{"id":17255,"date":"2025-07-04T19:40:05","date_gmt":"2025-07-04T12:40:05","guid":{"rendered":"https:\/\/www.ckconitsha.com\/vn\/?p=17255"},"modified":"2025-07-05T04:35:05","modified_gmt":"2025-07-04T21:35:05","slug":"bat-mi-cach-hoc-bang-tru-co-nho-trong-pham-vi-20-cho-be-hieu-qua","status":"publish","type":"post","link":"https:\/\/www.ckconitsha.com\/vn\/bat-mi-cach-hoc-bang-tru-co-nho-trong-pham-vi-20-cho-be-hieu-qua\/","title":{"rendered":"B\u1eadt m\u00ed c\u00e1ch h\u1ecdc b\u1ea3ng tr\u1eeb c\u00f3 nh\u1edb trong ph\u1ea1m vi 20 cho b\u00e9 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\/bat-mi-cach-hoc-bang-tru-co-nho-trong-pham-vi-20-cho-be-hieu-qua\/#Kho_khan_khi_tre_hoc_toan_trong_vong_20_de_nho\" >Kh\u00f3 kh\u0103n khi tr\u1ebb h\u1ecdc to\u00e1n trong v\u00f2ng 20 \u0111\u1ec3 nh\u1edb<\/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\/bat-mi-cach-hoc-bang-tru-co-nho-trong-pham-vi-20-cho-be-hieu-qua\/#Bang_tru_duoc_ghi_nho_trong_vong_20_chi_tiet\" >B\u1ea3ng tr\u1eeb \u0111\u01b0\u1ee3c ghi nh\u1edb trong v\u00f2ng 20 chi ti\u1ebft<\/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\/bat-mi-cach-hoc-bang-tru-co-nho-trong-pham-vi-20-cho-be-hieu-qua\/#Bi_quyet_de_giup_tre_hoc_ve_diem_tru_va_ghi_nho_trong_vong_20_hieu_qua\" >B\u00ed quy\u1ebft \u0111\u1ec3 gi\u00fap tr\u1ebb h\u1ecdc v\u1ec1 \u0111i\u1ec3m tr\u1eeb v\u00e0 ghi nh\u1edb trong v\u00f2ng 20 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-4\" href=\"https:\/\/www.ckconitsha.com\/vn\/bat-mi-cach-hoc-bang-tru-co-nho-trong-pham-vi-20-cho-be-hieu-qua\/#Xay_dung_mot_nen_tang_toan_hoc_cho_tre_em_voi_toan_hoc_khi\" >X\u00e2y d\u1ef1ng m\u1ed9t n\u1ec1n t\u1ea3ng to\u00e1n h\u1ecdc cho tr\u1ebb em v\u1edbi to\u00e1n h\u1ecdc kh\u1ec9<\/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\/bat-mi-cach-hoc-bang-tru-co-nho-trong-pham-vi-20-cho-be-hieu-qua\/#Giup_tre_hieu_luat_thuc_thi_ngoai_tru_hay_nho_pham_vi_20\" >Gi\u00fap tr\u1ebb hi\u1ec3u lu\u1eadt th\u1ef1c thi ngo\u1ea1i tr\u1eeb, h\u00e3y nh\u1edb ph\u1ea1m vi 20<\/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\/bat-mi-cach-hoc-bang-tru-co-nho-trong-pham-vi-20-cho-be-hieu-qua\/#Hay_de_tre_hoc_cach_loai_tru_toan_tu_co_ban_den_nang_cao\" >H\u00e3y \u0111\u1ec3 tr\u1ebb h\u1ecdc c\u00e1ch lo\u1ea1i tr\u1eeb to\u00e1n t\u1eeb c\u01a1 b\u1ea3n \u0111\u1ebfn n\u00e2ng cao<\/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\/bat-mi-cach-hoc-bang-tru-co-nho-trong-pham-vi-20-cho-be-hieu-qua\/#Thuc_hanh_voi_tre_em_thuc_hanh_nhieu_hon\" >Th\u1ef1c h\u00e0nh v\u1edbi tr\u1ebb em, th\u1ef1c h\u00e0nh nhi\u1ec1u h\u01a1n<\/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\/bat-mi-cach-hoc-bang-tru-co-nho-trong-pham-vi-20-cho-be-hieu-qua\/#Cac_loai_bai_tap_loai_tru_trong_vong_20_co_bo_nho_chung\" >C\u00e1c lo\u1ea1i b\u00e0i t\u1eadp lo\u1ea1i tr\u1eeb trong v\u00f2ng 20 c\u00f3 b\u1ed9 nh\u1edb chung<\/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\/bat-mi-cach-hoc-bang-tru-co-nho-trong-pham-vi-20-cho-be-hieu-qua\/#Mau_1_Tinh_toan\" >M\u1eabu 1: 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-10\" href=\"https:\/\/www.ckconitsha.com\/vn\/bat-mi-cach-hoc-bang-tru-co-nho-trong-pham-vi-20-cho-be-hieu-qua\/#Mau_2_Van_de_co_tu\" >M\u1eabu 2: V\u1ea5n \u0111\u1ec1 c\u00f3 t\u1eeb<\/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\/bat-mi-cach-hoc-bang-tru-co-nho-trong-pham-vi-20-cho-be-hieu-qua\/#Mau_3_Tim_so_con_thieu_trong_phep_tru_dua_tren_diem_tru\" >M\u1eabu 3: T\u00ecm s\u1ed1 c\u00f2n thi\u1ebfu trong ph\u00e9p tr\u1eeb d\u1ef1a tr\u00ean \u0111i\u1ec3m tr\u1eeb<\/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\/bat-mi-cach-hoc-bang-tru-co-nho-trong-pham-vi-20-cho-be-hieu-qua\/#Mau_4_Tinh_gia_tri_cua_bieu_thuc\" >M\u1eabu 