{"id":8628,"date":"2025-04-06T11:00:47","date_gmt":"2025-04-06T04:00:47","guid":{"rendered":"https:\/\/www.ckconitsha.com\/vn\/?p=8628"},"modified":"2025-06-29T12:00:04","modified_gmt":"2025-06-29T05:00:04","slug":"bang-don-vi-do-do-dai-lop-3-va-cach-hoc-hieu-qua","status":"publish","type":"post","link":"https:\/\/www.ckconitsha.com\/vn\/bang-don-vi-do-do-dai-lop-3-va-cach-hoc-hieu-qua\/","title":{"rendered":"B\u1ea3ng \u0111\u01a1n v\u1ecb \u0111o \u0111\u1ed9 d\u00e0i l\u1edbp 3 v\u00e0 c\u00e1ch h\u1ecdc 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\/bang-don-vi-do-do-dai-lop-3-va-cach-hoc-hieu-qua\/#Gioi_thieu_ve_bang_Don_vi_do_3_cua_nguoi_choi\" >Gi\u1edbi thi\u1ec7u v\u1ec1 b\u1ea3ng \u0110\u01a1n v\u1ecb \u0111o 3 c\u1ee7a ng\u01b0\u1eddi ch\u01a1i<\/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\/bang-don-vi-do-do-dai-lop-3-va-cach-hoc-hieu-qua\/#Cach_thay_doi_don_vi_do_do_dai_lop_3\" >C\u00e1ch thay \u0111\u1ed5i \u0111\u01a1n v\u1ecb \u0111o \u0111\u1ed9 d\u00e0i l\u1edbp 3<\/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\/bang-don-vi-do-do-dai-lop-3-va-cach-hoc-hieu-qua\/#Cac_hinh_thuc_toan_hoc_cua_cac_don_vi_do_luong_lop_3_chung\" >C\u00e1c h\u00ecnh th\u1ee9c to\u00e1n h\u1ecdc c\u1ee7a c\u00e1c \u0111\u01a1n v\u1ecb \u0111o l\u01b0\u1eddng l\u1edbp 3 chung<\/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\/bang-don-vi-do-do-dai-lop-3-va-cach-hoc-hieu-qua\/#Bieu_mau_toan_hoc_rut_sang_don_vi_lop_3_nang_cao\" >Bi\u1ec3u m\u1eabu to\u00e1n h\u1ecdc r\u00fat sang \u0111\u01a1n v\u1ecb l\u1edbp 3 n\u00e2ng cao<\/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\/bang-don-vi-do-do-dai-lop-3-va-cach-hoc-hieu-qua\/#Bai_toan_lop_3_thay_doi_don_vi_do_chieu_dai\" >B\u00e0i to\u00e1n l\u1edbp 3 thay \u0111\u1ed5i \u0111\u01a1n v\u1ecb \u0111o chi\u1ec1u d\u00e0i<\/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\/bang-don-vi-do-do-dai-lop-3-va-cach-hoc-hieu-qua\/#Mau_toan_so_sanh_tinh_toan_voi_don_vi_do_luong_toan_hoc_lop_3\" >M\u1eabu to\u00e1n so s\u00e1nh t\u00ednh to\u00e1n v\u1edbi \u0111\u01a1n v\u1ecb \u0111o l\u01b0\u1eddng to\u00e1n h\u1ecdc l\u1edbp 3<\/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\/bang-don-vi-do-do-dai-lop-3-va-cach-hoc-hieu-qua\/#Hinh_thuc_toan_hoc_cua_Do_don_vi_3_co_the_do_luong_do_dai_hinh_hoc\" >H\u00ecnh th\u1ee9c to\u00e1n h\u1ecdc c\u1ee7a \u0110o \u0111\u01a1n v\u1ecb 3 c\u00f3 th\u1ec3 \u0111o l\u01b0\u1eddng \u0111\u1ed9 d\u00e0i h\u00ecnh h\u1ecdc<\/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\/bang-don-vi-do-do-dai-lop-3-va-cach-hoc-hieu-qua\/#Van_de_tinh_toan_lop_3_ve_do_dai_cua_phep_do_chieu_dai\" >V\u1ea5n \u0111\u1ec1 t\u00ednh to\u00e1n l\u1edbp 3 v\u1ec1 \u0111\u1ed9 d\u00e0i c\u1ee7a ph\u00e9p \u0111o chi\u1ec1u d\u00e0i<\/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\/bang-don-vi-do-do-dai-lop-3-va-cach-hoc-hieu-qua\/#Cach_hoc_Toan_lop_3_trong_don_vi_Don_vi_do_luong_hieu_qua\" >C\u00e1ch h\u1ecdc To\u00e1n l\u1edbp 3 trong \u0111\u01a1n v\u1ecb \u0110\u01a1n v\u1ecb \u0111o l\u01b0\u1eddng 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-10\" href=\"https:\/\/www.ckconitsha.com\/vn\/bang-don-vi-do-do-dai-lop-3-va-cach-hoc-hieu-qua\/#Nghien_cuu_ve_mat_toan_hoc_lop_3_don_vi_do_do_dai_truc_tuyen_hieu_qua_voi_toan_hoc_khi\" >Nghi\u00ean c\u1ee9u v\u1ec1 m\u1eb7t to\u00e1n h\u1ecdc l\u1edbp 3, \u0111\u01a1n v\u1ecb \u0111o \u0111\u1ed9 d\u00e0i tr\u1ef1c tuy\u1ebfn hi\u1ec7u qu\u1ea3 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-11\" href=\"https:\/\/www.ckconitsha.com\/vn\/bang-don-vi-do-do-dai-lop-3-va-cach-hoc-hieu-qua\/#Hay_chac_chan_rang_em_be_cua_ban_ghi_nho_bang_don_vi_lop_3\" >H\u00e3y ch\u1eafc ch\u1eafn r\u1eb1ng em b\u00e9 c\u1ee7a b\u1ea1n ghi nh\u1edb b\u1ea3ng \u0111\u01a1n v\u1ecb l\u1edbp 3<\/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\/bang-don-vi-do-do-dai-lop-3-va-cach-hoc-hieu-qua\/#Nghien_cuu_don_vi_toan_hoc_do_do_dai_toan_hoc_lop_3_bang_cach_lien_he_voi_thuc_te\" >Nghi\u00ean