{"id":14983,"date":"2025-06-11T08:49:20","date_gmt":"2025-06-11T01:49:20","guid":{"rendered":"https:\/\/www.ckconitsha.com\/vn\/?p=14983"},"modified":"2025-07-05T22:30:04","modified_gmt":"2025-07-05T15:30:04","slug":"huong-dan-hoc-va-giai-bai-tap-toan-lop-4-tim-x-de-hieu","status":"publish","type":"post","link":"https:\/\/www.ckconitsha.com\/vn\/huong-dan-hoc-va-giai-bai-tap-toan-lop-4-tim-x-de-hieu\/","title":{"rendered":"H\u01b0\u1edbng d\u1eabn h\u1ecdc v\u00e0 gi\u1ea3i b\u00e0i t\u1eadp to\u00e1n l\u1edbp 4 t\u00ecm x d\u1ec5 hi\u1ec3u"},"content":{"rendered":"<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_79_2 counter-hierarchy ez-toc-counter ez-toc-grey ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title\" style=\"cursor:inherit\">Table of Contents<\/p>\n<span class=\"ez-toc-title-toggle\"><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1 ' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/www.ckconitsha.com\/vn\/huong-dan-hoc-va-giai-bai-tap-toan-lop-4-tim-x-de-hieu\/#Toan_hoc_lop_4_pho_bien\" >To\u00e1n h\u1ecdc l\u1edbp 4 ph\u1ed5 bi\u1ebfn<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/www.ckconitsha.com\/vn\/huong-dan-hoc-va-giai-bai-tap-toan-lop-4-tim-x-de-hieu\/#Mau_1_Co_ban\" >M\u1eabu 1: C\u01a1 b\u1ea3n<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/www.ckconitsha.com\/vn\/huong-dan-hoc-va-giai-bai-tap-toan-lop-4-tim-x-de-hieu\/#Mau_2_Phia_ben_trai_la_mot_bieu_thuc_co_2_tinh_toan_Phia_ben_phai_la_mot_con_so\" >M\u1eabu 2: Ph\u00eda b\u00ean tr\u00e1i l\u00e0 m\u1ed9t bi\u1ec3u th\u1ee9c, c\u00f3 2 t\u00ednh to\u00e1n. Ph\u00eda b\u00ean ph\u1ea3i l\u00e0 m\u1ed9t con s\u1ed1.<\/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\/huong-dan-hoc-va-giai-bai-tap-toan-lop-4-tim-x-de-hieu\/#Mau_3_Ben_trai_la_mot_bieu_thuc_co_2_tinh_toan_Phia_ben_phai_la_bieu_thuc\" >M\u1eabu 3. B\u00ean tr\u00e1i l\u00e0 m\u1ed9t bi\u1ec3u th\u1ee9c, c\u00f3 2 t\u00ednh to\u00e1n. Ph\u00eda b\u00ean ph\u1ea3i l\u00e0 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-5\" href=\"https:\/\/www.ckconitsha.com\/vn\/huong-dan-hoc-va-giai-bai-tap-toan-lop-4-tim-x-de-hieu\/#Mau_4_Ben_trai_la_1_bieu_thuc_chua_dau_ngoac_don_co_2_tinh_toan_Phia_ben_phai_la_1_so\" >M\u1eabu 4. B\u00ean tr\u00e1i l\u00e0 1 bi\u1ec3u th\u1ee9c ch\u1ee9a d\u1ea5u ngo\u1eb7c \u0111\u01a1n, c\u00f3 2 t\u00ednh to\u00e1n. Ph\u00eda b\u00ean ph\u1ea3i l\u00e0 1 s\u1ed1.<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/www.ckconitsha.com\/vn\/huong-dan-hoc-va-giai-bai-tap-toan-lop-4-tim-x-de-hieu\/#Mau_5_Ben_trai_la_mot_bieu_thuc_chua_dau_ngoac_don_voi_2_tinh_toan_Phia_ben_phai_la_tong_so_hieu_qua_va_san_pham\" >M\u1eabu 5. B\u00ean tr\u00e1i l\u00e0 m\u1ed9t bi\u1ec3u th\u1ee9c ch\u1ee9a d\u1ea5u ngo\u1eb7c \u0111\u01a1n, v\u1edbi 2 t\u00ednh to\u00e1n. Ph\u00eda b\u00ean ph\u1ea3i l\u00e0 t\u1ed5ng s\u1ed1, hi\u1ec7u qu\u1ea3 v\u00e0 s\u1ea3n ph\u1ea9m.