4: T\u00ednh gi\u00e1 tr\u1ecb c\u1ee7a bi\u1ec3u th\u1ee9c<\/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\/bat-mi-cach-hoc-bang-tru-co-nho-trong-pham-vi-20-cho-be-hieu-qua\/#Mau_5_So_sanh\" >M\u1eabu 5: So s\u00e1nh<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-14\" href=\"https:\/\/www.ckconitsha.com\/vn\/bat-mi-cach-hoc-bang-tru-co-nho-trong-pham-vi-20-cho-be-hieu-qua\/#Mot_so_bai_tap_tap_the_duc_voi_tri_nho_trong_vong_20_de_em_be_se_thuc_hanh\" >M\u1ed9t s\u1ed1 b\u00e0i t\u1eadp t\u1eadp th\u1ec3 d\u1ee5c v\u1edbi tr\u00ed nh\u1edb trong v\u00f2ng 20 \u0111\u1ec3 em b\u00e9 s\u1ebd th\u1ef1c h\u00e0nh<\/a><\/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\/bat-mi-cach-hoc-bang-tru-co-nho-trong-pham-vi-20-cho-be-hieu-qua\/#Mot_so_ghi_chu_Khi_cha_me_day_con_hoc_toan\" >M\u1ed9t s\u1ed1 ghi ch\u00fa Khi cha m\u1eb9 d\u1ea1y con 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-16\" href=\"https:\/\/www.ckconitsha.com\/vn\/bat-mi-cach-hoc-bang-tru-co-nho-trong-pham-vi-20-cho-be-hieu-qua\/#Ket_luan\" >K\u1ebft lu\u1eadn<\/a><\/li><\/ul><\/nav><\/div>\n<\/p>\n<p>Ngo\u1ea1i tr\u1eeb b\u1ed9 nh\u1edb trong v\u00f2ng 20 l\u00e0 ki\u1ebfn \u200b\u200bth\u1ee9c c\u01a1 b\u1ea3n c\u1ee7a to\u00e1n h\u1ecdc l\u1edbp 2 m\u00e0 em b\u00e9 s\u1ebd h\u1ecdc. N\u00f3 tr\u00f4ng gi\u1ed1ng nh\u01b0 m\u1ed9t h\u00ecnh th\u1ee9c to\u00e1n h\u1ecdc kh\u00e1 d\u1ec5 d\u00e0ng, nh\u01b0ng nhi\u1ec1u tr\u1ebb em khi gi\u1ea3i quy\u1ebft c\u00e1c v\u1ea5n \u0111\u1ec1 to\u00e1n h\u1ecdc l\u00e0 sai. V\u00ec v\u1eady, \u0111\u1ec3 gi\u00fap con b\u1ea1n hi\u1ec3u \u0111\u01b0\u1ee3c g\u1ed1c r\u1ec5 c\u1ee7a v\u1ea5n \u0111\u1ec1 v\u00e0 suy ngh\u0129 ch\u00ednh x\u00e1c h\u01a1n, cha m\u1eb9 kh\u00f4ng b\u1ecf qua nh\u1eefng b\u00ed m\u1eadt m\u00e0 kh\u1ec9 chia s\u1ebb trong th\u1eddi gian ng\u1eafn.<\/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=\"Kho_khan_khi_tre_hoc_toan_trong_vong_20_de_nho\"><\/span>Kh\u00f3 kh\u0103n khi tr\u1ebb h\u1ecdc to\u00e1n trong v\u00f2ng 20 \u0111\u1ec3 nh\u1edb<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p dir=\"ltr\">\u0110\u1ec3 bi\u1ebft ki\u1ebfn \u200b\u200bth\u1ee9c v\u1ec1 to\u00e1n h\u1ecdc to\u00e1n h\u1ecdc l\u1edbp 2, h\u1ecd s\u1ebd c\u00f3 th\u1ec3 l\u00e0m b\u00e0i t\u1eadp v\u1ec1 nh\u00e0 trong v\u00f2ng 20. Tuy nhi\u00ean, trong qu\u00e1 tr\u00ecnh gi\u1ea3i quy\u1ebft b\u00e0i t\u1eadp, h\u1ecd c\u00f3 nhi\u1ec1u kh\u1ea3 n\u0103ng<\/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\/bang-tru-co-nho-pham-vi-20-1.jpg\" alt=\"Nhi\u1ec1u em b\u00e9 kh\u00f4ng th\u1ef1c s\u1ef1 hi\u1ec3u ch\u00fang l\u00e0 g\u00ec \u0111\u1ec3 nh\u1edb gi\u1ea3i quy\u1ebft c\u00e1c b\u00e0i t\u1eadp. (\u1ea2nh: B\u1ed9 s\u01b0u t\u1eadp Internet)\" width=\"100%\"><\/p>\n<ul>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">Kh\u00f4ng hi\u1ec3u m\u1ed9t k\u1ef7 ni\u1ec7m l\u00e0 g\u00ec: nhi\u1ec1u tr\u1ebb em khi gi\u1ea3i quy\u1ebft c\u00e1c ph\u00e9p tr\u1eeb to\u00e1n, kh\u00f4ng th\u1ef1c s\u1ef1 hi\u1ec3u quy t\u1eafc khi th\u1ef1c hi\u1ec7n ngo\u1ea1i tr\u1eeb b\u1ed9 nh\u1edb, khi s\u1ed1 l\u01b0\u1ee3ng c\u00e1c kho\u1ea3n kh\u1ea5u tr\u1eeb nh\u1ecf h\u01a1n s\u1ed1 l\u1ea7n tr\u1eeb, l\u00e0m th\u1ebf n\u00e0o n\u00f3 kh\u00f4ng \u0111\u01b0\u1ee3c t\u00ednh? Ho\u1eb7c th\u1eadm ch\u00ed qu\u00ean &#8220;Miss 1&#8221; cho thu\u1eadt ng\u1eef \u1edf ph\u00eda tr\u01b0\u1edbc s\u1ebd d\u1eabn \u0111\u1ebfn k\u1ebft qu\u1ea3 sai.