir=\"ltr\">\u0110\u1ec3 gi\u00fap vi\u1ec7c h\u1ecdc to\u00e1n c\u1ed9ng c\u00f3 nh\u1edb trong ph\u1ea1m vi 100 hi\u1ec7u qu\u1ea3 h\u01a1n, b\u1ed1 m\u1eb9 c\u00f3 th\u1ec3 t\u00ecm hi\u1ec3u nh\u1eefng th\u1ee7 thu\u1eadt t\u00ednh nhanh \u0111\u1ec3 b\u00e9 \u00e1p d\u1ee5ng.<\/p>\n<p dir=\"ltr\">\u0110i\u1ec3n h\u00ecnh nh\u01b0 vi\u1ec7c bi\u1ebfn t\u1ea5t c\u1ea3 c\u00e1c s\u1ed1 th\u00e0nh b\u1ed9i s\u1ed1 c\u1ee7a 10, v\u00ed d\u1ee5 nh\u01b0 v\u1edbi <em>ph\u00e9p t\u00ednh 64 + 28.<\/em><\/p>\n<p dir=\"ltr\"><em>\u0110\u00e2y l\u00e0 ph\u00e9p c\u1ed9ng c\u00f3 nh\u1edb c\u01a1 b\u1ea3n, nh\u01b0ng n\u1ebfu c\u00e1c b\u00e9 l\u00e0m tr\u00f2n ch\u00fang th\u00ec vi\u1ec7c t\u00ednh to\u00e1n s\u1ebd d\u1ec5 h\u01a1n. T\u1eeb \u0111\u00f3, ta bi\u1ebfn 64 th\u00e0nh 70 v\u00e0 28 tr\u1edf th\u00e0nh 30. L\u00fac n\u00e0y ta l\u1ea5y 70 + 30 = 100. \u0110\u1ec3 t\u00ecm \u0111\u01b0\u1ee3c \u0111\u00e1p \u00e1n ban \u0111\u1ea7u, ta x\u00e1c \u0111\u1ecbnh xem \u0111\u00e3 th\u00eam bao nhi\u00eau v\u00e0o s\u1ed1 \u0111\u00f3 \u0111\u1ec3 l\u00e0m tr\u00f2n ch\u00fang v\u00e0 tr\u1eeb \u0111i.<\/em><\/p>\n<p dir=\"ltr\"><em>C\u1ee5 th\u1ec3, 70 \u2013 64 = 6, 30 \u2013 28 = 2. Sau \u0111\u00f3 ta c\u1ed9ng 6 v\u1edbi 2 \u0111\u01b0\u1ee3c 8. L\u00fac n\u00e0y ta l\u1ea5y 100 \u2013 8 = 92. K\u1ebft qu\u1ea3 cu\u1ed1i c\u00f9ng c\u1ee7a 64 + 28 = 92.<\/em><\/p>\n<p dir=\"ltr\">Tuy h\u01a1i r\u01b0\u1eddm r\u00e0, nh\u01b0ng n\u1ebfu v\u1eadn d\u1ee5ng s\u1ef1 t\u01b0 duy khi h\u1ecdc to\u00e1n th\u00ec \u0111\u00e2y l\u00e0 c\u00e1ch t\u00ednh nh\u1ea9m kh\u00e1 hi\u1ec7u qu\u1ea3. Ngo\u00e0i ra, b\u1ed1 m\u1eb9 c\u00f3 th\u1ec3 tham kh\u1ea3o thu\u1eadt to\u00e1n t\u01b0 duy Soroban ho\u1eb7c Finger Math c\u0169ng kh\u00e1 th\u00fa v\u1ecb \u0111\u1ec3 gi\u00fap b\u00e9 h\u1ecdc to\u00e1n t\u1ed1t h\u01a1n.\u00a0<\/p>\n<h2 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Mot_so_bai_tap_toan_lop_2_phep_cong_co_nho_trong_pham_vi_100_de_be_tu_luyen\"><\/span>M\u1ed9t s\u1ed1 b\u00e0i t\u1eadp to\u00e1n l\u1edbp 2 ph\u00e9p c\u1ed9ng c\u00f3 nh\u1edb trong ph\u1ea1m vi 100 \u0111\u1ec3 b\u00e9 t\u1ef1 luy\u1ec7n<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p dir=\"ltr\">D\u01b0\u1edbi \u0111\u00e2y s\u1ebd l\u00e0 m\u1ed9t s\u1ed1 b\u00e0i t\u1eadp to\u00e1n l\u1edbp 2 ph\u00e9p c\u1ed9ng c\u00f3 nh\u1edb ph\u1ea1m vi 100 \u0111\u1ec3 c\u00e1c b\u00e9 luy\u1ec7n t\u1eadp t\u1ea1i nh\u00e0:<\/p>\n<p dir=\"ltr\">B\u00e0i 1: L\u1edbp 2A c\u00f3 34 h\u1ecdc sinh, l\u1edbp 2B c\u00f3 29 h\u1ecdc sinh. T\u00ednh t\u1ed5ng s\u1ed1 h\u1ecdc sinh c\u1ee7a hai l\u1edbp 2A v\u00e0 2B<\/p>\n<p dir=\"ltr\">B\u00e0i 2: An c\u00f3 29 c\u00e1i k\u1eb9o, m\u1eb9 cho An 5 c\u00e1i k\u1eb9o. H\u1ecfi l\u00fac n\u00e0y An c\u00f3 t\u1ea5t c\u1ea3 bao nhi\u00eau c\u00e1i k\u1eb9o?<\/p>\n<p dir=\"ltr\">B\u00e0i 3: L\u1edbp 2A c\u00f3 19 b\u1ea1n nam v\u00e0 18 b\u1ea1n n\u1eef. H\u1ecfi l\u1edbp 2A c\u00f3 t\u1ea5t c\u1ea3 bao nhi\u00eau h\u1ecdc sinh.<\/p>\n<p dir=\"ltr\">B\u00e0i 4: Kh\u00fac g\u1ed7 th\u1ee9 nh\u1ea5t d\u00e0i 17dm, kh\u00fac g\u1ed7 th\u1ee9 hai d\u00e0i 19dm. N\u1ebfu kh\u00fac g\u1ed7 th\u1ee9 ba b\u1eb1ng t\u1ed5ng \u0111\u1ed9 d\u00e0i hai kh\u00fac g\u1ed7 \u0111\u1ea7u th\u00ec kh\u00fac g\u1ed7 th\u1ee9 ba d\u00e0i bao nhi\u00eau \u0111\u1ec1-xi-m\u00e9t?<\/p>\n<p dir=\"ltr\">B\u00e0i 5: \u0110\u1eb7t t\u00ednh r\u1ed3i t\u00ednh<\/p>\n<p dir=\"ltr\">a) 26 + 5<\/p>\n<p dir=\"ltr\">b) 34 + 46<\/p>\n<p dir=\"ltr\">c) 15 + 89<\/p>\n<p dir=\"ltr\">d) 19 + 37<\/p>\n<p dir=\"ltr\">e) 58 + 34<\/p>\n<p dir=\"ltr\">f) 9 + 65<\/p>\n<p dir=\"ltr\">g) 87 + 6<\/p>\n<p dir=\"ltr\">B\u00e0i 6: T\u00ednh nh\u1ea9m<\/p>\n<p dir=\"ltr\">a) 26 + 15 = &#8230;&#8230;..<\/p>\n<p dir=\"ltr\">b) 46 + 47 = &#8230;&#8230;..<\/p>\n<p dir=\"ltr\">c) 9 + 36 = &#8230;&#8230;..<\/p>\n<p dir=\"ltr\">d) 86 + 9 = &#8230;&#8230;..\u00a0<\/p>\n<p dir=\"ltr\">e) 26 + 54 = &#8230;&#8230;..<\/p>\n<p dir=\"ltr\">f) 18+ 65 = &#8230;&#8230;..<\/p>\n<p dir=\"ltr\">g) 29 + 46 = &#8230;&#8230;..<\/p>\n<p dir=\"ltr\">h) 16 + 24 + 13 = &#8230;&#8230;..<\/p>\n<p dir=\"ltr\">i) 19 + 13 + 18 = &#8230;&#8230;..<\/p>\n<p dir=\"ltr\">j) 18 + 42 + 10 = &#8230;&#8230;..