<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/www.ckconitsha.com\/vn\/huong-dan-hoc-va-giai-bai-tap-toan-lop-4-tim-x-de-hieu\/#Kien_thuc_can_nho_khi_giai_toan_lop_4_tim_thay_x\" >Ki\u1ebfn th\u1ee9c c\u1ea7n nh\u1edb khi gi\u1ea3i to\u00e1n l\u1edbp 4 t\u00ecm th\u1ea5y x<\/a><\/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\/huong-dan-hoc-va-giai-bai-tap-toan-lop-4-tim-x-de-hieu\/#Bi_quyet_hoc_tap_va_ghi_nho_kien_%E2%80%8B%E2%80%8Bthuc_toan_hoc_lop_4_de_tim_X_mot_cach_hieu_qua\" >B\u00ed quy\u1ebft h\u1ecdc t\u1eadp v\u00e0 ghi nh\u1edb ki\u1ebfn \u200b\u200bth\u1ee9c to\u00e1n h\u1ecdc l\u1edbp 4 \u0111\u1ec3 t\u00ecm X m\u1ed9t c\u00e1ch hi\u1ec7u qu\u1ea3<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-9\" href=\"https:\/\/www.ckconitsha.com\/vn\/huong-dan-hoc-va-giai-bai-tap-toan-lop-4-tim-x-de-hieu\/#Mot_so_bai_tap_de_tim_X_biet_lop_4_de_tre_thuc_hanh\" >M\u1ed9t s\u1ed1 b\u00e0i t\u1eadp \u0111\u1ec3 t\u00ecm X bi\u1ebft l\u1edbp 4 \u0111\u1ec3 tr\u1ebb 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-10\" href=\"https:\/\/www.ckconitsha.com\/vn\/huong-dan-hoc-va-giai-bai-tap-toan-lop-4-tim-x-de-hieu\/#Ket_luan\" >K\u1ebft lu\u1eadn<\/a><\/li><\/ul><\/nav><\/div>\n<\/p>\n<p>To\u00e1n h\u1ecdc l\u1edbp 4 T\u00ecm X l\u00e0 m\u1ed9t trong nh\u1eefng lo\u1ea1i b\u00e0i t\u1eadp m\u00e0 h\u1ecd s\u1ebd h\u1ecdc, l\u00e0m quen v\u00e0 \u0111\u1eb7c bi\u1ec7t ch\u00fang xu\u1ea5t hi\u1ec7n ph\u1ed5 bi\u1ebfn trong c\u00e1c c\u00e2u h\u1ecfi thi. V\u00ec v\u1eady, \u0111\u1ec3 gi\u00fap b\u00e9 d\u1ec5 d\u00e0ng chinh ph\u1ee5c lo\u1ea1i to\u00e1n h\u1ecdc n\u00e0y, h\u00e3y t\u00ecm ra c\u00e1c lo\u1ea1i b\u00e0i t\u1eadp v\u00e0 c\u00e1ch gi\u1ea3i to\u00e1n \u0111\u1ec3 t\u00ecm chi ti\u1ebft c\u1ea5p 4 trong b\u00e0i vi\u1ebft sau.<\/p>\n<p>                                                                    <img decoding=\"async\" src=\"https:\/\/external-content.duckduckgo.com\/iu\/?u=https:\/\/vnmedia2.monkeyuni.net\/upload\/web\/img_default\/monkey3.png\" alt=\"\"><\/p>\n<p class=\"title\">H\u00e0ng tri\u1ec7u tr\u1ebb em \u0111\u00e3 ph\u00e1t tri\u1ec3n c\u00e1c k\u1ef9 n\u0103ng ng\u00f4n ng\u1eef c\u1ee7a ch\u00fang th\u00f4ng qua c\u00e1c \u1ee9ng d\u1ee5ng h\u1ecdc t\u1eadp c\u1ee7a kh\u1ec9<\/p>\n<p class=\"description\">\u0110\u0103ng k\u00fd ngay \u0111\u1ec3 \u0111\u01b0\u1ee3c t\u01b0 v\u1ea5n mi\u1ec5n ph\u00ed v\u1ec1 c\u00e1c s\u1ea3n ph\u1ea9m v\u00e0 tuy\u1ebfn h\u1ecdc h\u1ecdc cho tr\u1ebb em.