c\u1ee9u \u0111\u01a1n v\u1ecb to\u00e1n h\u1ecdc \u0111o \u0111\u1ed9 d\u00e0i to\u00e1n h\u1ecdc l\u1edbp 3 b\u1eb1ng c\u00e1ch li\u00ean h\u1ec7 v\u1edbi th\u1ef1c t\u1ebf<\/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\/bang-don-vi-do-do-dai-lop-3-va-cach-hoc-hieu-qua\/#Tham_gia_cung_em_be_cua_ban_de_choi_tro_choi_ve_viec_dem_va_so_sanh_do_dai\" >Tham gia c\u00f9ng em b\u00e9 c\u1ee7a b\u1ea1n \u0111\u1ec3 ch\u01a1i tr\u00f2 ch\u01a1i v\u1ec1 vi\u1ec7c \u0111\u1ebfm v\u00e0 so s\u00e1nh \u0111\u1ed9 d\u00e0i<\/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\/bang-don-vi-do-do-dai-lop-3-va-cach-hoc-hieu-qua\/#Ket_luan\" >K\u1ebft lu\u1eadn<\/a><\/li><\/ul><\/nav><\/div>\n<\/p>\n<p>Ki\u1ebfn th\u1ee9c v\u1ec1 b\u1ea3ng \u0110\u01a1n v\u1ecb \u0111o l\u01b0\u1eddng l\u1edbp 3 kh\u00f4ng qu\u00e1 kh\u00f3, nh\u01b0ng n\u00f3 l\u00e0m cho tr\u1ebb r\u1ea5t d\u1ec5 b\u1ecb nh\u1ea7m l\u1eabn, d\u1eabn \u0111\u1ebfn t\u00ednh to\u00e1n sai. Do \u0111\u00f3, \u0111\u1ec3 gi\u00fap con b\u1ea1n chinh ph\u1ee5c c\u00e1c b\u00e0i t\u1eadp c\u1ee7a h\u00ecnh th\u1ee9c n\u00e0y t\u1eeb c\u01a1 b\u1ea3n \u0111\u1ebfn c\u1ea3i thi\u1ec7n hi\u1ec7u qu\u1ea3, cha m\u1eb9, h\u00e3y \u0111\u1ec3 Kh\u1ec9 kh\u00e1m ph\u00e1 b\u00ed m\u1eadt h\u1ecdc t\u1eadp \u0111\u01b0\u1ee3c chia s\u1ebb trong b\u00e0i vi\u1ebft sau.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Gioi_thieu_ve_bang_Don_vi_do_3_cua_nguoi_choi\"><\/span>Gi\u1edbi thi\u1ec7u v\u1ec1 b\u1ea3ng \u0110\u01a1n v\u1ecb \u0111o 3 c\u1ee7a ng\u01b0\u1eddi ch\u01a1i<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Trong ch\u01b0\u01a1ng tr\u00ecnh to\u00e1n l\u1edbp 3, tr\u1ebb em s\u1ebd quen thu\u1ed9c v\u1edbi \u0111\u01a1n v\u1ecb \u0111o l\u01b0\u1eddng.<\/p>\n<p>Theo \u0111\u00f3, \u0111\u01a1n v\u1ecb t\u00ednh to\u00e1n \u0111\u1ed9 d\u00e0i c\u1ee7a s\u1ed1 l\u01b0\u1ee3ng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 \u0111o kho\u1ea3ng c\u00e1ch gi\u1eefa hai \u0111i\u1ec3m. N\u00f3 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng nh\u01b0 m\u1ed9t m\u1ed1c cho c\u01b0\u1eddng \u0111\u1ed9 cho t\u1ea5t c\u1ea3 c\u00e1c \u0111\u1ed9 d\u00e0i kh\u00e1c. V\u00ed d\u1ee5, <em>Kho\u1ea3ng c\u00e1ch t\u1eeb nh\u00e0 \u0111\u1ebfn tr\u01b0\u1eddng d\u00e0i 5 km, 5 l\u00e0 chi\u1ec1u d\u00e0i v\u00e0 km l\u00e0 \u0111\u01a1n v\u1ecb \u0111o chi\u1ec1u d\u00e0i t\u1eeb nh\u00e0 \u0111\u1ebfn tr\u01b0\u1eddng.<\/em><\/p>\n<p style=\"text-align: center\"><img loading=\"lazy\" decoding=\"async\" class=\"lazyload\" src=\"https:\/\/external-content.duckduckgo.com\/iu\/?u=https:\/\/vnmedia2.monkeyuni.net\/upload\/web\/img\/bang-don-vi-do-do-dai-lop-3-01.jpg\" alt=\"B\u1ea3ng \u0111o \u0111\u01a1n v\u1ecb c\u1ee7a l\u1edbp 3. (Ngu\u1ed3n h\u00ecnh \u1ea3nh: B\u1ed9 s\u01b0u t\u1eadp Internet)\" width=\"800\" height=\"497\"><\/p>\n<p>\u0110\u01a1n v\u1ecb \u0111o l\u01b0\u1eddng c\u1ee5 th\u1ec3 bao g\u1ed3m KM, HM, DAM, M, DM, CM v\u00e0 MM. \u0110\u01a1n v\u1ecb chuy\u1ec3n \u0111\u1ed5i th\u00f4ng tin nh\u01b0 sau:<\/p>\n<ul>\n<li>Km (km) 1km = 10hm = 1000m<\/li>\n<li>Hm (h\u00e9c-t\u00f4nt) 1hm = 10dam = 100m<\/li>\n<li>\u0110\u1eadp (de-ca-met) (1dam = 10m<\/li>\n<li>M (m\u00e9t) 1m = 10dm = 100cm = 1000mm<\/li>\n<li>DM (Ti\u00eau \u0111\u1ec1-XI-MET) 1DM = 10cm = 100mm<\/li>\n<li>Cm (Xen-ti-giu) 1cm = 10 mm<\/li>\n<li>Mm (mi-li-met) (vi\u1ebft t\u1eaft l\u00e0 mm)<\/li>\n<\/ul>\n<h2><span class=\"ez-toc-section\" id=\"Cach_thay_doi_don_vi_do_do_dai_lop_3\"><\/span>C\u00e1ch thay \u0111\u1ed5i \u0111\u01a1n v\u1ecb \u0111o \u0111\u1ed9 d\u00e0i l\u1edbp 3<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Hi\u1ec7n t\u1ea1i, nghi\u00ean c\u1ee9u c\u1ee7a \u0111\u01a1n v\u1ecb \u0111o \u0111\u1ed9 d\u00e0i kh\u00f4ng qu\u00e1 kh\u00f3. Tr\u1ebb em ch\u1ec9 c\u1ea7n ghi nh\u1edb c\u00e1c \u0111\u01a1n v\u1ecb theo th\u1ee9 