<\/p>\n<p dir=\"ltr\">B\u00e0i 7: Vi\u1ebft s\u1ed1 th\u00edch h\u1ee3p v\u00e0o ch\u1ed7 tr\u1ed1ng:<\/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\/phep-cong-co-nho-pham-vi-100-6.jpg\" alt=\"\" width=\"100%\"><\/p>\n<p dir=\"ltr\">B\u00e0i 8: T\u00ecm x, bi\u1ebft<\/p>\n<p dir=\"ltr\">a) x + 34 = 54<\/p>\n<p dir=\"ltr\">b) 38 + x = 68<\/p>\n<p dir=\"ltr\">c) 42 + x = 89<\/p>\n<p dir=\"ltr\">d) x + 62 = 96<\/p>\n<p dir=\"ltr\">e) x + 21 = 26 + 15<\/p>\n<p dir=\"ltr\">f) 22 + x = 39 + 36<\/p>\n<p dir=\"ltr\">g) x + 33 = 37 + 38<\/p>\n<p dir=\"ltr\">h) 51+ x = 46 + 35<\/p>\n<p dir=\"ltr\">B\u00e0i 9: \u0110i\u1ec1n s\u1ed1 th\u00edch h\u1ee3p v\u00e0o \u00f4 tr\u1ed1ng:<\/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\/phep-cong-co-nho-pham-vi-100-7.jpg\" alt=\"\" width=\"100%\"><\/p>\n<p dir=\"ltr\">B\u00e0i 10: \u0110i\u1ec1n d\u1ea5u &gt;, &lt;, = v\u00e0o ch\u1ed7 ch\u1ea5m<\/p>\n<p dir=\"ltr\">a) 23 + 17 \u2026 32 + 9<\/p>\n<p dir=\"ltr\">b) 54 + 18 \u2026 34 + 36<\/p>\n<p dir=\"ltr\">c) 17 + 37 \u2026 23 + 49<\/p>\n<p dir=\"ltr\">d) 28 + 18 \u2026 19 + 27<\/p>\n<p dir=\"ltr\">e) 27 + 15 \u2026 21 + 18<\/p>\n<h2 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Mot_so_luu_y_khi_bo_me_day_be_hoc_toan_phep_cong_co_nho_pham_vi_100\"><\/span>M\u1ed9t s\u1ed1 l\u01b0u \u00fd khi b\u1ed1 m\u1eb9 d\u1ea1y b\u00e9 h\u1ecdc to\u00e1n ph\u00e9p c\u1ed9ng c\u00f3 nh\u1edb ph\u1ea1m vi 100<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p dir=\"ltr\">\u0110\u1ec3 n\u00e2ng cao hi\u1ec7u qu\u1ea3 d\u1ea1y b\u00e9 h\u1ecdc to\u00e1n l\u1edbp 2 c\u1ed9ng c\u00f3 nh\u1edb trong ph\u1ea1m vi 100, b\u1ed1 m\u1eb9 c\u1ea7n l\u01b0u \u00fd m\u1ed9t s\u1ed1 v\u1ea5n \u0111\u1ec1 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\/phep-cong-co-nho-pham-vi-100-8.jpg\" alt=\"Vi\u1ec7c b\u1ed1 m\u1eb9 \u0111\u1ed3ng h\u00e0nh c\u00f9ng con r\u1ea5t quan tr\u1ecdng. (\u1ea2nh: S\u01b0u t\u1ea7m internet)\" width=\"100%\"><\/p>\n<ul>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">\u0110\u1ed3ng h\u00e0nh c\u00f9ng con: Vi\u1ec7c n\u00e0y r\u1ea5t quan tr\u1ecdng \u0111\u1ec3 gi\u00fap b\u00e9 t\u1ef1 tin h\u01a1n trong vi\u1ec7c chia s\u1ebb kh\u00f3 kh\u0103n khi h\u1ecdc to\u00e1n v\u1edbi b\u1ed1 m\u1eb9, gi\u00fap b\u1ed1 m\u1eb9 hi\u1ec3u con c\u00e1i v\u00e0 \u0111\u01b0a ra ph\u01b0\u01a1ng ph\u00e1p h\u1ecdc t\u1eadp ph\u00f9 h\u1ee3p.