<\/p>\n<p>                                                                            *Vui l\u00f2ng ki\u1ec3m tra t\u00ean \u0111\u1ea7y \u0111\u1ee7 c\u1ee7a b\u1ea1n *Vui l\u00f2ng ki\u1ec3m tra s\u1ed1 \u0111i\u1ec7n tho\u1ea1i \u0111\u1ec3 \u0111\u01b0\u1ee3c t\u01b0 v\u1ea5n mi\u1ec5n ph\u00ed<\/p>\n<h2 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Toan_hoc_lop_4_pho_bien\"><\/span>To\u00e1n h\u1ecdc l\u1edbp 4 ph\u1ed5 bi\u1ebfn<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p dir=\"ltr\">V\u1edbi v\u1ea5n \u0111\u1ec1 t\u00ecm X, tr\u1ebb em \u0111\u00e3 h\u1ecdc v\u00e0 l\u00e0m quen t\u1eeb L\u1edbp 1, 2 v\u00e0 3.<\/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\/toan-lop-4-tim-x-1.jpg\" alt=\"C\u00f4ng th\u1ee9c Khi gi\u1ea3i t\u1eadp c\u00e1c b\u00e0i t\u1eadp \u0111\u1ec3 t\u00ecm X trong to\u00e1n h\u1ecdc. (\u1ea2nh: B\u1ed9 s\u01b0u t\u1eadp Internet)\" width=\"100%\"><\/p>\n<h3 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Mau_1_Co_ban\"><\/span>M\u1eabu 1: C\u01a1 b\u1ea3n<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p dir=\"ltr\">Gi\u1ea3i ph\u00e1p: \u00c1p d\u1ee5ng c\u00e1c quy t\u1eafc khi th\u1ef1c hi\u1ec7n b\u1ed5 sung, tr\u1eeb, nh\u00e2n v\u00e0 chia. Ti\u1ebfn h\u00e0nh t\u00ednh to\u00e1n v\u00e0 k\u1ebft qu\u1ea3 ki\u1ec3m tra.<\/p>\n<p dir=\"ltr\"><em>V\u00ed d\u1ee5: T\u00ecm x bi\u1ebft.<\/em><\/p>\n<p dir=\"ltr\"><em>A) X + 678 = 7818        <\/em><\/p>\n<p dir=\"ltr\"><em>b) 4029 + x = 7684            <\/em><\/p>\n<p dir=\"ltr\"><em>H\u01b0\u1edbng d\u1eabn gi\u1ea3i ph\u00e1p:<\/em><\/p>\n<p dir=\"ltr\"><em>A) X + 678 = 7818      <\/em><\/p>\n<p dir=\"ltr\"><em>x = 7818 &#8211; 678<\/em><\/p>\n<p dir=\"ltr\"><em>x = 7140  <\/em><\/p>\n<p dir=\"ltr\"><em>b) 4029 + x = 7684     <\/em><\/p>\n<p dir=\"ltr\"><em>x = 7684 &#8211; 4029<\/em><\/p>\n<p dir=\"ltr\"><em>x = 3655       <\/em><\/p>\n<h3 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Mau_2_Phia_ben_trai_la_mot_bieu_thuc_co_2_tinh_toan_Phia_ben_phai_la_mot_con_so\"><\/span>M\u1eabu 2: Ph\u00eda b\u00ean tr\u00e1i l\u00e0 m\u1ed9t bi\u1ec3u th\u1ee9c, c\u00f3 2 t\u00ednh to\u00e1n. Ph\u00eda b\u00ean ph\u1ea3i l\u00e0 m\u1ed9t con s\u1ed1.<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p dir=\"ltr\">Gi\u1ea3i ph\u00e1p: H\u1ecd c\u0169ng \u00e1p d\u1ee5ng c\u00e1c quy t\u1eafc t\u00ednh to\u00e1n. L\u01b0u \u00fd r\u1eb1ng khi chuy\u1ec3n c\u00e1c c\u1ea1nh, c\u1ea7n ph\u1ea3i thay \u0111\u1ed5i s\u1ed1 l\u01b0\u1ee3ng c\u00e1c d\u1ea5u hi\u1ec7u m\u1edbi \u0111\u01b0\u1ee3c chuy\u1ec3n v\u00e0 sau \u0111\u00f3 th\u1ef1c hi\u1ec7n t\u00ednh to\u00e1n nh\u01b0 b\u00ecnh th\u01b0\u1eddng.<\/p>\n<p dir=\"ltr\"><em>V\u00ed d\u1ee5: T\u00ecm x bi\u1ebft.