t\u1ef1 sau \u0111\u1ec3 x\u00e1c \u0111\u1ecbnh \u0111\u1ed9 d\u00e0i c\u1ee7a chi\u1ec1u d\u00e0i: km&gt; hm&gt; dam&gt; m&gt; dm&gt; cm&gt; mm. <\/p>\n<p>C\u00e1ch \u0111\u1ec3 thay \u0111\u1ed5i \u0111\u1ed9 d\u00e0i c\u1ee7a chi\u1ec1u d\u00e0i c\u0169ng r\u1ea5t \u0111\u01a1n gi\u1ea3n. \u0110\u00f3 l\u00e0, ch\u00fang t\u00f4i tu\u00e2n theo quy t\u1eafc: m\u1ed7i \u0111\u01a1n v\u1ecb \u1edf ph\u00eda tr\u01b0\u1edbc s\u1ebd g\u1ea5p 10 l\u1ea7n \u0111\u01a1n v\u1ecb ngay sau khi n\u00f3 ho\u1eb7c m\u1ed7i \u0111\u01a1n v\u1ecb s\u1ebd b\u1eb1ng 1\/10 c\u1ee7a \u0111\u01a1n v\u1ecb ngay tr\u01b0\u1edbc khi n\u00f3.<\/p>\n<p style=\"text-align: center\"><img loading=\"lazy\" decoding=\"async\" class=\"lazyload\" src=\"https:\/\/external-content.duckduckgo.com\/iu\/?u=https:\/\/vnmedia2.monkeyuni.net\/upload\/web\/img\/bang-don-vi-do-do-dai-lop-3-02.jpg\" alt=\"Quy t\u1eafc trao \u0111\u1ed5i \u0111\u01a1n v\u1ecb c\u00f3 \u0111\u1ed9 d\u00e0i m\u1ed9t c\u00e1ch d\u1ec5 d\u00e0ng. (\u1ea2nh: B\u1ed9 s\u01b0u t\u1eadp Internet)\" width=\"800\" height=\"400\"><\/p>\n<p>V\u00e0 khi b\u1ea1n bi\u1ebft nguy\u00ean t\u1eafc n\u00e0y, m\u1ecdi ng\u01b0\u1eddi ch\u1ec9 c\u1ea7n di chuy\u1ec3n d\u1ea5u ph\u1ea9y sang tr\u00e1i ho\u1eb7c sang ph\u1ea3i c\u1ee7a m\u1ed7i \u0111\u01a1n v\u1ecb \u0111o l\u01b0\u1eddng ngay sau khi n\u00f3 m\u1ed9t ch\u1eef s\u1ed1 ho\u1eb7c th\u00eam s\u1ed1 0 cho m\u1ed7i \u0111\u01a1n v\u1ecb \u0111o \u0111\u1ec3 chuy\u1ec3n \u0111\u1ed5i th\u00e0nh c\u00f4ng.<\/p>\n<p>\u0110\u1eb7c bi\u1ec7t, trong tr\u01b0\u1eddng h\u1ee3p tr\u1ebb em kh\u00f4ng th\u00e0nh th\u1ea1o trong vi\u1ec7c thay \u0111\u1ed5i \u0111\u01a1n v\u1ecb \u0111o \u0111\u1ed9 d\u00e0i, ch\u00fang c\u00f3 th\u1ec3 thay \u0111\u1ed5i theo c\u00e1c \u0111\u01a1n v\u1ecb ngay sau khi n\u00f3 v\u00e0 cu\u1ed1i c\u00f9ng \u0111\u1ebfn \u0111\u01a1n v\u1ecb \u0111\u1ec3 thay \u0111\u1ed5i theo y\u00eau c\u1ea7u c\u1ee7a ch\u1ee7 \u0111\u1ec1. V\u00ed d\u1ee5: <em>50 km = 500hm = 5.000dam = 50.000 m.<\/em><\/p>\n<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Cac_hinh_thuc_toan_hoc_cua_cac_don_vi_do_luong_lop_3_chung\"><\/span>C\u00e1c h\u00ecnh th\u1ee9c to\u00e1n h\u1ecdc c\u1ee7a c\u00e1c \u0111\u01a1n v\u1ecb \u0111o l\u01b0\u1eddng l\u1edbp 3 chung<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>D\u01b0\u1edbi \u0111\u00e2y l\u00e0 m\u1ed9t s\u1ed1 lo\u1ea1i to\u00e1n h\u1ecdc tr\u00ean b\u1ea3ng \u0111\u01a1n v\u1ecb \u0111o l\u1edbp th\u1ee9 3 trong s\u00e1ch gi\u00e1o khoa, b\u00e0i t\u1eadp ho\u1eb7c c\u00e2u h\u1ecfi thi. Ph\u1ee5 huynh n\u00ean tham kh\u1ea3o \u00fd ki\u1ebfn \u200b\u200b\u0111\u1ec3 h\u01b0\u1edbng d\u1eabn con c\u00e1i h\u1ecd h\u1ecdc, ho\u1eb7c \u0111\u1ec3 con c\u00e1i h\u1ecd th\u1ef1c h\u00e0nh \u1edf t\u1eebng h\u00ecnh th\u1ee9c. \u0110\u00e2y l\u00e0 m\u1ed9t c\u00e1ch gi\u00fap tr\u1ebb c\u1ee7ng c\u1ed1 ki\u1ebfn \u200b\u200bth\u1ee9c c\u1ee7a m\u00ecnh, c\u1ea3i thi\u1ec7n c\u00e1c k\u1ef9 n\u0103ng l\u00e0m l\u1edbp 3 trong b\u1ea3ng c\u1ee7a \u0111\u01a1n v\u1ecb \u0111o \u0111\u1ed9 d\u00e0i t\u1ed1t h\u01a1n.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Bieu_mau_toan_hoc_rut_sang_don_vi_lop_3_nang_cao\"><\/span>Bi\u1ec3u m\u1eabu to\u00e1n h\u1ecdc r\u00fat sang \u0111\u01a1n v\u1ecb l\u1edbp 3 n\u00e2ng cao<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>H\u00ecnh th\u1ee9c to\u00e1n h\u1ecdc \u0111\u1ea7u ti\u00ean m\u00e0 em b\u00e9 s\u1ebd c\u00f3 quy\u1ec1n truy c\u1eadp l\u00e0 h\u00ecnh th\u1ee9c r\u00fat ti\u1ec1n cho \u0111\u01a1n v\u1ecb. Theo \u0111\u00f3, b\u1ea1n s\u1ebd t\u00ecm th\u1ea5y gi\u00e1 tr\u1ecb c\u1ee7a m\u1ed9t trong nh\u1eefng ph\u1ea7n b\u1eb1ng nhau. \u0110\u1ec3 gi\u1ea3i quy\u1ebft c\u00e1c b\u00e0i t\u1eadp to\u00e1n r\u00fat ti\u1ec1n cho \u0111\u01a1n v\u1ecb l\u1edbp 3 n\u00e2ng cao n\u00e0y, tr\u1ebb em s\u1ebd th\u1ef1c hi\u1ec7n c\u00e1c b\u01b0\u1edbc sau:<\/p>\n<p