<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">Ki\u1ec3m tra b\u00e0i v\u1edf tr\u00ean tr\u01b0\u1eddng: Qua \u0111\u00f3 gi\u00fap b\u1ed1 m\u1eb9 bi\u1ebft \u0111\u01b0\u1ee3c n\u0103ng l\u1ef1c h\u1ecdc c\u1ee7a b\u00e9 \u0111\u1ebfn \u0111\u00e2u \u0111\u1ec3 \u0111\u01b0a ra ph\u01b0\u01a1ng ph\u00e1p, c\u00e1ch d\u1ea1y h\u1ecdc ph\u00f9 h\u1ee3p, c\u0169ng nh\u01b0 c\u1ee7ng c\u1ed1 ki\u1ebfn th\u1ee9c b\u00e9 \u0111ang g\u1eb7p kh\u00f3 kh\u0103n k\u1ecbp th\u1eddi.<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">Trao \u0111\u1ed5i v\u1edbi gi\u00e1o vi\u00ean: \u0110\u1ec3 b\u1ed1 m\u1eb9 hi\u1ec3u \u0111\u01b0\u1ee3c vi\u1ec7c h\u1ecdc c\u1ee7a con tr\u00ean tr\u01b0\u1eddng, c\u0169ng v\u1edbi gi\u00e1o vi\u00ean \u0111\u01b0a ra ph\u01b0\u01a1ng \u00e1n h\u1ecdc t\u1ed1t cho b\u00e9.<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">Kh\u00f4ng t\u1ea1o \u00e1p l\u1ef1c trong qu\u00e1 tr\u00ecnh h\u1ecdc cho tr\u1ebb: Vi\u1ec7c \u00e9p b\u00e9 h\u1ecdc nhi\u1ec1u, hay \u0111\u1eb7t n\u1eb7ng v\u1ea5n \u0111\u1ec1 \u0111i\u1ec3m s\u1ed1 con d\u1ec5 b\u1ecb \u00e1p l\u1ef1c, c\u00e0ng ph\u1ea3n t\u00e1c d\u1ee5ng trong vi\u1ec7c d\u1ea1y b\u00e9 h\u1ecdc.<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">Ph\u00e2n b\u1ed5 th\u1eddi gian h\u1ecdc, ch\u01a1i, ng\u1ee7 ngh\u1ec9 h\u1ee3p l\u00fd: Thay v\u00ec y\u00eau c\u1ea7u con h\u1ecdc qu\u00e1 nhi\u1ec1u, b\u1ed1 m\u1eb9 n\u00ean ph\u00e2n chia th\u1eddi gian h\u1ecdc t\u1eadp, ng\u1ee7 ngh\u1ec9, vui ch\u01a1i h\u1ee3p l\u00fd \u0111\u1ec3 tinh th\u1ea7n b\u00e9 \u0111\u01b0\u1ee3c tho\u1ea3i m\u00e1i h\u01a1n.<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">\u0110\u1ea7u t\u01b0 c\u00e1c trang thi\u1ebft b\u1ecb h\u1ecdc t\u1eadp th\u00f4ng minh cho tr\u1ebb: V\u1edbi xu h\u01b0\u1edbng c\u00f4ng ngh\u1ec7 ng\u00e0y c\u00e0ng hi\u1ec7n \u0111\u1ea1i, n\u1ebfu ch\u1ec9 h\u1ecdc tr\u00ean s\u00e1ch v\u1edf b\u00e9 s\u1ebd thua k\u00e9m b\u1ea1n b\u00e8, c\u0169ng nh\u01b0 kh\u00f4ng h\u1ecdc h\u1ecfi th\u00eam ki\u1ebfn th\u1ee9c m\u1edbi. N\u00ean b\u1ed1 m\u1eb9 c\u1ea7n \u0111\u1ea7u t\u01b0 c\u00e1c thi\u1ebft b\u1ecb hi\u1ec7n \u0111\u1ea1i h\u1ed7 tr\u1ee3 vi\u1ec7c h\u1ecdc cho b\u00e9 nh\u01b0 m\u00e1y t\u00ednh, smartphone hay \u1ee9ng d\u1ee5ng to\u00e1n h\u1ecdc\u2026 r\u1ea5t c\u1ea7n thi\u1ebft.