<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">Nhi\u1ec1u lo\u1ea1i b\u00e0i t\u1eadp: Trong ki\u1ebfn \u200b\u200bth\u1ee9c lo\u1ea1i b\u1ecf, c\u00f3 nhi\u1ec1u lo\u1ea1i b\u00e0i t\u1eadp kh\u00e1c nhau, v\u00ec v\u1eady nhi\u1ec1u tr\u1ebb em c\u1ea3m th\u1ea5y b\u1ed1i r\u1ed1i, kh\u00f3 n\u1eafm b\u1eaft gi\u1ea3i ph\u00e1p chi ti\u1ebft c\u1ee7a t\u1ea5t c\u1ea3 c\u00e1c b\u00e0i t\u1eadp.<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">Kh\u1ea3 n\u0103ng suy ngh\u0129 h\u1ea1n ch\u1ebf: \u0110\u1ed1i v\u1edbi to\u00e1n h\u1ecdc b\u1ed9 nh\u1edb c\u0169ng thu\u1ed9c v\u1ec1 h\u00ecnh th\u1ee9c suy ngh\u0129, \u0111\u00f2i h\u1ecfi tr\u1ebb ph\u1ea3i l\u00fd lu\u1eadn \u0111\u1ec3 t\u00ecm c\u00e2u tr\u1ea3 l\u1eddi ch\u00ednh x\u00e1c. Nh\u01b0ng kh\u00f4ng ph\u1ea3i t\u1ea5t c\u1ea3 tr\u1ebb em \u0111\u1ec1u c\u00f3 kh\u1ea3 n\u0103ng suy ngh\u0129 gi\u1ed1ng nhau, \u0111\u1eb7c bi\u1ec7t l\u00e0 c\u00e1c lo\u1ea1i quy t\u1eafc t\u00ecm ki\u1ebfm to\u00e1n h\u1ecdc s\u1ebd kh\u00f3 kh\u0103n cho tr\u1ebb em.<\/p>\n<\/li>\n<\/ul>\n<h2 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Bang_tru_duoc_ghi_nho_trong_vong_20_chi_tiet\"><\/span>B\u1ea3ng tr\u1eeb \u0111\u01b0\u1ee3c ghi nh\u1edb trong v\u00f2ng 20 chi ti\u1ebft<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p dir=\"ltr\">D\u01b0\u1edbi \u0111\u00e2y l\u00e0 m\u1ed9t b\u1ea3n t\u00f3m t\u1eaft v\u1ec1 ph\u00e9p tr\u1eeb b\u1ed9 nh\u1edb trong v\u00f2ng 20 \u0111\u1ec3 b\u1ea1n tham kh\u1ea3o:<\/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\/bang-tru-co-nho-pham-vi-20-2.jpg\" alt=\"B\u1ea3ng t\u00ednh to\u00e1n t\u1eeb t\u00ednh c\u00f3 b\u1ed9 nh\u1edb, ph\u1ea1m vi 20 cho tr\u1ebb em hi\u1ec3u. (\u1ea2nh: B\u1ed9 s\u01b0u t\u1eadp Internet) \" width=\"100%\"><\/p>\n<h2 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Bi_quyet_de_giup_tre_hoc_ve_diem_tru_va_ghi_nho_trong_vong_20_hieu_qua\"><\/span>B\u00ed quy\u1ebft \u0111\u1ec3 gi\u00fap tr\u1ebb h\u1ecdc v\u1ec1 \u0111i\u1ec3m tr\u1eeb v\u00e0 ghi nh\u1edb trong v\u00f2ng 20 hi\u1ec7u qu\u1ea3<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p dir=\"ltr\">\u0110\u1ed1i v\u1edbi ki\u1ebfn \u200b\u200bth\u1ee9c to\u00e1n h\u1ecdc ngo\u1ea1i tr\u1eeb vi\u1ec7c ghi nh\u1edb ph\u1ea1m vi 20 c\u0169ng l\u00e0 c\u01a1 b\u1ea3n, nh\u01b0ng \u0111\u1ec3 gi\u00fap tr\u1ebb em n\u1eafm b\u1eaft, hi\u1ec3u v\u00e0 th\u1ef1c h\u00e0nh ch\u00ednh x\u00e1c h\u01a1n, cha m\u1eb9 c\u00f3 th\u1ec3 ngay l\u1eadp t\u1ee9c \u0111\u1ec1 c\u1eadp \u0111\u1ebfn c\u00e1c m\u1eb9o sau:<\/p>\n<h3 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Xay_dung_mot_nen_tang_toan_hoc_cho_tre_em_voi_toan_hoc_khi\"><\/span>X\u00e2y d\u1ef1ng m\u1ed9t n\u1ec1n t\u1ea3ng to\u00e1n h\u1ecdc cho tr\u1ebb em v\u1edbi to\u00e1n h\u1ecdc kh\u1ec9<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p dir=\"ltr\">N\u1ebfu b\u1ea1n mu\u1ed1n con b\u1ea1n h\u1ecdc to\u00e1n, th\u1eadt d\u1ec5 d\u00e0ng \u0111\u1ec3 c\u00f3 \u0111\u01b0\u1ee3c ki\u1ebfn \u200b\u200bth\u1ee9c, n\u00f3 \u0111\u00f2i h\u1ecfi cha m\u1eb9 ph\u1ea3i t\u1ea1o ra s\u1ef1 ph\u1ea5n kh\u00edch cho tr\u1ebb khi h\u1ecdc, c\u0169ng nh\u01b0 c\u00f3 ni\u1ec1m \u0111am m\u00ea v\u1edbi m\u00f4n h\u1ecdc n\u00e0y t\u1eeb khi c\u00f2n nh\u1ecf. Nh\u01b0ng c\u00f3 l\u1ebd \u0111i\u1ec1u n\u00e0y v\u1edbi nhi\u1ec1u ph\u1ee5 huynh kh\u00e1 kh\u00f3 kh\u0103n v\u00ec th\u1eddi gian h\u1ea1n ch\u1ebf, b\u1eadn r\u1ed9n v\u1edbi c\u00f4ng vi\u1ec7c.