style=\"text-align: center\"><img loading=\"lazy\" decoding=\"async\" class=\"lazyload\" src=\"https:\/\/external-content.duckduckgo.com\/iu\/?u=https:\/\/vnmedia2.monkeyuni.net\/upload\/web\/img\/bang-don-vi-do-do-dai-lop-3-03.jpg\" alt=\"H\u00ecnh th\u1ee9c to\u00e1n h\u1ecdc r\u00fat l\u1ea1i cho c\u00e1c h\u1ecdc sinh l\u1edbp 3, nh\u1eefng ng\u01b0\u1eddi c\u1ea7n l\u00e0m quen. (Ngu\u1ed3n h\u00ecnh \u1ea3nh: Internet)\" width=\"800\" height=\"450\"><\/p>\n<ul>\n<li>T\u00ecm m\u1ed9t ph\u1ea7n c\u1ee7a c\u00e1c ph\u1ea7n b\u1eb1ng nhau t\u1eeb v\u1ea5n \u0111\u1ec1 \u0111\u00e3 cho<\/li>\n<li>T\u00ecm nhi\u1ec1u ph\u1ea7n trong c\u00e1c ph\u1ea7n b\u1eb1ng nhau theo y\u00eau c\u1ea7u c\u1ee7a v\u1ea5n \u0111\u1ec1 <\/li>\n<\/ul>\n<p>V\u00ed d\u1ee5: <em>M\u1ed9t \u0111\u1ed9ng t\u00e1c 4 km trong 240 ph\u00fat. Y\u00eau c\u1ea7u AN di chuy\u1ec3n 3 km m\u1ecdi th\u1eddi \u0111\u1ea1i?<\/em><\/p>\n<p><em>\u2192 1 km di chuy\u1ec3n trong ph\u00fat: 240: 4 = 60 ph\u00fat.<\/em><\/p>\n<p><em>3 km M\u1ed9t di chuy\u1ec3n trong v\u00e0i ph\u00fat: 60 x 3 = 180 ph\u00fat.<\/em><\/p>\n<h3><span class=\"ez-toc-section\" id=\"Bai_toan_lop_3_thay_doi_don_vi_do_chieu_dai\"><\/span>B\u00e0i to\u00e1n l\u1edbp 3 thay \u0111\u1ed5i \u0111\u01a1n v\u1ecb \u0111o chi\u1ec1u d\u00e0i<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>H\u00ecnh th\u1ee9c to\u00e1n h\u1ecdc 3 c\u1ea5p \u0111\u1ed9 c\u1ee7a \u0111\u1ed9 d\u00e0i ti\u1ebfp theo m\u00e0 b\u1ea1n c\u1ea7n t\u00ecm hi\u1ec3u l\u00e0 l\u00e0m th\u1ebf n\u00e0o \u0111\u1ec3 thay \u0111\u1ed5i \u0111\u01a1n v\u1ecb \u0111\u1ed9 d\u00e0i. H\u00ecnh th\u1ee9c to\u00e1n h\u1ecdc n\u00e0y s\u1ebd y\u00eau c\u1ea7u tr\u1ebb th\u1ef1c hi\u1ec7n 4 b\u01b0\u1edbc sau:<\/p>\n<ul>\n<li>B\u01b0\u1edbc 1: \u0110\u1ecdc ch\u1ee7 \u0111\u1ec1 v\u00e0 hi\u1ec3u nh\u1eefng g\u00ec y\u00eau c\u1ea7u \u0111\u01b0\u1ee3c y\u00eau c\u1ea7u.<\/li>\n<li>B\u01b0\u1edbc 2: Nh\u1edb l\u1ea1i b\u1ea3ng \u0110\u01a1n v\u1ecb \u0111o chi\u1ec1u d\u00e0i<\/li>\n<li>B\u01b0\u1edbc 3: Th\u1ef1c hi\u1ec7n t\u00ednh to\u00e1n \u0111\u1ec3 chuy\u1ec3n \u0111\u1ed5i<\/li>\n<li>B\u01b0\u1edbc 4: Ki\u1ec3m tra v\u00e0 vi\u1ebft k\u1ebft qu\u1ea3.<\/li>\n<\/ul>\n<p>V\u00ed d\u1ee5: <em>To\u00e1n h\u1ecdc l\u1edbp 3 Thay \u0111\u1ed5i \u0111\u01a1n v\u1ecb sau \u0111\u1ed3ng h\u1ed3:<\/em><\/p>\n<p><em>M\u1ed9t. 1km =?<\/em><\/p>\n<p><em>b. 5hm =?<\/em><\/p>\n<p><em>c. 2dam =?<\/em><\/p>\n<p><em>\u2192 Tr\u1ea3 l\u1eddi: <\/em><\/p>\n<p><em>A.1.000 m<\/em><\/p>\n<p><em>b. 500 m<\/em><\/p>\n<p><em>c. 20 m<\/em><\/p>\n<h3><span class=\"ez-toc-section\" id=\"Mau_toan_so_sanh_tinh_toan_voi_don_vi_do_luong_toan_hoc_lop_3\"><\/span>M\u1eabu to\u00e1n so s\u00e1nh t\u00ednh to\u00e1n v\u1edbi \u0111\u01a1n v\u1ecb \u0111o l\u01b0\u1eddng to\u00e1n h\u1ecdc l\u1edbp 3<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>\u0110\u00e2y l\u00e0 h\u00ecnh th\u1ee9c c\u1ee7a h\u00ecnh th\u1ee9c to\u00e1n h\u1ecdc c\u1ee7a \u0111\u01a1n v\u1ecb \u0111o 3layer li\u00ean quan \u0111\u1ebfn c\u00e1c t\u00ednh to\u00e1n v\u00e0 so s\u00e1nh. \u0110\u1ea7u ti\u00ean, tr\u1ebb em v\u1eabn th\u1ef1c hi\u1ec7n t\u00ednh to\u00e1n t\u01b0\u01a1ng t\u1ef1 nh\u01b0 b\u00ecnh th\u01b0\u1eddng. Sau \u0111\u00f3, tr\u1ebb em ti\u1ebfn h\u00e0nh so s\u00e1nh k\u1ebft qu\u1ea3.<\/p>\n<p style=\"text-align: center\"><img loading=\"lazy\" decoding=\"async\" class=\"lazyload\" src=\"https:\/\/external-content.duckduckgo.com\/iu\/?u=https:\/\/vnmedia2.monkeyuni.net\/upload\/web\/img\/bang-don-vi-do-do-dai-lop-3-04.jpg\" alt=\"T\u00f3m t\u1eaft c\u00e1c h\u00ecnh th\u1ee9c to\u00e1n h\u1ecdc tr\u00ean b\u1ea3ng \u0111\u01a1n v\u1ecb \u0111o 3 -layer. (\u1ea2nh: S\u01b0u t\u1ea7m Internet)\" width=\"800\" height=\"500\"><\/p>\n<p>V\u00ed d\u1ee5: <em>Trong 2 gi\u1edd, Hoang di chuy\u1ec3n 10 km. C\u0169ng trong th\u1eddi gian \u0111\u00f3, Yen di chuy\u1ec3n 5 km. H\u1ecfi trong m\u1ed9t gi\u1edd ai c\u00f3 th\u1ec3 di chuy\u1ec3n nhi\u1ec1u h\u01a1n?