{"id":1106,"date":"2026-01-12T12:23:57","date_gmt":"2026-01-12T05:23:57","guid":{"rendered":"https:\/\/tamsudoisong.com.vn\/?p=1106"},"modified":"2026-01-12T12:23:57","modified_gmt":"2026-01-12T05:23:57","slug":"me-viet-thac-mac-vi-con-lam-toan-63-9-bi-co-gach-sai-len-mang-hoi-thi-tam-phuc-vi-loi-giai","status":"publish","type":"post","link":"https:\/\/tamsudoisong.com.vn\/index.php\/2026\/01\/12\/me-viet-thac-mac-vi-con-lam-toan-63-9-bi-co-gach-sai-len-mang-hoi-thi-tam-phuc-vi-loi-giai\/","title":{"rendered":"M\u1eb9 Vi\u1ec7t th\u1eafc m\u1eafc v\u00ec con l\u00e0m to\u00e1n \u201c6+3 = 9\u201d b\u1ecb c\u00f4 g\u1ea1ch sai, l\u00ean m\u1ea1ng h\u1ecfi th\u00ec t\u00e2m ph\u1ee5c v\u00ec l\u1eddi gi\u1ea3i"},"content":{"rendered":"

To\u00e1n h\u1ecdc \u1edf b\u1eadc ti\u1ec3u h\u1ecdc kh\u00f4ng ch\u1ec9 d\u1eebng l\u1ea1i \u1edf vi\u1ec7c l\u00e0m quen v\u1edbi c\u00e1c con s\u1ed1 hay ph\u00e9p t\u00ednh c\u1ed9ng tr\u1eeb \u0111\u01a1n gi\u1ea3n, m\u00e0 c\u00f2n l\u00e0 n\u1ec1n t\u1ea3ng quan tr\u1ecdng \u0111\u1ec3 r\u00e8n luy\u1ec7n t\u01b0 duy suy lu\u1eadn cho h\u1ecdc sinh.<\/p>\n

Th\u00f4ng qua vi\u1ec7c ph\u00e2n t\u00edch \u0111\u1ec1 b\u00e0i, t\u00ecm m\u1ed1i quan h\u1ec7 gi\u1eefa c\u00e1c d\u1eef ki\u1ec7n v\u00e0 suy ngh\u0129 t\u1eebng b\u01b0\u1edbc \u0111\u1ec3 \u0111i \u0111\u1ebfn l\u1eddi gi\u1ea3i, tr\u1ebb d\u1ea7n h\u00ecnh th\u00e0nh kh\u1ea3 n\u0103ng logic, bi\u1ebft \u0111\u1eb7t c\u00e2u h\u1ecfi \u201cv\u00ec sao\u201d v\u00e0 \u201cnh\u01b0 th\u1ebf n\u00e0o\u201d, t\u1eeb \u0111\u00f3 ph\u00e1t tri\u1ec3n t\u01b0 duy \u0111\u1ed9c l\u1eadp v\u00e0 k\u1ef9 n\u0103ng gi\u1ea3i quy\u1ebft v\u1ea5n \u0111\u1ec1 ngay t\u1eeb nh\u1eefng n\u0103m \u0111\u1ea7u \u0111\u1ebfn tr\u01b0\u1eddng.<\/p>\n

Gi\u1ed1ng nh\u01b0 c\u00e2u chuy\u1ec7n c\u1ee7a m\u1ed9t b\u00e0 m\u1eb9 Vi\u1ec7t d\u01b0\u1edbi \u0111\u00e2y m\u1edf ra r\u1ea5t nhi\u1ec1u b\u00e0i h\u1ecdc c\u1ee7a c\u1ea3 cha m\u1eb9 l\u1eabn h\u1ecdc sinh.<\/p>\n

B\u00e0i ki\u1ec3m tra to\u00e1n c\u1ee7a h\u1ecdc sinh l\u1edbp 1 khi\u1ebfn m\u1eb9 th\u1eafc m\u1eafc.<\/p>\n