<\/p>\n<p dir=\"ltr\">Do \u0111\u00f3, ph\u1ee5 huynh c\u00f3 th\u1ec3 ngay l\u1eadp t\u1ee9c \u0111\u1ec1 c\u1eadp \u0111\u1ebfn n\u1ec1n t\u1ea3ng c\u1ee7a vi\u1ec7c d\u1ea1y to\u00e1n tr\u1ef1c tuy\u1ebfn cho tr\u1ebb m\u1eabu gi\u00e1o v\u00e0 tr\u01b0\u1eddng ti\u1ec3u h\u1ecdc Shining Home &#8211; Gia \u0111\u00ecnh Anh Ng\u1eef Math. \u0110\u00e2y l\u00e0 \u1ee9ng d\u1ee5ng m\u00e0 kh\u1ec9 ph\u00e1t tri\u1ec3n nh\u1eb1m ph\u00e1t tri\u1ec3n 5 n\u0103ng l\u1ef1c to\u00e1n h\u1ecdc theo ch\u01b0\u01a1ng tr\u00ecnh GDPT m\u1edbi v\u00e0 h\u00ecnh th\u00e0nh th\u00f3i quen t\u01b0 duy logic t\u1eeb khi c\u00f2n nh\u1ecf, t\u1ea1o ra ni\u1ec1m \u0111am m\u00ea v\u00e0 y\u00eau th\u00edch m\u00f4n h\u1ecdc n\u00e0y nhi\u1ec1u h\u01a1n th\u00f4ng qua c\u00e1c ph\u01b0\u01a1ng ph\u00e1p gi\u1ea3ng d\u1ea1y t\u00edch c\u1ef1c.<\/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\/bang-tru-co-nho-pham-vi-20-3.jpg\" alt=\"H\u1ecdc to\u00e1n theo nhi\u1ec1u ph\u01b0\u01a1ng ph\u00e1p t\u00edch c\u1ef1c v\u1edbi to\u00e1n h\u1ecdc kh\u1ec9. (\u1ea2nh: Kh\u1ec9)\" width=\"100%\"><\/p>\n<p dir=\"ltr\">Th\u00f4ng th\u01b0\u1eddng, 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 d\u1ea1y d\u01b0\u1edbi d\u1ea1ng video v\u00e0 h\u00ecnh \u1ea3nh \u0111\u1ed9ng h\u00e0i h\u01b0\u1edbc. \u0110i\u1ec1u n\u00e0y s\u1ebd gi\u00fap tr\u1ebb d\u1ec5 d\u00e0ng c\u00f3 \u0111\u01b0\u1ee3c ki\u1ebfn \u200b\u200bth\u1ee9c v\u00e0 ghi nh\u1edb ch\u00fang s\u00e2u s\u1eafc h\u01a1n l\u00e0 ch\u1ec9 h\u1ecdc tr\u00ean s\u00e1ch, c\u0169ng nh\u01b0 khi h\u1ecdc t\u1eadp s\u1ebd quan t\u00e2m h\u01a1n.<\/p>\n<p dir=\"ltr\">\u0110\u1ed3ng th\u1eddi, khi h\u1ecdc to\u00e1n t\u1ea1i Shining Home &#8211; Gia \u0111\u00ecnh Anh Ng\u1eef Math, anh c\u0169ng \u0111\u00e3 tr\u1ea3i nghi\u1ec7m h\u01a1n 10.000 ho\u1ea1t \u0111\u1ed9ng t\u01b0\u01a1ng t\u00e1c li\u00ean quan \u0111\u1ebfn to\u00e1n h\u1ecdc, \u0111\u1ec3 anh c\u00f3 th\u1ec3 d\u1ef1a v\u00e0o ki\u1ebfn \u200b\u200bth\u1ee9c m\u00e0 anh \u0111\u00e3 h\u1ecdc \u0111\u01b0\u1ee3c \u0111\u1ec3 tham gia v\u00e0o c\u00e1c tr\u00f2 ch\u01a1i, gi\u1ea3i quy\u1ebft c\u00e1c c\u00e2u \u0111\u1ed1, &#8230; \u0111i\u1ec1u n\u00e0y s\u1ebd g\u00f3p ph\u1ea7n gi\u00fap anh quan t\u00e2m \u0111\u1ebfn vi\u1ec7c h\u1ecdc to\u00e1n h\u01a1n, c\u0169ng nh\u01b0 k\u00edch th\u00edch s\u1ef1 ph\u00e1t tri\u1ec3n c\u1ee7a tr\u1ebb em.<\/p>\n<p dir=\"ltr\">\u0110\u1ea3m b\u1ea3o r\u1eb1ng m\u1ed7i kho\u1ea3nh kh\u1eafc h\u1ecdc to\u00e1n v\u1edbi tr\u1ebb em c\u00f3 to\u00e1n h\u1ecdc l\u00e0 ni\u1ec1m vui cho ph\u1ee5 huynh \u0111\u01b0\u1ee3c \u0111\u1ea3m b\u1ea3o cho tr\u1ebb em \u0111\u1ebfn tr\u01b0\u1eddng, \u0111\u1ec3 gi\u00fap x\u00e2y d\u1ef1ng c\u00e1c n\u1ec1n t\u1ea3ng to\u00e1n h\u1ecdc v\u00e0 h\u1ed7 tr\u1ee3 c\u00e1c l\u1edbp h\u1ecdc hi\u1ec7u qu\u1ea3 trong l\u1edbp.<\/p>\n<p dir=\"ltr\">Ph\u1ee5 huynh \u0111\u1ec1 c\u1eadp \u0111\u1ebfn Shining Home &#8211; Gia \u0111\u00ecnh Anh Ng\u1eef Math th\u00f4ng qua video sau:<\/p>\n<p dir=\"ltr\" style=\"text-align: center\"><a href=\"https:\/\/www.youtube.com\/watch?v=7DSJPVHFROS\" target=\"_blank\" rel=\"noopener\">https:\/\/www.youtube.com\/watch?v=7DSJPVHFROS<\/a><\/p>\n<p dir=\"ltr\" style=\"text-align: left\">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\" style=\"text-align: left\">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_tre_hieu_luat_thuc_thi_ngoai_tru_hay_nho_pham_vi_20\"><\/span>Gi\u00fap tr\u1ebb hi\u1ec3u lu\u1eadt th\u1ef1c thi ngo\u1ea1i tr\u1eeb, h\u00e3y nh\u1edb ph\u1ea1m vi 20<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p dir=\"ltr\">\u0110i\u1ec1u \u0111\u1ea7u ti\u00ean \u0111\u1ec3 d\u1ea1y con b\u1ea1n l\u00e0 gi\u00fap n\u00f3 hi\u1ec3u nh\u1eefng g\u00ec ngo\u1ea1i tr\u1eeb tr\u00ed nh\u1edb. B\u1edfi v\u00ec nhi\u1ec1u tr\u1ebb em khi h\u1ecdc th\u01b0\u1eddng kh\u00f4ng ch\u00fa \u00fd, s\u1ebd r\u1ea5t kh\u00f3 \u0111\u1ec3 hi\u1ec3u quy t\u1eafc n\u00e0y. C\u1ee5 th\u1ec3, <em>Khi th\u1ef1c hi\u1ec7n ph\u00e9p tr\u1eeb, h\u00e3y nh\u1edb theo th\u1ee9 t\u1ef1 t\u1eeb ph\u1ea3i sang tr\u00e1i, nh\u01b0ng trong c\u00f9ng m\u1ed9t h\u00e0ng c\u00e1c kho\u1ea3n kh\u1ea5u tr\u1eeb nh\u1ecf h\u01a1n s\u1ed1 ngo\u1ea1i tr\u1eeb ch\u00fang ta s\u1ebd ph\u1ea3i m\u01b0\u1ee3n 1 trong h\u00e0ng ti\u1ebfp theo \u0111\u1ec3 tr\u1eeb (h\u00e3y nh\u1edb 1). Cho \u0111\u1ebfn khi th\u1ef1c hi\u1ec7n ph\u00e9p tr\u1eeb trong h\u00e0ng ti\u1ebfp theo, ch\u00fang t\u00f4i th\u00eam 1 trong ph\u1ea7n tr\u1eeb \u0111\u1ec3 t\u00ednh to\u00e1n.