<\/em><\/p>\n<p dir=\"ltr\"><em>A) X + 1234 + 3012 = 4724<\/em><\/p>\n<p dir=\"ltr\"><em>B) X &#8211; 285 + 85 = 2495<\/em><\/p>\n<p dir=\"ltr\"><em>Gi\u1ea3i ph\u00e1p:<\/em><\/p>\n<p dir=\"ltr\"><em>A) X + 1234 + 3012 = 4724<\/em><\/p>\n<p dir=\"ltr\"><em>x + 4246 = 4724<\/em><\/p>\n<p dir=\"ltr\"><em>x = 4724 &#8211; 4246<\/em><\/p>\n<p dir=\"ltr\"><em>x = 478<\/em><\/p>\n<p dir=\"ltr\"><em>B) X &#8211; 285 + 85 = 2495<\/em><\/p>\n<p dir=\"ltr\"><em>X &#8211; 200 = 2495<\/em><\/p>\n<p dir=\"ltr\"><em>x = 2495 + 200<\/em><\/p>\n<p dir=\"ltr\"><em>x = 2695<\/em><\/p>\n<h3 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Mau_3_Ben_trai_la_mot_bieu_thuc_co_2_tinh_toan_Phia_ben_phai_la_bieu_thuc\"><\/span>M\u1eabu 3. B\u00ean tr\u00e1i l\u00e0 m\u1ed9t bi\u1ec3u th\u1ee9c, c\u00f3 2 t\u00ednh to\u00e1n. Ph\u00eda b\u00ean ph\u1ea3i l\u00e0 bi\u1ec3u th\u1ee9c<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p dir=\"ltr\">Ph\u01b0\u01a1ng ph\u00e1p: \u00c1p d\u1ee5ng c\u00e1c quy t\u1eafc \u0111\u1ec3 th\u1ef1c hi\u1ec7n c\u00e1c t\u00ednh to\u00e1n, sau \u0111\u00f3 ti\u1ebfn h\u00e0nh gi\u1ea3i quy\u1ebft c\u00e1c t\u00ednh to\u00e1n \u1edf ph\u00eda b\u00ean ph\u1ea3i tr\u01b0\u1edbc b\u00ean tr\u00e1i.<\/p>\n<p dir=\"ltr\"><em>V\u00ed d\u1ee5: T\u00ecm x bi\u1ebft<\/em><\/p>\n<p dir=\"ltr\"><em>A) X + 847 x 2 = 1953 &#8211; 74<\/em><\/p>\n<p dir=\"ltr\"><em>B) X: (7 x 18) = 5839 + 8591<\/em><\/p>\n<p dir=\"ltr\"><em>H\u01b0\u1edbng d\u1eabn gi\u1ea3i ph\u00e1p:<\/em><\/p>\n<p dir=\"ltr\"><em>A) X + 847 x 2 = 1953 &#8211; 74<\/em><\/p>\n<p dir=\"ltr\"><em>x + 1694 = 1879<\/em><\/p>\n<p dir=\"ltr\"><em>x = 1879 &#8211; 1694<\/em><\/p>\n<p dir=\"ltr\"><em>x = 185<\/em><\/p>\n<p dir=\"ltr\"><em>B) X: 7 x 18 = 5839 + 8591<\/em><\/p>\n<p dir=\"ltr\"><em>X: 126 = 14430<\/em><\/p>\n<p dir=\"ltr\"><em>x = 14430 x 126<\/em><\/p>\n<p dir=\"ltr\"><em>x = 1818180<\/em><\/p>\n<h3 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Mau_4_Ben_trai_la_1_bieu_thuc_chua_dau_ngoac_don_co_2_tinh_toan_Phia_ben_phai_la_1_so\"><\/span>M\u1eabu 4. B\u00ean tr\u00e1i l\u00e0 1 bi\u1ec3u th\u1ee9c ch\u1ee9a d\u1ea5u ngo\u1eb7c \u0111\u01a1n, c\u00f3 2 t\u00ednh to\u00e1n. Ph\u00eda b\u00ean ph\u1ea3i l\u00e0 1 s\u1ed1.<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p dir=\"ltr\">Gi\u1ea3i ph\u00e1p: \u00c1p d\u1ee5ng c\u00e1c quy t\u1eafc \u0111\u1ec3 th\u1ef1c hi\u1ec7n t\u00ednh to\u00e1n, sau \u0111\u00f3 c\u1ea7n ph\u1ea3i t\u00ednh to\u00e1n gi\u00e1 tr\u1ecb c\u1ee7a c\u00e1c bi\u1ec3u th\u1ee9c b\u00ean ngo\u00e0i d\u1ea5u ngo\u1eb7c tr\u01b0\u1edbc khi \u0111\u1ebfn trong d\u1ea5u ngo\u1eb7c \u0111\u01a1n.<\/p>\n<p dir=\"ltr\"><em>V\u00ed d\u1ee5: T\u00ecm x bi\u1ebft<\/em><\/p>\n<p dir=\"ltr\"><em>a) (1747 + x): 5 = 2840<\/em><\/p>\n<p dir=\"ltr\"><em>b) (2478 &#8211; x) x 16 = 18496<\/em><\/p>\n<p dir=\"ltr\"><em>H\u01b0\u1edbng d\u1eabn gi\u1ea3i ph\u00e1p:<\/em><\/p>\n<p dir=\"ltr\"><em>a) (1747 + x): 5 = 2840<\/em><\/p>\n<p dir=\"ltr\"><em>1747 + x = 2840 x 5<\/em><\/p>\n<p dir=\"ltr\"><em>1747 + x = 14200<\/em><\/p>\n<p dir=\"ltr\"><em>x = 14200 &#8211; 1747<\/em><\/p>\n<p dir=\"ltr\"><em>x = 12453<\/em><\/p>\n<p