<\/em><\/p>\n<p><em>\u2192 Tr\u1ea3 l\u1eddi: <\/em><\/p>\n<p><em>Trong m\u1ed9t gi\u1edd, ho\u00e0ng gia chuy\u1ec3n sang s\u1ed1 km: 10: 2 = 5 (km)<\/em><\/p>\n<p><em>Trong m\u1ed9t gi\u1edd, con nu\u1ed1t c\u00f3 th\u1ec3 di chuy\u1ec3n s\u1ed1 km: 5: 2 = 2,5 (km)<\/em><\/p>\n<p><em>V\u00ec v\u1eady, trong m\u1ed9t gi\u1edd c\u1ee7a phong tr\u00e0o ho\u00e0ng gia c\u00f2n h\u01a1n c\u1ea3 y\u00ean.<\/em><\/p>\n<h3><span class=\"ez-toc-section\" id=\"Hinh_thuc_toan_hoc_cua_Do_don_vi_3_co_the_do_luong_do_dai_hinh_hoc\"><\/span>H\u00ecnh th\u1ee9c to\u00e1n h\u1ecdc c\u1ee7a \u0110o \u0111\u01a1n v\u1ecb 3 c\u00f3 th\u1ec3 \u0111o l\u01b0\u1eddng \u0111\u1ed9 d\u00e0i h\u00ecnh h\u1ecdc<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>\u0110\u1ed1i v\u1edbi c\u00e1c b\u00e0i t\u1eadp tr\u00ean b\u1ea3ng \u0111\u01a1n v\u1ecb 3 -layer 3 \u1edf d\u1ea1ng h\u00ecnh h\u1ecdc, tr\u1ebb em th\u01b0\u1eddng s\u1ebd v\u1ebd chu vi ho\u1eb7c di\u1ec7n t\u00edch c\u1ee7a m\u1ed9t h\u00ecnh h\u1ecdc nh\u1ea5t \u0111\u1ecbnh.<\/p>\n<p>V\u00ed d\u1ee5: <em>H\u00ecnh ch\u1eef nh\u1eadt c\u00f3 chi\u1ec1u d\u00e0i 20 cm, chi\u1ec1u r\u1ed9ng 5 cm. Chu vi c\u1ee7a h\u00ecnh ch\u1eef nh\u1eadt l\u00e0 bao nhi\u00eau?<\/em><\/p>\n<p><em>\u2192 Tr\u1ea3 l\u1eddi: chu vi c\u1ee7a h\u00ecnh ch\u1eef nh\u1eadt l\u00e0: (20 + 5) x 2 = 50 (cm)<\/em><\/p>\n<h3><span class=\"ez-toc-section\" id=\"Van_de_tinh_toan_lop_3_ve_do_dai_cua_phep_do_chieu_dai\"><\/span>V\u1ea5n \u0111\u1ec1 t\u00ednh to\u00e1n l\u1edbp 3 v\u1ec1 \u0111\u1ed9 d\u00e0i c\u1ee7a ph\u00e9p \u0111o chi\u1ec1u d\u00e0i<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Trong c\u00e1c h\u00ecnh th\u1ee9c thay \u0111\u1ed5i \u0111\u01a1n v\u1ecb l\u1edbp 3, ch\u1eafc ch\u1eafn kh\u00f4ng th\u1ec3 kh\u00f4ng \u0111\u1ec1 c\u1eadp \u0111\u1ebfn h\u00ecnh th\u1ee9c t\u00ednh to\u00e1n v\u1edbi \u0111\u01a1n v\u1ecb \u0111o l\u01b0\u1eddng. C\u00e1c b\u01b0\u1edbc \u0111\u1ec3 th\u1ef1c hi\u1ec7n b\u00e0i t\u1eadp n\u00e0y r\u1ea5t \u0111\u01a1n gi\u1ea3n.<\/p>\n<p>\u0110\u1ea7u ti\u00ean, tr\u1ebb em c\u0169ng c\u1ea9n th\u1eadn \u0111\u1ecdc ch\u1ee7 \u0111\u1ec1 \u0111\u1ec3 hi\u1ec3u c\u00e1c y\u00eau c\u1ea7u c\u1ee7a ch\u1ee7 \u0111\u1ec1<\/p>\n<p>Sau \u0111\u00f3, t\u00f4i s\u1ebd th\u1ef1c hi\u1ec7n t\u00ednh to\u00e1n \u0111\u1ec3 \u0111\u01b0a ra k\u1ebft qu\u1ea3 theo y\u00eau c\u1ea7u theo y\u00eau c\u1ea7u. Trong qu\u00e1 tr\u00ecnh th\u1ef1c hi\u1ec7n t\u00ednh to\u00e1n, tr\u1ebb c\u1ea7n ghi nh\u1edb \u0111\u1ed9 d\u00e0i c\u1ee7a c\u00f9ng m\u1ed9t \u0111\u01a1n v\u1ecb \u0111\u1ec3 thay \u0111\u1ed5i th\u00e0nh t\u00ednh to\u00e1n. Khi th\u1ef1c hi\u1ec7n, \u0111\u01a1n v\u1ecb ph\u1ea3i \u0111\u01b0\u1ee3c gi\u1eef.<\/p>\n<p>V\u00ed d\u1ee5:<em> <\/em><em>Th\u1ef1c hi\u1ec7n c\u00e1c t\u00ednh to\u00e1n sau:<\/em><\/p>\n<p><em>M\u1ed9t. 16 km + 8 km =?<\/em><\/p>\n<p><em>b. 45 \u0111\u1eadp &#8211; 10m =?<\/em><\/p>\n<p><em>c. 34 mm: 2 =?<\/em><\/p>\n<p><em>\u2192 Tr\u1ea3 l\u1eddi:<\/em><\/p>\n<p><em>M\u1ed9t. 24 km<\/em><\/p>\n<p><em>b. 440 m <\/em><\/p>\n<p><em>c. 17 mm<\/em><\/p>\n<table style=\"border-collapse: collapse;margin-left: auto;margin-right: auto;width: 100%;background-color: #fbeeb8\" border=\"1\">\n<tr>\n<td style=\"width: 98.5932%;text-align: center\">Cha m\u1eb9 mu\u1ed1n con c\u00e1i ph\u00e1t tri\u1ec3n t\u01b0 duy to\u00e1n h\u1ecdc t\u1ed1t, t\u00ednh to\u00e1n v\u00e0 kh\u1ea3 n\u0103ng ng\u00f4n ng\u1eef? Ch\u1ecdn \u1ee8ng d\u1ee5ng To\u00e1n Shining Home &#8211; Gia \u0111\u00ecnh Anh Ng\u1eef \u0111\u1ec3 d\u1ea1y to\u00e1n h\u1ecdc cho tr\u1ebb m\u1eabu gi\u00e1o v\u00e0 h\u1ecdc sinh ti\u1ec3u h\u1ecdc theo Ch\u01b0\u01a1ng tr\u00ecnh Gi\u00e1o d\u1ee5c m\u1edbi b\u1eb1ng ti\u1ebfng Anh.  <img decoding=\"async\" style=\"margin-left: auto;margin-right: auto\" class=\"lazyload\" src=\"https:\/\/external-content.duckduckgo.com\/iu\/?u=https:\/\/vnmedia2.monkeyuni.net\/upload\/web\/img\/timhieungay.png\" width=\"185\"><\/td>\n<\/tr>\n<\/table>\n<p style=\"text-align: center\"><img loading=\"lazy\" decoding=\"async\" class=\"lazyload\" src=\"https:\/\/external-content.duckduckgo.com\/iu\/?u=https:\/\/vnmedia2.monkeyuni.net\/upload\/web\/img\/bang-don-vi-do-do-dai-lop-3-05.jpg\" alt=\"H\u00ecnh th\u1ee9c t\u1eadp th\u1ec3 d\u1ee5c v\u1edbi \u0111\u01a1n v\u1ecb \u0111o chi\u1ec1u d\u00e0i. (\u1ea2nh: B\u1ed9 s\u01b0u t\u1eadp Internet)\" width=\"800\" height=\"449\"><\/p>\n<h2><span class=\"ez-toc-section\" id=\"Cach_hoc_Toan_lop_3_trong_don_vi_Don_vi_do_luong_hieu_qua\"><\/span>C\u00e1ch h\u1ecdc To\u00e1n l\u1edbp 3 trong \u0111\u01a1n v\u1ecb \u0110\u01a1n v\u1ecb \u0111o l\u01b0\u1eddng hi\u1ec7u qu\u1ea3<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>\u0110\u1ec3 gi\u00fap tr\u1ebb em c\u00f3 th\u1ec3 h\u1ecdc l\u1edbp 3 v\u1ec1 m\u1eb7t to\u00e1n h\u1ecdc v\u1ec1 c\u00e1c \u0111\u01a1n v\u1ecb \u0111o l\u01b0\u1eddng hi\u1ec7u qu\u1ea3, \u0111\u00e2y l\u00e0 m\u1ed9t v\u00e0i b\u00ed m\u1eadt m\u00e0 ph\u1ee5 huynh kh\u00f4ng n\u00ean b\u1ecf qua \u0111\u1ec3 d\u1ea1y ch\u00fang.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Nghien_cuu_ve_mat_toan_hoc_lop_3_don_vi_do_do_dai_truc_tuyen_hieu_qua_voi_toan_hoc_khi\"><\/span>Nghi\u00ean c\u1ee9u v\u1ec1 m\u1eb7t to\u00e1n h\u1ecdc l\u1edbp 3, \u0111\u01a1n v\u1ecb \u0111o \u0111\u1ed9 d\u00e0i tr\u1ef1c tuy\u1ebfn hi\u1ec7u qu\u1ea3 v\u1edbi to\u00e1n h\u1ecdc kh\u1ec9<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>M\u1ed9t b\u00ed m\u1eadt cho tr\u1ebb em h\u1ecdc to\u00e1n l\u1edbp 3 trong \u0111\u01a1n v\u1ecb \u0111o l\u01b0\u1eddng hi\u1ec7u qu\u1ea3 nh\u1ea5t l\u00e0 ph\u1ee5 huynh n\u00ean cho con c\u00e1i h\u1ecdc \u1ee9ng d\u1ee5ng to\u00e1n h\u1ecdc kh\u1ec9. \u0110\u00e2y l\u00e0 m\u1ed9t trong nh\u1eefng \u1ee9ng d\u1ee5ng to\u00e1n h\u1ecdc c\u1ef1c k\u1ef3 hi\u1ec7u qu\u1ea3, gi\u00fap tr\u1ebb h\u1ecdc to\u00e1n t\u1ed1t v\u1ec1 \u0111\u01a1n v\u1ecb \u0111o \u0111\u1ed9 d\u00e0i v\u00e0 ki\u1ebfn \u200b\u200bth\u1ee9c to\u00e1n h\u1ecdc n\u00f3i chung.<\/p>\n<p>Ch\u01b0\u01a1ng tr\u00ecnh \u0111\u01b0\u1ee3c Shining Home &#8211; Gia \u0111\u00ecnh Anh Ng\u1eef Math th\u1ef1c hi\u1ec7n nh\u01b0 m\u1ed9t ch\u01b0\u01a1ng tr\u00ecnh \u0111\u00e0o t\u1ea1o gi\u00e1o d\u1ee5c chung m\u1edbi cho tr\u1ebb m\u1eabu gi\u00e1o v\u00e0 tr\u1ebb em ti\u1ec3u h\u1ecdc. \u1ee8ng d\u1ee5ng h\u1ecdc t\u1eadp n\u00e0y s\u1ebd gi\u00fap tr\u1ebb h\u1ecdc t\u1ed1t \u0111\u01a1n v\u1ecb \u0111o l\u01b0\u1eddng n\u00f3i ri\u00eang v\u00e0 ki\u1ebfn \u200b\u200bth\u1ee9c to\u00e1n h\u1ecdc n\u00f3i chung.<\/p>\n<p>Ch\u01b0\u01a1ng tr\u00ecnh \u0111\u01b0\u1ee3c th\u1ef1c hi\u1ec7n b\u1edfi Shining Home &#8211; Gia \u0111\u00ecnh Anh Ng\u1eef Math l\u00e0 m\u1ed9t ch\u01b0\u01a1ng tr\u00ecnh gi\u00e1o d\u1ee5c ph\u1ed5 th\u00f4ng m\u1edbi, v\u00ec v\u1eady m\u1ed7i b\u00e0i h\u1ecdc l\u00e0 ki\u1ebfn \u200b\u200bth\u1ee9c m\u00e0 tr\u1ebb em s\u1ebd h\u1ecdc trong l\u1edbp.<\/p>\n<p><img decoding=\"async\" class=\"lazyload\" src=\"https:\/\/external-content.duckduckgo.com\/iu\/?u=https:\/\/vnmedia2.monkeyuni.net\/upload\/web\/img\/monkey-math-2.jpg\" alt=\"Tham gia c\u00f9ng tr\u1ebb em \u0111\u1ec3 h\u1ecdc to\u00e1n th\u00fa v\u1ecb v\u1edbi Shining Home - Gia \u0111\u00ecnh Anh Ng\u1eef Math (\u1ea2nh: Kh\u1ec9)\" width=\"100%\"><\/p>\n<p>\u0110\u1eb7c bi\u1ec7t, ph\u1ea7n to\u00e1n h\u1ecdc v\u1edbi \u0111\u01a1n v\u1ecb \u0111\u01a1n v\u1ecb \u0111o l\u01b0\u1eddng s\u1ebd lu\u00f4n c\u00f3 m\u1ed9t h\u00ecnh \u1ea3nh r\u1ea5t s\u1ed1ng \u0111\u1ed9ng c\u1ee7a Minh Hoc, gi\u00fap tr\u1ebb kh\u00f4ng b\u1ecb ch\u00e1n. B\u00ean c\u1ea1nh \u0111\u00f3, b\u1ecdn tr\u1ebb s\u1ebd h\u1ecdc h\u1ecfi th\u00f4ng qua vi\u1ec7c l\u00e0m b\u00e0i t\u1eadp v\u1ec1 nh\u00e0 v\u1edbi c\u00e1c tr\u00f2 ch\u01a1i t\u01b0\u01a1ng t\u00e1c r\u1ea5t th\u00fa v\u1ecb. Do \u0111\u00f3, tr\u1ebb em c\u00f3 th\u1ec3 ch\u1ee7 \u0111\u1ed9ng h\u01a1n trong vi\u1ec7c ti\u1ebfp c\u1eadn c\u00e1c ngu\u1ed3n ki\u1ebfn \u200b\u200bth\u1ee9c.