<\/em><\/p>\n<p dir=\"ltr\">Do \u0111\u00f3, ph\u1ee5 huynh n\u00ean l\u1ea5y c\u00e1c v\u00ed d\u1ee5 chi ti\u1ebft v\u00e0 sau \u0111\u00f3 ti\u1ebfn h\u00e0nh chi ti\u1ebft v\u1ec1 c\u00e1c chi ti\u1ebft t\u1eebng b\u01b0\u1edbc, gi\u1ea3i th\u00edch l\u00fd do t\u1ea1i sao c\u1ea7n ph\u1ea3i m\u01b0\u1ee3n 1 v\u00e0 tr\u1ea3 1 trong vi\u1ec7c t\u00ednh to\u00e1n b\u1ed9 nh\u1edb tr\u1eeb. \u0110i\u1ec1u n\u00e0y l\u00e0m cho tr\u1ebb em d\u1ec5 d\u00e0ng n\u1eafm b\u1eaft ki\u1ebfn \u200b\u200bth\u1ee9c h\u01a1n. Sau \u0111\u00f3, n\u00ean c\u1ed1 g\u1eafng gi\u1ea3i quy\u1ebft c\u00e1c b\u00e0i t\u1eadp \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o con b\u1ea1n hi\u1ec3u lu\u1eadt th\u1ef1c hi\u1ec7n t\u00ednh to\u00e1n n\u00e0y.<\/p>\n<h3 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Hay_de_tre_hoc_cach_loai_tru_toan_tu_co_ban_den_nang_cao\"><\/span>H\u00e3y \u0111\u1ec3 tr\u1ebb h\u1ecdc c\u00e1ch lo\u1ea1i tr\u1eeb to\u00e1n t\u1eeb c\u01a1 b\u1ea3n \u0111\u1ebfn n\u00e2ng cao<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p dir=\"ltr\">V\u1edbi ki\u1ebfn \u200b\u200bth\u1ee9c v\u1ec1 c\u00e1c kho\u1ea3n kh\u1ea5u tr\u1eeb, s\u1ebd kh\u00f3 nh\u1edb h\u01a1n khi kh\u00f4ng nh\u1edb r\u1eb1ng tr\u1ebb em \u0111ang h\u1ecdc l\u1edbp 1. Do \u0111\u00f3, ph\u1ee5 huynh n\u00ean d\u1ea1y ch\u00fang t\u1eeb nh\u1eefng ki\u1ebfn \u200b\u200bth\u1ee9c c\u01a1 b\u1ea3n nh\u1ea5t tr\u01b0\u1edbc khi ch\u00fang \u0111\u1ebfn \u0111\u1ec3 c\u1ea3i thi\u1ec7n, \u0111\u1ec3 tr\u00e1nh v\u01b0\u1ee3t qu\u00e1 kh\u1ea3 n\u0103ng h\u1ecdc t\u1eadp c\u1ee7a ch\u00fang.<\/p>\n<p dir=\"ltr\">\u1ede \u0111\u00e2y, l\u00fac \u0111\u1ea7u, cha m\u1eb9 c\u00f3 th\u1ec3 \u0111\u1ec3 con c\u00e1i h\u1ecd th\u1ef1c hi\u1ec7n 2 b\u00e0i t\u1eadp chuy\u00ean d\u1ee5ng v\u1edbi 1 -digit -memory -memo trong v\u00f2ng 20, sau khi \u0111\u1ee9a tr\u1ebb \u0111\u00e3 th\u00e0nh th\u1ea1o \u0111\u1ec3 c\u1ea3i thi\u1ec7n 2 s\u1ed1 v\u1edbi 2 s\u1ed1. C\u0169ng nh\u01b0 l\u00fac \u0111\u1ea7u, tr\u1ebb em n\u00ean t\u1ea1o ra c\u00e1c h\u00ecnh th\u1ee9c to\u00e1n h\u1ecdc c\u1ee7a t\u00e2m l\u00fd, \u0111\u1ecba \u0111i\u1ec3m v\u00e0 t\u00ednh to\u00e1n c\u00e1c h\u00ecnh th\u1ee9c to\u00e1n h\u1ecdc ti\u00ean ti\u1ebfn m\u1edbi nh\u01b0 t\u00ecm ki\u1ebfm c\u00e1c quy t\u1eafc, gi\u1ea3i quy\u1ebft to\u00e1n h\u1ecdc b\u1eb1ng c\u00e1c t\u1eeb.<\/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\/bang-tru-co-nho-pham-vi-20-4.jpg\" alt=\"N\u00ean th\u1ef1c h\u00e0nh gi\u1ea3i quy\u1ebft c\u00e1c b\u00e0i t\u1eadp t\u1eeb c\u01a1 b\u1ea3n \u0111\u1ebfn n\u00e2ng cao. (\u1ea2nh: B\u1ed9 s\u01b0u t\u1eadp Internet)\" width=\"100%\"><\/p>\n<h3 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Thuc_hanh_voi_tre_em_thuc_hanh_nhieu_hon\"><\/span>Th\u1ef1c h\u00e0nh v\u1edbi tr\u1ebb em, th\u1ef1c h\u00e0nh nhi\u1ec1u h\u01a1n<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p dir=\"ltr\">Thay v\u00ec h\u1ecdc t\u1eadp tr\u00ean s\u00e1ch, l\u00fd thuy\u1ebft s\u1ebd nhanh ch\u00f3ng qu\u00ean ki\u1ebfn \u200b\u200bth\u1ee9c. Do \u0111\u00f3, cha m\u1eb9 n\u00ean cho ph\u00e9p tr\u1ebb