dir=\"ltr\"><em>b) (2478 &#8211; x) x 16 = 18496<\/em><\/p>\n<p dir=\"ltr\"><em>2478 &#8211; x = 18496: 16<\/em><\/p>\n<p dir=\"ltr\"><em>2478 &#8211; x = 1156<\/em><\/p>\n<p dir=\"ltr\"><em>x = 2478 &#8211; 1156<\/em><\/p>\n<p dir=\"ltr\"><em>x = 1322<\/em><\/p>\n<h3 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Mau_5_Ben_trai_la_mot_bieu_thuc_chua_dau_ngoac_don_voi_2_tinh_toan_Phia_ben_phai_la_tong_so_hieu_qua_va_san_pham\"><\/span>M\u1eabu 5. B\u00ean tr\u00e1i l\u00e0 m\u1ed9t bi\u1ec3u th\u1ee9c ch\u1ee9a d\u1ea5u ngo\u1eb7c \u0111\u01a1n, v\u1edbi 2 t\u00ednh to\u00e1n. Ph\u00eda b\u00ean ph\u1ea3i l\u00e0 t\u1ed5ng s\u1ed1, hi\u1ec7u qu\u1ea3 v\u00e0 s\u1ea3n ph\u1ea9m.<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p dir=\"ltr\">Ph\u01b0\u01a1ng ph\u00e1p gi\u1ea3i ph\u00e1p: Ch\u00fang ph\u1ea3i t\u00ednh to\u00e1n gi\u00e1 tr\u1ecb c\u1ee7a bi\u1ec3u th\u1ee9c \u1edf ph\u00eda b\u00ean ph\u1ea3i, v\u00e0 sau \u0111\u00f3 l\u00e0 b\u00ean tr\u00e1i. L\u01b0u \u00fd, \u1edf ph\u00eda b\u00ean tr\u00e1i, c\u1ea7n ph\u1ea3i th\u1ef1c hi\u1ec7n d\u1ea5u ngo\u1eb7c b\u00ean ngo\u00e0i tr\u01b0\u1edbc v\u00e0 sau \u0111\u00f3.<\/p>\n<p dir=\"ltr\"><em>V\u00ed d\u1ee5: T\u00ecm x bi\u1ebft<\/em><\/p>\n<p dir=\"ltr\"><em>a) (x + 2859) x 2 = 5830 x 2<\/em><\/p>\n<p dir=\"ltr\"><em>B) (X &#8211; 4737): 3 = 5738 &#8211; 943<\/em><\/p>\n<p dir=\"ltr\"><em>H\u01b0\u1edbng d\u1eabn gi\u1ea3i ph\u00e1p:<\/em><\/p>\n<p dir=\"ltr\"><em>a) (x + 2859) x 2 = 5830 x 2<\/em><\/p>\n<p dir=\"ltr\"><em>x + 2859 = 5830<\/em><\/p>\n<p dir=\"ltr\"><em>x = 5830 &#8211; 2859 <\/em><\/p>\n<p dir=\"ltr\"><em>x = 2971<\/em><\/p>\n<p dir=\"ltr\"><em>B) (X &#8211; 4737): 3 = 5738 &#8211; 943<\/em><\/p>\n<p dir=\"ltr\"><em>(x &#8211; 4737): 3 = 4795<\/em><\/p>\n<p dir=\"ltr\"><em>X &#8211; 4737 = 4795 x 3<\/em><\/p>\n<p dir=\"ltr\"><em>X &#8211; 4737 = 14385<\/em><\/p>\n<p dir=\"ltr\"><em>x = 14385 + 4737<\/em><\/p>\n<p dir=\"ltr\"><em>x = 19122<\/em><\/p>\n<h2 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Kien_thuc_can_nho_khi_giai_toan_lop_4_tim_thay_x\"><\/span>Ki\u1ebfn th\u1ee9c c\u1ea7n nh\u1edb khi gi\u1ea3i to\u00e1n l\u1edbp 4 t\u00ecm th\u1ea5y x<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p dir=\"ltr\">\u0110\u1ec3 c\u00f3 th\u1ec3 gi\u1ea3i quy\u1ebft b\u00e0i t\u1eadp \u0111\u1ec3 t\u00ecm l\u1edbp 4, b\u1ea1n c\u1ea7n nh\u1edb c\u00f4ng th\u1ee9c v\u00e0 quy t\u1eafc \u0111\u1ec3 th\u1ef1c hi\u1ec7n c\u00e1c t\u00ednh to\u00e1n nh\u01b0 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\/toan-lop-4-tim-x-2.jpg\" alt=\"Khi gi\u1ea3i to\u00e1n, X n\u00ean hi\u1ec3u c\u00f4ng th\u1ee9c v\u00e0 quy t\u1eafc. (\u1ea2nh: B\u1ed9 s\u01b0u t\u1eadp Internet)\" width=\"100%\"><\/p>\n<p dir=\"ltr\">C\u00f4ng th\u1ee9c trong t\u00ednh to\u00e1n t\u00ecm