<\/p>\n<p>Ph\u1ee5 huynh c\u00f3 th\u1ec3 t\u00ecm hi\u1ec3u th\u00eam v\u1ec1 To\u00e1n Shining Home &#8211; Gia \u0111\u00ecnh Anh Ng\u1eef th\u00f4ng qua video sau \u0111\u00e2y ho\u1eb7c t\u1ea3i xu\u1ed1ng \u1ee9ng d\u1ee5ng mi\u1ec5n ph\u00ed \u0111\u1ec3 tr\u1ea3i nghi\u1ec7m tr\u1ea3i nghi\u1ec7m hi\u1ec7u qu\u1ea3 m\u00e0 s\u1ea3n ph\u1ea9m n\u00e0y mang l\u1ea1i.<\/p>\n<p 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>T\u1ea3i xu\u1ed1ng Shining Home &#8211; Gia \u0111\u00ecnh Anh Ng\u1eef Math mi\u1ec5n ph\u00ed cho \u0111i\u1ec7n tho\u1ea1i Android<\/p>\n<p>T\u1ea3i xu\u1ed1ng Shining Home &#8211; Gia \u0111\u00ecnh Anh Ng\u1eef Math mi\u1ec5n ph\u00ed cho \u0111i\u1ec7n tho\u1ea1i iOS<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Hay_chac_chan_rang_em_be_cua_ban_ghi_nho_bang_don_vi_lop_3\"><\/span>H\u00e3y ch\u1eafc ch\u1eafn r\u1eb1ng em b\u00e9 c\u1ee7a b\u1ea1n ghi nh\u1edb b\u1ea3ng \u0111\u01a1n v\u1ecb l\u1edbp 3<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Ph\u1ee5 huynh mu\u1ed1n con c\u00e1i h\u1ecd h\u1ecdc \u0111\u01a1n v\u1ecb \u0111\u1ed9 d\u00e0i to\u00e1n l\u1edbp 3 s\u1ebd gi\u00fap con c\u00e1i nh\u1edb l\u1ea1i b\u1ea3ng \u0111\u01a1n v\u1ecb. Ch\u1ec9 khi tr\u1ebb nh\u1edb b\u1ea3ng \u0110\u01a1n v\u1ecb \u0111o 3 ng\u01b0\u1eddi c\u00f3 th\u1ec3 th\u1ef1c hi\u1ec7n c\u00e1c b\u00e0i t\u1eadp m\u1ed9t c\u00e1ch d\u1ec5 d\u00e0ng. B\u1edfi v\u00ec khi gi\u1ea3i quy\u1ebft t\u1ea5t c\u1ea3 c\u00e1c lo\u1ea1i b\u00e0i t\u1eadp li\u00ean quan \u0111\u1ebfn chi\u1ec1u d\u00e0i \u0111\u01a1n v\u1ecb d\u1ef1a tr\u00ean b\u1ea3ng \u0111\u01a1n v\u1ecb c\u00f3 \u0111\u1ed9 d\u00e0i.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"lazyload\" src=\"https:\/\/external-content.duckduckgo.com\/iu\/?u=https:\/\/vnmedia2.monkeyuni.net\/upload\/web\/img\/bang-don-vi-do-do-dai-lop-3-07.jpg\" alt=\"Ph\u1ee5 huynh v\u00e0 tr\u1ebb em nh\u1edb \u0111\u01a1n v\u1ecb c\u1ee7a \u0111\u01a1n v\u1ecb \u0111o \u0111\u1ed9 d\u00e0i khi l\u00e0m to\u00e1n. (\u1ea2nh: B\u1ed9 s\u01b0u t\u1eadp Internet)\" width=\"800\" height=\"350\"><\/p>\n<h3><span class=\"ez-toc-section\" id=\"Nghien_cuu_don_vi_toan_hoc_do_do_dai_toan_hoc_lop_3_bang_cach_lien_he_voi_thuc_te\"><\/span>Nghi\u00ean c\u1ee9u \u0111\u01a1n v\u1ecb to\u00e1n h\u1ecdc \u0111o \u0111\u1ed9 d\u00e0i to\u00e1n h\u1ecdc l\u1edbp 3 b\u1eb1ng c\u00e1ch li\u00ean h\u1ec7 v\u1edbi th\u1ef1c t\u1ebf<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>\u0110\u1ec3 h\u1ecdc \u1edf L\u1edbp 3, \u0111\u01a1n v\u1ecb \u0111o l\u01b0\u1eddng \u0111\u1ed9 d\u00e0i hi\u1ec7u qu\u1ea3, c\u00e1ch t\u1ed1t nh\u1ea5t l\u00e0 ph\u1ee5 huynh n\u00ean d\u1ea1y cho tr\u1ebb em v\u1edbi c\u00e1c b\u00e0i h\u1ecdc ti\u1ebfp x\u00fac th\u1ef1c t\u1ebf. V\u00ed d\u1ee5, cha m\u1eb9 c\u00f3 th\u1ec3 y\u00eau c\u1ea7u con c\u00e1i t\u00ednh to\u00e1n kho\u1ea3ng c\u00e1ch t\u1eeb nh\u00e0 \u0111\u1ebfn tr\u01b0\u1eddng, t\u1eeb tr\u01b0\u1eddng \u0111\u1ebfn c\u1eeda h\u00e0ng th\u1ee9c \u0103n nhanh, &#8230; B\u00ean c\u1ea1nh \u0111\u00f3, cha m\u1eb9 c\u0169ng c\u00f3 th\u1ec3 y\u00eau c\u1ea7u em b\u00e9 t\u00ednh to\u00e1n kho\u1ea3ng c\u00e1ch \u0111i trong m\u1ed9t kho\u1ea3ng th\u1eddi gian nh\u1ea5t \u0111\u1ecbnh, &#8230;<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Tham_gia_cung_em_be_cua_ban_de_choi_tro_choi_ve_viec_dem_va_so_sanh_do_dai\"><\/span>Tham gia c\u00f9ng em b\u00e9 c\u1ee7a b\u1ea1n \u0111\u1ec3 ch\u01a1i tr\u00f2 ch\u01a1i v\u1ec1 vi\u1ec7c \u0111\u1ebfm v\u00e0 so s\u00e1nh \u0111\u1ed9 d\u00e0i<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>M\u1ed9t trong nh\u1eefng c\u00e1ch hi\u1ec7u qu\u1ea3 nh\u1ea5t \u0111\u1ec3 h\u1ecdc \u0111\u01a1n v\u1ecb l\u1edbp 3 l\u00e0 