<\/p>\n<\/li>\n<\/ul>\n<h2 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Ket_luan\"><\/span>K\u1ebft lu\u1eadn<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<\/p>\n<p dir=\"ltr\">V\u1edbi ki\u1ebfn th\u1ee9c ph\u00e9p c\u1ed9ng c\u00f3 nh\u1edb trong ph\u1ea1m vi 100 l\u00e0 n\u1ec1n t\u1ea3ng quan tr\u1ecdng \u0111\u1ec3 gi\u00fap b\u00e9 t\u00ecm hi\u1ec3u s\u00e2u h\u01a1n v\u1ec1 to\u00e1n h\u1ecdc, c\u0169ng nh\u01b0 \u1ee9ng d\u1ee5ng trong \u0111\u1eddi s\u1ed1ng. N\u00ean b\u1ed1 m\u1eb9 ho\u00e0n to\u00e0n c\u00f3 th\u1ec3 \u00e1p d\u1ee5ng nh\u1eefng b\u00ed quy\u1ebft m\u00e0 Shining Home &#8211; Gia \u0111\u00ecnh Anh Ng\u1eef chia s\u1ebb \u0111\u1ec3 gi\u00fap vi\u1ec7c h\u1ecdc t\u1eadp c\u1ee7a b\u00e9 ng\u00e0y m\u1ed9t t\u1ed1t 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 l\u1edbp 2 ph\u00e9p c\u1ed9ng c\u00f3 nh\u1edb trong ph\u1ea1m vi 100 l\u00e0 ki\u1ebfn th\u1ee9c c\u01a1 b\u1ea3n c\u00e1c con s\u1ebd \u0111\u01b0\u1ee3c l\u00e0m quen, \u0111\u01b0\u1ee3c h\u1ecdc. Nh\u01b0ng \u0111\u1ec3 gi\u00fap b\u00e9 chinh ph\u1ee5c ki\u1ebfn th\u1ee9c n\u00e0y hi\u1ec7u qu\u1ea3, b\u1ed1 m\u1eb9 c\u1ea7n gi\u00fap b\u00e9 n\u1eafm v\u1eefng nh\u1eefng d\u1ea1ng to\u00e1n li\u00ean quan v\u00e0 nh\u1eefng b\u00ed quy\u1ebft h\u1ecdc m\u00e0 Shining Home&#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-17542","post","type-post","status-publish","format-standard","hentry","category-kien-thuc"],"_links":{"self":[{"href":"https:\/\/www.ckconitsha.com\/vn\/wp-json\/wp\/v2\/posts\/17542","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=17542"}],"version-history":[{"count":2,"href":"https:\/\/www.ckconitsha.com\/vn\/wp-json\/wp\/v2\/posts\/17542\/revisions"}],"predecessor-version":[{"id":24127,"href":"https:\/\/www.ckconitsha.com\/vn\/wp-json\/wp\/v2\/posts\/17542\/revisions\/24127"}],"wp:attachment":[{"href":"https:\/\/www.ckconitsha.com\/vn\/wp-json\/wp\/v2\/media?parent=17542"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.ckconitsha.com\/vn\/wp-json\/wp\/v2\/categories?post=17542"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.ckconitsha.com\/vn\/wp-json\/wp\/v2\/tags?post=17542"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}