ki\u1ebfm x<\/p>\n<ul>\n<li dir=\"ltr\">B\u1ed5 sung: term + term = sum<\/li>\n<li dir=\"ltr\">Ph\u00e9p tr\u1eeb: S\u1ed1 l\u01b0\u1ee3ng c\u00e1c kho\u1ea3n kh\u1ea5u tr\u1eeb &#8211; tr\u1eeb s\u1ed1 = ch\u00eanh l\u1ec7ch<\/li>\n<li dir=\"ltr\">Ph\u00e2n chia: S\u1ed1 ph\u00e2n chia: chia s\u1ed1 chia = ch\u1ea5n th\u01b0\u01a1ng<\/li>\n<li dir=\"ltr\">Ph\u00e9p nh\u00e2n: y\u1ebfu t\u1ed1 ph\u1ee5 x s\u1ed1 = \u00e2m l\u01b0\u1ee3ng<\/li>\n<\/ul>\n<p dir=\"ltr\">Quy t\u1eafc th\u1ef1c hi\u1ec7n t\u00ednh to\u00e1n x<\/p>\n<ul>\n<li dir=\"ltr\">Th\u1ef1c hi\u1ec7n b\u1ed9 ph\u1eadn \u0111\u1ea7u ti\u00ean, b\u1ed5 sung b\u1ed5 sung.<\/li>\n<li dir=\"ltr\">\u0110\u1ed1i v\u1edbi c\u00e1c bi\u1ec3u th\u1ee9c ch\u1ec9 nh\u00e2n v\u00e0 chia, h\u00e3y l\u00e0m theo th\u1ee9 t\u1ef1 t\u1eeb tr\u00e1i sang ph\u1ea3i.<\/li>\n<\/ul>\n<h2 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Bi_quyet_hoc_tap_va_ghi_nho_kien_%E2%80%8B%E2%80%8Bthuc_toan_hoc_lop_4_de_tim_X_mot_cach_hieu_qua\"><\/span>B\u00ed quy\u1ebft h\u1ecdc t\u1eadp v\u00e0 ghi nh\u1edb ki\u1ebfn \u200b\u200bth\u1ee9c to\u00e1n h\u1ecdc l\u1edbp 4 \u0111\u1ec3 t\u00ecm X m\u1ed9t c\u00e1ch hi\u1ec7u qu\u1ea3<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p dir=\"ltr\">\u0110\u1ec3 gi\u00fap h\u1ecd hi\u1ec3u, h\u1ecdc v\u00e0 chinh ph\u1ee5c c\u00e1c b\u00e0i t\u1eadp \u0111\u1ec3 t\u00ecm X Math 4, \u0111\u00e2y l\u00e0 m\u1ed9t s\u1ed1 b\u00ed m\u1eadt 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\/toan-lop-4-tim-x-3.jpg\" alt=\"Cha m\u1eb9 n\u00ean t\u1ea1o \u0111i\u1ec1u ki\u1ec7n cho con c\u00e1i h\u1ecd th\u1ef1c h\u00e0nh th\u01b0\u1eddng xuy\u00ean. (\u1ea2nh: B\u1ed9 s\u01b0u t\u1eadp Internet)\" width=\"100%\"><\/p>\n<ul>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">Bi\u1ebft l\u00fd thuy\u1ebft v\u1ec1 c\u00e1c b\u00e0i t\u1eadp \u0111\u1ec3 t\u00ecm X: \u0110\u1ed1i v\u1edbi lo\u1ea1i b\u00e0i t\u1eadp n\u00e0y, h\u1ecd ch\u1ec9 c\u1ea7n hi\u1ec3u c\u00f4ng th\u1ee9c v\u00e0 quy t\u1eafc \u0111\u1ec3 th\u1ef1c hi\u1ec7n ph\u00e2n t\u00edch tr\u00ean, ch\u1eafc ch\u1eafn s\u1ebd th\u1ef1c hi\u1ec7n b\u00e0i t\u1eadp.<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">Th\u1ef1c h\u00e0nh th\u01b0\u1eddng xuy\u00ean: Sau khi b\u1ea1n n\u1eafm b\u1eaft \u0111\u01b0\u1ee3c l\u00fd thuy\u1ebft, ph\u1ee5 huynh khuy\u1ebfn kh\u00edch v\u00e0 y\u00eau c\u1ea7u tr\u1ebb th\u1ef1c h\u00e0nh, th\u1ef1c h\u00e0nh nhi\u1ec1u h\u01a1n nh\u01b0 l\u00e0m b\u00e0i t\u1eadp v\u1ec1 nh\u00e0 \u0111\u01b0\u1ee3c giao trong l\u1edbp, b\u00e0i t\u1eadp trong s\u00e1ch gi\u00e1o khoa, b\u00e0i t\u1eadp, h\u1ecdc th\u00eam ki\u1ebfn \u200b\u200bth\u1ee9c m\u1edbi tr\u00ean internet, th\u1eed nghi\u1ec7m, &#8230; t\u1eeb \u0111\u00f3 gi\u00fap tr\u1ebb th\u1ef1c s\u1ef1 hi\u1ec3u b\u1ea3n ch\u1ea5t c\u1ee7a b\u00e0i t\u1eadp n\u00e0y.