th\u1ef1c h\u00e0nh, th\u1ef1c h\u00e0nh ki\u1ebfn \u200b\u200bth\u1ee9c tr\u00ed nh\u1edb trong v\u00f2ng 20, t\u1eeb vi\u1ec7c th\u1ef1c hi\u1ec7n c\u00e1c b\u00e0i t\u1eadp trong s\u00e1ch gi\u00e1o khoa, h\u1ecdc ki\u1ebfn \u200b\u200bth\u1ee9c m\u1edbi tr\u00ean internet, cha m\u1eb9 t\u1ed5 ch\u1ee9c c\u00e1c v\u1ea5n \u0111\u1ec1 to\u00e1n h\u1ecdc, cho tr\u1ebb h\u1ecdc v\u1edbi b\u1ea1n b\u00e8, &#8230; \u0111i\u1ec1u n\u00e0y s\u1ebd gi\u00fap tr\u1ebb quan t\u00e2m h\u01a1n, k\u00edch th\u00edch t\u01b0 duy to\u00e1n h\u1ecdc v\u00e0 ghi nh\u1edb t\u1ed1t h\u01a1n.<\/p>\n<p dir=\"ltr\">\n<h2 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Cac_loai_bai_tap_loai_tru_trong_vong_20_co_bo_nho_chung\"><\/span>C\u00e1c lo\u1ea1i b\u00e0i t\u1eadp lo\u1ea1i tr\u1eeb trong v\u00f2ng 20 c\u00f3 b\u1ed9 nh\u1edb chung<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p dir=\"ltr\">\u0110\u1ed1i v\u1edbi ki\u1ebfn \u200b\u200bth\u1ee9c v\u1ec1 t\u00ednh to\u00e1n ngo\u1ea1i tr\u1eeb b\u1ed9 nh\u1edb c\u1ee7a L\u1edbp 2 trong ph\u1ea1m vi 20, tr\u1ebb em th\u01b0\u1eddng s\u1ebd g\u1eb7p c\u00e1c lo\u1ea1i b\u00e0i t\u1eadp c\u01a1 b\u1ea3n 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\/bang-tru-co-nho-pham-vi-20-5.jpg\" alt=\"C\u00f3 nhi\u1ec1u lo\u1ea1i b\u00e0i t\u1eadp v\u1ec1 tr\u00ed nh\u1edb ngo\u1ea1i tr\u1eeb em b\u00e9 c\u1ee7a b\u1ea1n \u0111\u1ec3 th\u1ef1c h\u00e0nh. (\u1ea2nh: B\u1ed9 s\u01b0u t\u1eadp Internet)\" width=\"100%\"><\/p>\n<h3 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Mau_1_Tinh_toan\"><\/span>M\u1eabu 1: T\u00ednh to\u00e1n<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p dir=\"ltr\">Gi\u1ea3i ph\u00e1p: H\u1ecd s\u1ebd th\u1ef1c hi\u1ec7n t\u00ednh to\u00e1n ngo\u1ea1i tr\u1eeb r\u1eb1ng b\u1ed9 nh\u1edb d\u1ef1a tr\u00ean c\u00e1c quy t\u1eafc c\u1ee7a h\u1ecd ho\u1eb7c d\u1ef1a tr\u00ean c\u00e1c s\u1ed1 h\u1ed7 tr\u1ee3 (\u0111\u1ebfm) ho\u1eb7c ph\u00e2n t\u00e1ch c\u00e1c s\u1ed1.<\/p>\n<p dir=\"ltr\"><em>V\u00ed d\u1ee5: 12 &#8211; 7 = 5<\/em><\/p>\n<h3 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Mau_2_Van_de_co_tu\"><\/span>M\u1eabu 2: V\u1ea5n \u0111\u1ec1 c\u00f3 t\u1eeb<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p dir=\"ltr\">Ph\u01b0\u01a1ng ph\u00e1p gi\u1ea3i ph\u00e1p: H\u1ecd s\u1ebd ph\u1ea3i \u0111\u1ecdc v\u00e0 ph\u00e2n t\u00edch v\u1ea5n \u0111\u1ec1 m\u1ed9t c\u00e1ch c\u1ea9n th\u1eadn, x\u00e1c \u0111\u1ecbnh nh\u1eefng g\u00ec d\u1eef li\u1ec7u \u0111\u00e3 \u0111\u01b0\u1ee3c t\u00ednh to\u00e1n? T\u1eeb \u0111\u00f3, t\u00ecm m\u1ed9t gi\u1ea3i ph\u00e1p cho v\u1ea5n \u0111\u1ec1 v\u00e0 sau \u0111\u00f3 tr\u00ecnh b\u00e0y gi\u1ea3i ph\u00e1p v\u00e0 c\u00e2u tr\u1ea3 l\u1eddi chi ti\u1ebft.<\/p>\n<p dir=\"ltr\"><em>V\u00ed d\u1ee5: LAN v\u00e0 b\u1ea3o ch\u01a1i c\u1ea7n c\u1ea9u gi\u1ea5y, c\u1ea3 hai \u0111\u1ec1u s\u1eafp x\u1ebfp 15 \u0111\u1ee9a tr\u1ebb. \u0110\u1eb7c bi\u1ec7t LAN \u0111\u00e3 s\u1eafp x\u1ebfp 8 tr\u1ebb em. Y\u00eau c\u1ea7u s\u1eafp x\u1ebfp c\u1ea7n c\u1ea9u gi\u1ea5y?<\/em><\/p>\n<p dir=\"ltr\"><em>Ph\u1ea7n th\u01b0\u1edfng:<\/em><\/p>\n<p dir=\"ltr\"><em>S\u1ed1 l\u01b0\u1ee3ng c\u1ea7n c\u1ea9u gi\u1ea5y \u0111\u01b0\u1ee3c s\u1eafp x\u1ebfp:<\/em><\/p>\n<p dir=\"ltr\"><em>15 &#8211; 8 = 7 (tr\u1ebb em)<\/em><\/p>\n<p dir=\"ltr\"><em>Tr\u1ea3 l\u1eddi: 7 c\u1ea7n c\u1ea9u gi\u1ea5y.