ph\u1ee5 huynh n\u00ean tham gia c\u00f9ng con c\u00e1i trong tr\u00f2 ch\u01a1i \u0111\u1ebfm v\u00e0 so s\u00e1nh \u0111\u1ed9 d\u00e0i. H\u1ecdc t\u1eadp v\u00e0 ch\u01a1i s\u1ebd gi\u00fap tr\u1ebb lu\u00f4n quan t\u00e2m \u0111\u1ebfn vi\u1ec7c ti\u1ebfp c\u1eadn ki\u1ebfn \u200b\u200bth\u1ee9c v\u1ec1 \u0111\u1ed9 d\u00e0i. <\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"lazyload\" src=\"https:\/\/external-content.duckduckgo.com\/iu\/?u=https:\/\/vnmedia2.monkeyuni.net\/upload\/web\/img\/bang-don-vi-do-do-dai-lop-3-08.jpg\" alt=\"H\u00e3y ch\u01a1i v\u00e0 h\u1ecdc v\u1edbi \u0111\u1ed9 d\u00e0i to\u00e1n l\u1edbp 3. (\u1ea2nh: S\u01b0u t\u1ea7m Internet)\" width=\"800\" height=\"599\"><\/p>\n<p>Khi h\u1ecdc, b\u1ecdn tr\u1ebb s\u1ebd kh\u00f4ng bao gi\u1edd c\u1ea3m th\u1ea5y \u00e1p l\u1ef1c v\u00ec nh\u1eefng tr\u00f2 ch\u01a1i th\u00fa v\u1ecb mang l\u1ea1i. Cha m\u1eb9 c\u00f3 th\u1ec3 di chuy\u1ec3n v\u1edbi con c\u00e1i c\u1ee7a h\u1ecd v\u1edbi m\u1ed9t kho\u1ea3ng c\u00e1ch nh\u1ea5t \u0111\u1ecbnh. Sau \u0111\u00f3, cha m\u1eb9 s\u1ebd y\u00eau c\u1ea7u em b\u00e9 so s\u00e1nh kho\u1ea3ng c\u00e1ch h\u1ecd v\u00e0 con c\u00e1i h\u1ecd di chuy\u1ec3n. Ai di chuy\u1ec3n nhi\u1ec1u h\u01a1n s\u1ebd gi\u00e0nh chi\u1ebfn th\u1eafng, nh\u1eadn qu\u00e0, &#8230;<\/p>\n<p>Nh\u1eefng tr\u00f2 ch\u01a1i nh\u01b0 v\u1eady s\u1ebd gi\u00fap tr\u1ebb gi\u1ea3m c\u0103ng th\u1eb3ng sau gi\u1edd h\u1ecdc, t\u1eadp th\u1ec3 d\u1ee5c v\u00e0 c\u00f3 th\u1ec3 h\u1ecdc t\u1ed1t h\u01a1n l\u1edbp 3.<\/p>\n<p>T\u00ecm hi\u1ec3u th\u00eam:<\/p>\n<ul>\n<li>C\u00e1ch gi\u1ea3i 4 b\u00e0i t\u1eadp to\u00e1n h\u1ecdc v\u1edbi m\u1ed9t s\u1ed1 b\u00e0i t\u1eadp d\u1ec5 nh\u1ea5t cho em b\u00e9 c\u1ee7a b\u1ea1n<\/li>\n<li>L\u00fd thuy\u1ebft v\u00e0 c\u00e1ch l\u00e0m m\u1ed9t s\u1ed1 b\u00e0i t\u1eadp v\u1ec1 nh\u00e0 v\u1edbi l\u1edbp 4 d\u1ec5 nh\u1ea5t<\/li>\n<\/ul>\n<h2><span class=\"ez-toc-section\" id=\"Ket_luan\"><\/span>K\u1ebft lu\u1eadn<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Tr\u00ean \u0111\u00e2y l\u00e0 th\u00f4ng tin chia s\u1ebb v\u1ec1 ki\u1ebfn \u200b\u200bth\u1ee9c c\u1ee7a \u0111\u01a1n v\u1ecb \u0111o l\u1edbp th\u1ee9 3. Hy v\u1ecdng r\u1eb1ng th\u00f4ng tin n\u00e0y s\u1ebd l\u00e0 m\u1ed9t ngu\u1ed3n th\u00f4ng tin h\u1eefu \u00edch \u0111\u1ec3 tr\u1ebb h\u1ecdc to\u00e1n m\u1ed9t c\u00e1ch hi\u1ec7u qu\u1ea3.<\/p>\n<p>Ngu\u1ed3n: <a href=\"https:\/\/www.ckconitsha.com\/vn\/\">https:\/\/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>Ki\u1ebfn th\u1ee9c v\u1ec1 b\u1ea3ng \u0110\u01a1n v\u1ecb \u0111o l\u01b0\u1eddng l\u1edbp 3 kh\u00f4ng qu\u00e1 kh\u00f3, nh\u01b0ng n\u00f3 l\u00e0m cho tr\u1ebb r\u1ea5t d\u1ec5 b\u1ecb nh\u1ea7m l\u1eabn, d\u1eabn \u0111\u1ebfn t\u00ednh to\u00e1n sai. Do \u0111\u00f3, \u0111\u1ec3 gi\u00fap con b\u1ea1n chinh ph\u1ee5c c\u00e1c b\u00e0i t\u1eadp c\u1ee7a h\u00ecnh th\u1ee9c n\u00e0y t\u1eeb c\u01a1 b\u1ea3n \u0111\u1ebfn c\u1ea3i thi\u1ec7n hi\u1ec7u qu\u1ea3, cha m\u1eb9, h\u00e3y \u0111\u1ec3&#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-8628","post","type-post","status-publish","format-standard","hentry","category-kien-thuc"],"_links":{"self":[{"href":"https:\/\/www.ckconitsha.com\/vn\/wp-json\/wp\/v2\/posts\/8628","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=8628"}],"version-history":[{"count":2,"href":"https:\/\/www.ckconitsha.com\/vn\/wp-json\/wp\/v2\/posts\/8628\/revisions"}],"predecessor-version":[{"id":8754,"href":"https:\/\/www.ckconitsha.com\/vn\/wp-json\/wp\/v2\/posts\/8628\/revisions\/8754"}],"wp:attachment":[{"href":"https:\/\/www.ckconitsha.com\/vn\/wp-json\/wp\/v2\/media?parent=8628"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.ckconitsha.com\/vn\/wp-json\/wp\/v2\/categories?post=8628"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.ckconitsha.com\/vn\/wp-json\/wp\/v2\/tags?post=8628"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}