<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">X\u00e2y d\u1ef1ng ni\u1ec1m \u0111am m\u00ea, th\u00edch h\u1ecdc to\u00e1n v\u1edbi to\u00e1n h\u1ecdc kh\u1ec9: \u0110\u00e2y l\u00e0 m\u1ed9t \u1ee9ng d\u1ee5ng gi\u1ea3ng d\u1ea1y song ng\u1eef tr\u1ef1c tuy\u1ebfn cho tr\u1ebb m\u1eabu gi\u00e1o v\u00e0 ti\u1ec3u h\u1ecdc. V\u1edbi n\u1ed9i dung gi\u1ea3ng d\u1ea1y th\u00f4ng qua nhi\u1ec1u ph\u01b0\u01a1ng ph\u00e1p gi\u1ea3ng d\u1ea1y t\u00edch c\u1ef1c, c\u00e1c b\u00e0i h\u1ecdc c\u00e1 nh\u00e2n h\u00f3a cho t\u1eebng \u0111\u1ed1i t\u01b0\u1ee3ng, cung c\u1ea5p nhi\u1ec1u t\u00ednh n\u0103ng h\u1ed7 tr\u1ee3 h\u1ecdc t\u1eadp v\u00e0 gi\u00fap ph\u1ee5 huynh gi\u00e1m s\u00e1t v\u00e0 quan s\u00e1t l\u1ed9 tr\u00ecnh h\u1ecdc t\u1eadp r\u00f5 r\u00e0ng. H\u00e3y ch\u1eafc ch\u1eafn r\u1eb1ng Shining Home &#8211; Gia \u0111\u00ecnh Anh Ng\u1eef Math s\u1ebd c\u1ea3i thi\u1ec7n kh\u1ea3 n\u0103ng to\u00e1n h\u1ecdc c\u1ee7a em b\u00e9 ch\u1ec9 v\u1edbi 2000 VND\/ng\u00e0y. Ph\u1ee5 huynh c\u00f3 th\u1ec3 t\u00ecm hi\u1ec3u th\u00eam v\u1ec1 \u1ee9ng d\u1ee5ng th\u00f4ng qua video sau ho\u1eb7c \u0111\u0103ng k\u00fd t\u01b0 v\u1ea5n mi\u1ec5n ph\u00ed:<\/p>\n<\/li>\n<\/ul>\n<p dir=\"ltr\"> <img loading=\"lazy\" decoding=\"async\" style=\"margin-left: auto;margin-right: auto\" class=\"lazyload\" src=\"https:\/\/external-content.duckduckgo.com\/iu\/?u=https:\/\/vnmedia.monkeyuni.net\/upload\/web\/img\/button_dang-ky-ngay-1.png\" alt=\"\" width=\"200\" height=\"27\"><\/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<h2 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Mot_so_bai_tap_de_tim_X_biet_lop_4_de_tre_thuc_hanh\"><\/span>M\u1ed9t s\u1ed1 b\u00e0i t\u1eadp \u0111\u1ec3 t\u00ecm X bi\u1ebft l\u1edbp 4 \u0111\u1ec3 tr\u1ebb th\u1ef1c h\u00e0nh<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p dir=\"ltr\">Sau khi b\u1ea1n \u0111\u00e3 n\u1eafm b\u1eaft \u0111\u01b0\u1ee3c ki\u1ebfn \u200b\u200bth\u1ee9c tr\u00ean, \u0111\u00e2y l\u00e0 m\u1ed9t s\u1ed1 b\u00e0i t\u1eadp to\u00e1n l\u1edbp 4 \u0111\u1ec3 t\u00ecm X t\u1eeb c\u01a1 b\u1ea3n \u0111\u1ebfn n\u00e2ng cao \u0111\u1ec3 tr\u1ebb th\u1ef1c h\u00e0nh c\u00f9ng nhau:<\/p>\n<p dir=\"ltr\">B\u00e0i 1. T\u00ecm x bi\u1ebft<\/p>\n<p dir=\"ltr\">A) X: 30 = 853<\/p>\n<p dir=\"ltr\">b) 753 &#8211; x = 401<\/p>\n<p dir=\"ltr\">c) 4621 + x = 7539<\/p>\n<p dir=\"ltr\">D) 742 xx = 11130<\/p>\n<p dir=\"ltr\">B\u00e0i 2. T\u00ecm x bi\u1ebft:<\/p>\n<p dir=\"ltr\">a) (x + 208) x 127 = 31115          <\/p>\n<p dir=\"ltr\">b) (x + 5217): 115 = 308<\/p>\n<p dir=\"ltr\">C) (x &#8211; 3048): 145 = 236              <\/p>\n<p dir=\"ltr\">D) (4043 &#8211; x) x 84 = 28224<\/p>\n<p dir=\"ltr\">B\u00e0i 3. T\u00ecm x bi\u1ebft<\/p>\n<p dir=\"ltr\">A) X + 6034 = 13478 + 6782           <\/p>\n<p dir=\"ltr\">b) 2054 + x = 9725 &#8211; 1279<\/p>\n<p dir=\"ltr\">C) X &#8211; 33254 = 237 x 145                <\/p>\n<p dir=\"ltr\">D) 1240 &#8211; x = 44658: 54<\/p>\n<p dir=\"ltr\">B\u00e0i h\u1ecdc 4. T\u00ecm x bi\u1ebft<\/p>\n<p dir=\"ltr\">a) 12915: x + 3297 = 3502            <\/p>\n<p dir=\"ltr\">b) 17556: x &#8211; 478 = 149<\/p>\n<p dir=\"ltr\">c) 15892: XX 96 = 5568               <\/p>\n<p dir=\"ltr\">D) 117504: x: 72 = 48<\/p>\n<p dir=\"ltr\">B\u00e0i 5. T\u00ecm x bi\u1ebft<\/p>\n<p dir=\"ltr\">A) X + 4375 x 4 = 59930 &#8211; 9583<\/p>\n<p dir=\"ltr\">B) X: 8 x 19 = 281 + 129<\/p>\n<p dir=\"ltr\">C) X &#8211; 7308: 12 = 593 x 3<\/p>\n<p dir=\"ltr\">D) 4036 + 824: x = 72036: 3<\/p>\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\">Tr\u00ean \u0111\u00e2y l\u00e0 m\u1ed9t b\u1ea3n t\u00f3m t\u1eaft ki\u1ebfn \u200b\u200bth\u1ee9c v\u1ec1 c\u00e1c b\u00e0i t\u1eadp to\u00e1n l\u1edbp 4 \u0111\u1ec3 t\u00ecm x. Nh\u00ecn chung, \u0111i\u1ec1u n\u00e0y kh\u00f4ng qu\u00e1 kh\u00f3, nh\u01b0ng n\u00f3 kh\u00f4ng qu\u00e1 d\u1ec5 d\u00e0ng. Do \u0111\u00f3, cha m\u1eb9 c\u00f3 th\u1ec3 h\u01b0\u1edbng d\u1eabn em b\u00e9 d\u1ef1a tr\u00ean vi\u1ec7c chia s\u1ebb kh\u1ec9 tr\u00ean, \u0111\u1ea3m b\u1ea3o r\u1eb1ng n\u00f3 s\u1ebd gi\u00fap tr\u1ebb chinh ph\u1ee5c h\u00ecnh th\u1ee9c n\u00e0y m\u1ed9t c\u00e1ch d\u1ec5 d\u00e0ng.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>To\u00e1n h\u1ecdc l\u1edbp 4 T\u00ecm X l\u00e0 m\u1ed9t trong nh\u1eefng lo\u1ea1i b\u00e0i t\u1eadp m\u00e0 h\u1ecd s\u1ebd h\u1ecdc, l\u00e0m quen v\u00e0 \u0111\u1eb7c bi\u1ec7t ch\u00fang xu\u1ea5t hi\u1ec7n ph\u1ed5 bi\u1ebfn trong c\u00e1c c\u00e2u h\u1ecfi thi. V\u00ec v\u1eady, \u0111\u1ec3 gi\u00fap b\u00e9 d\u1ec5 d\u00e0ng chinh ph\u1ee5c lo\u1ea1i to\u00e1n h\u1ecdc n\u00e0y, h\u00e3y t\u00ecm ra c\u00e1c lo\u1ea1i b\u00e0i t\u1eadp v\u00e0 c\u00e1ch gi\u1ea3i&#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-14983","post","type-post","status-publish","format-standard","hentry","category-kien-thuc"],"_links":{"self":[{"href":"https:\/\/www.ckconitsha.com\/vn\/wp-json\/wp\/v2\/posts\/14983","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=14983"}],"version-history":[{"count":1,"href":"https:\/\/www.ckconitsha.com\/vn\/wp-json\/wp\/v2\/posts\/14983\/revisions"}],"predecessor-version":[{"id":18003,"href":"https:\/\/www.ckconitsha.com\/vn\/wp-json\/wp\/v2\/posts\/14983\/revisions\/18003"}],"wp:attachment":[{"href":"https:\/\/www.ckconitsha.com\/vn\/wp-json\/wp\/v2\/media?parent=14983"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.ckconitsha.com\/vn\/wp-json\/wp\/v2\/categories?post=14983"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.ckconitsha.com\/vn\/wp-json\/wp\/v2\/tags?post=14983"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}