<\/em><\/p>\n<h3 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Mau_3_Tim_so_con_thieu_trong_phep_tru_dua_tren_diem_tru\"><\/span>M\u1eabu 3: T\u00ecm s\u1ed1 c\u00f2n thi\u1ebfu trong ph\u00e9p tr\u1eeb d\u1ef1a tr\u00ean \u0111i\u1ec3m tr\u1eeb<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p dir=\"ltr\">Gi\u1ea3i ph\u00e1p: Ch\u00fang t\u00f4i s\u1ebd xem x\u00e9t c\u00e1c t\u00ednh to\u00e1n ngo\u1ea1i tr\u1eeb trong v\u00f2ng 20 trong b\u1ea3ng tr\u1eeb. Ho\u1eb7c c\u1ea7n suy lu\u1eadn \u0111\u1ec3 t\u00ecm \u0111\u00fang con s\u1ed1 v\u00e0 \u0111i\u1ec1n v\u00e0o d\u1ea5u ch\u1ea5m<\/p>\n<p dir=\"ltr\"><em>V\u00ed d\u1ee5: \u0110i\u1ec1n v\u00e0o s\u1ed1 th\u00edch h\u1ee3p trong d\u1ea5u ch\u1ea5m<\/em><\/p>\n<p dir=\"ltr\"><em>18 &#8211; 9 = &#8230;<\/em><\/p>\n<p dir=\"ltr\"><em>12 &#8211; &#8230; = 4<\/em><\/p>\n<p dir=\"ltr\"><em>&#8230; &#8211; 8 = 9<\/em><\/p>\n<p dir=\"ltr\"><em>Ph\u1ea7n th\u01b0\u1edfng:<\/em><\/p>\n<p dir=\"ltr\"><em>18 &#8211; 9 = 7<\/em><\/p>\n<p dir=\"ltr\"><em>12 &#8211; 8 = 4<\/em><\/p>\n<p dir=\"ltr\"><em>17 &#8211; 8 = 9<\/em><\/p>\n<h3 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Mau_4_Tinh_gia_tri_cua_bieu_thuc\"><\/span>M\u1eabu 4: T\u00ednh gi\u00e1 tr\u1ecb c\u1ee7a bi\u1ec3u th\u1ee9c<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p dir=\"ltr\">Ph\u01b0\u01a1ng ph\u00e1p gi\u1ea3i ph\u00e1p: Th\u1ef1c hi\u1ec7n gi\u1ea3i th\u01b0\u1edfng t\u00ednh to\u00e1n theo th\u1ee9 t\u1ef1 t\u1eeb tr\u00e1i sang ph\u1ea3i \u0111\u1ec3 t\u00ecm c\u00e2u tr\u1ea3 l\u1eddi \u0111\u00fang.<\/p>\n<p dir=\"ltr\"><em>V\u00ed d\u1ee5: T\u00ednh to\u00e1n: 16 &#8211; 9 + 3<\/em><\/p>\n<p dir=\"ltr\"><em>Gi\u1ea3i th\u01b0\u1edfng: 16 &#8211; 9 + 3 = 10.<\/em><\/p>\n<h3 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Mau_5_So_sanh\"><\/span>M\u1eabu 5: So s\u00e1nh<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p dir=\"ltr\">Gi\u1ea3i ph\u00e1p: Ch\u00fang t\u00f4i s\u1ebd t\u00ednh to\u00e1n gi\u00e1 tr\u1ecb c\u1ee7a hai b\u00ean, sau \u0111\u00f3 ti\u1ebfn h\u00e0nh so s\u00e1nh k\u1ebft qu\u1ea3 v\u1edbi nhau v\u00e0 \u0111i\u1ec1n v\u00e0o con d\u1ea5u&gt;, &lt;, = ch\u00ednh x\u00e1c.<\/p>\n<p dir=\"ltr\"><em>V\u00ed d\u1ee5: Nh\u1eadp d\u1ea5u hi\u1ec7u = trong d\u1ea5u ch\u1ea5m<\/em><\/p>\n<p dir=\"ltr\"><em>13 &#8211; 9 &#8230; 5<\/em><\/p>\n<p dir=\"ltr\"><em>15 &#8211; 7 &#8230; 13 &#8211; 8<\/em><\/p>\n<p dir=\"ltr\"><em>17 &#8211; 8 &#8230; 9<\/em><\/p>\n<p dir=\"ltr\"><em>Ph\u1ea7n th\u01b0\u1edfng:<\/em><\/p>\n<p dir=\"ltr\"><em>13 &#8211; 9 &lt;5<\/em><\/p>\n<p dir=\"ltr\"><em>15 &#8211; 7&gt; 13 &#8211; 8<\/em><\/p>\n<p dir=\"ltr\"><em>17 &#8211; 8 = 9<\/em><\/p>\n<h2 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Mot_so_bai_tap_tap_the_duc_voi_tri_nho_trong_vong_20_de_em_be_se_thuc_hanh\"><\/span>M\u1ed9t s\u1ed1 b\u00e0i t\u1eadp t\u1eadp th\u1ec3 d\u1ee5c v\u1edbi tr\u00ed nh\u1edb trong v\u00f2ng 20 \u0111\u1ec3 em b\u00e9 s\u1ebd th\u1ef1c h\u00e0nh<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p dir=\"ltr\">D\u01b0\u1edbi \u0111\u00e2y l\u00e0 m\u1ed9t b\u1ea3n t\u00f3m t\u1eaft c\u1ee7a m\u1ed9t s\u1ed1 b\u00e0i t\u1eadp v\u1ec1 ph\u00e9p tr\u1eeb v\u1edbi b\u1ed9 nh\u1edb c\u1ee7a l\u1edbp 2, trong v\u00f2ng 20 \u0111\u1ec3 ch\u00fang c\u00f3 th\u1ec3 th\u1ef1c h\u00e0nh hi\u1ec7u qu\u1ea3:<\/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\/bang-tru-co-nho-pham-vi-20-6.jpg\" alt=\"(Ngu\u1ed3n: T\u00f3m t\u1eaft)\" width=\"100%\"><\/p>\n<h2 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Mot_so_ghi_chu_Khi_cha_me_day_con_hoc_toan\"><\/span>M\u1ed9t s\u1ed1 ghi ch\u00fa Khi cha m\u1eb9 d\u1ea1y con h\u1ecdc to\u00e1n<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p dir=\"ltr\">\u0110\u1ec3 c\u1ea3i thi\u1ec7n hi\u1ec7u qu\u1ea3 c\u1ee7a to\u00e1n h\u1ecdc n\u00f3i chung, t\u00ednh to\u00e1n b\u1ed9 nh\u1edb n\u00f3i ri\u00eang, ph\u1ee5 huynh c\u1ea7n l\u01b0u \u00fd m\u1ed9t s\u1ed1 v\u1ea5n \u0111\u1ec1 sau:<\/p>\n<ul>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">Cha m\u1eb9 lu\u00f4n \u0111i c\u00f9ng \u0111\u1ec3 h\u1ed7 tr\u1ee3 tr\u1ebb h\u1ecdc, tr\u1ea3 l\u1eddi nh\u1eefng kh\u00f3 kh\u0103n cho tr\u1ebb em.<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">N\u00ean t\u1ea1o th\u00f3i quen t\u1ef1 h\u1ecdc cho tr\u1ebb em khi kh\u00f4ng c\u00f3 cha m\u1eb9 c\u00f3 c\u1eb7p<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">Kh\u00f4ng g\u00e2y \u00e1p l\u1ef1c cho tr\u1ebb nh\u01b0 h\u1ecdc nhi\u1ec1u, \u00e1p \u0111\u1eb7t \u0111i\u1ec3m s\u1ed1 &#8230;<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">\u0110\u1eebng gi\u1ea3i quy\u1ebft b\u00e0i t\u1eadp v\u1ec1 nh\u00e0 c\u1ee7a con b\u1ea1n, n\u00ean y\u00eau c\u1ea7u em b\u00e9 t\u00ecm gi\u1ea3i ph\u00e1p tr\u01b0\u1edbc khi h\u1ecfi cha m\u1eb9<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">Th\u01b0\u1eddng xuy\u00ean ki\u1ec3m tra c\u00e1c b\u00e0i t\u1eadp to\u00e1n c\u1ee7a tr\u1ebb \u0111\u1ec3 xem kh\u1ea3 n\u0103ng h\u1ecdc tr\u1ebb em nh\u01b0 th\u1ebf n\u00e0o<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">Ph\u01b0\u01a1ng ph\u00e1p \u0111a d\u1ea1ng \u0111\u1ec3 d\u1ea1y tr\u1ebb h\u1ecdc to\u00e1n \u0111\u1ec3 con c\u00e1i c\u00f3 th\u1ec3 h\u1ea5p th\u1ee5 v\u00e0 quan t\u00e2m h\u01a1n \u0111\u1ebfn vi\u1ec7c h\u1ecdc v\u1edbi cha m\u1eb9.<\/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 dir=\"ltr\" style=\"line-height: 1.7999999999999998;text-align: justify;margin-top: 12pt;margin-bottom: 12pt\">H\u00e3y nh\u1edb trong v\u00f2ng 20 l\u00e0 ki\u1ebfn \u200b\u200bth\u1ee9c c\u01a1 b\u1ea3n khi h\u1ecdc ph\u00e9p tr\u1eeb m\u00e0 h\u1ecd c\u1ea7n hi\u1ec3u ngay t\u1eeb \u0111\u1ea7u, b\u1edfi v\u00ec \u0111\u00e2y l\u00e0 m\u1ed9t n\u1ec1n t\u1ea3ng quan tr\u1ecdng \u0111\u1ec3 h\u1ecdc ki\u1ebfn \u200b\u200bth\u1ee9c to\u00e1n h\u1ecdc cao h\u01a1n. V\u00ec v\u1eady, cha m\u1eb9 c\u00f3 th\u1ec3 h\u1ed7 tr\u1ee3 con c\u00e1i h\u1ecd l\u00e0m ch\u1ee7 ki\u1ebfn \u200b\u200bth\u1ee9c n\u00e0y d\u1ef1a tr\u00ean vi\u1ec7c chia s\u1ebb v\u00e0 b\u00ed m\u1eadt m\u00e0 Shining Home &#8211; Gia \u0111\u00ecnh Anh Ng\u1eef cung c\u1ea5p \u1edf tr\u00ean.<\/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>Ngo\u1ea1i tr\u1eeb b\u1ed9 nh\u1edb trong v\u00f2ng 20 l\u00e0 ki\u1ebfn \u200b\u200bth\u1ee9c c\u01a1 b\u1ea3n c\u1ee7a to\u00e1n h\u1ecdc l\u1edbp 2 m\u00e0 em b\u00e9 s\u1ebd h\u1ecdc. N\u00f3 tr\u00f4ng gi\u1ed1ng nh\u01b0 m\u1ed9t h\u00ecnh th\u1ee9c to\u00e1n h\u1ecdc kh\u00e1 d\u1ec5 d\u00e0ng, nh\u01b0ng nhi\u1ec1u tr\u1ebb em khi gi\u1ea3i quy\u1ebft c\u00e1c v\u1ea5n \u0111\u1ec1 to\u00e1n h\u1ecdc l\u00e0 sai. V\u00ec v\u1eady, \u0111\u1ec3 gi\u00fap con b\u1ea1n hi\u1ec3u&#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-17255","post","type-post","status-publish","format-standard","hentry","category-kien-thuc"],"_links":{"self":[{"href":"https:\/\/www.ckconitsha.com\/vn\/wp-json\/wp\/v2\/posts\/17255","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=17255"}],"version-history":[{"count":2,"href":"https:\/\/www.ckconitsha.com\/vn\/wp-json\/wp\/v2\/posts\/17255\/revisions"}],"predecessor-version":[{"id":23340,"href":"https:\/\/www.ckconitsha.com\/vn\/wp-json\/wp\/v2\/posts\/17255\/revisions\/23340"}],"wp:attachment":[{"href":"https:\/\/www.ckconitsha.com\/vn\/wp-json\/wp\/v2\/media?parent=17255"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.ckconitsha.com\/vn\/wp-json\/wp\/v2\/categories?post=17255"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.ckconitsha.com\/vn\/wp-json\/wp\/v2\/tags?post=17255"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}