Theo chia s\u1ebb t\u1eeb m\u1ed9t b\u00e0 m\u1eb9 c\u00f3 t\u00e0i kho\u1ea3n m\u1ea1ng x\u00e3 h\u1ed9i T\u00e2m Nguy\u1ec5n, con g\u00e1i c\u00f4 mang v\u1ec1 nh\u00e0 m\u1ed9t b\u00e0i ki\u1ec3m tra to\u00e1n b\u1ecb c\u00f4 gi\u00e1o ch\u1ea5m \u201cSai\u201d 2 ph\u00e9p t\u00ednh nh\u01b0ng b\u00e0 m\u1eb9 soi \u0111i soi l\u1ea1i v\u1eabn kh\u00f4ng th\u1ec3 hi\u1ec3u con \u0111\u00e3 l\u00e0m sai \u1edf \u0111\u00e2u v\u00e0 ph\u1ea3i l\u00e0m nh\u01b0 th\u1ebf n\u00e0o m\u1edbi \u0111\u00fang?<\/p>\n

Kh\u00f4ng th\u1ec3 t\u00ecm ra l\u1eddi gi\u1ea3i, ng\u01b0\u1eddi m\u1eb9 quy\u1ebft \u0111\u1ecbnh chia s\u1ebb l\u00ean m\u1ea1ng x\u00e3 h\u1ed9i v\u00e0 \u201cc\u1ea7u c\u1ee9u\u201d d\u00e2n m\u1ea1ng.<\/p>\n

Theo \u0111\u00f3, b\u00e0i to\u00e1n \u0111\u01b0a ra hai b\u1ee9c tranh kh\u00e1c nhau, m\u1ed9t b\u1ee9c tranh v\u1ebd\u00a0nh\u1eefng qu\u1ea3 tr\u1ee9ng v\u00e0 m\u1ed9t b\u1ee9c tranh v\u1ebd\u00a0nh\u1eefng qu\u1ea3 t\u00e1o. Y\u00eau c\u1ea7u \u0111\u01b0a ra l\u00e0 h\u1ecdc sinh h\u00e3y vi\u1ebft ph\u00e9p t\u00ednh th\u00edch h\u1ee3p.<\/p>\n

Ngay l\u1eadp t\u1ee9c, em h\u1ecdc sinh \u0111\u00e3 c\u00f3 2 ph\u00e9p t\u00ednh c\u1ed9ng l\u00e0 6 + 3 = 9 v\u00e0 8 + 2 = 10.<\/p>\n

\"Ng\u01b0\u1eddi<\/p>\n

Ng\u01b0\u1eddi m\u1eb9 l\u00ean m\u1ea1ng h\u1ecfi c\u00e1ch l\u00e0m \u0111\u00fang.<\/p>\n

Tuy nhi\u00ean, m\u1ecdi vi\u1ec7c kh\u00f4ng ch\u1ec9 \u0111\u01a1n gi\u1ea3n nh\u01b0 th\u1ebf b\u1edfi c\u00f4 gi\u00e1o \u0111\u00e3 ch\u1ea5m \u201cSai\u201d d\u01b0\u1edbi 2 ph\u00e9p t\u00ednh n\u00e0y.<\/p>\n

C\u0169ng gi\u1ed1ng nh\u01b0 ng\u01b0\u1eddi m\u1eb9, r\u1ea5t nhi\u1ec1u ph\u1ee5 huynh kh\u00e1c \u0111\u1ec1u kh\u00f4ng th\u1ec3 hi\u1ec3u em h\u1ecdc sinh \u0111\u00e3 l\u00e0m sai \u1edf \u0111\u00e2u v\u00e0 h\u1ecd c\u0169ng kh\u00f4ng cho ra \u0111\u01b0\u1ee3c ph\u00e9p t\u00ednh \u0111\u00fang ph\u1ea3i l\u00e0 nh\u01b0 th\u1ebf n\u00e0o.<\/p>\n

\u2013 Con t\u00f4i \u0111ang h\u1ecdc l\u1edbp 1. Ph\u1ea3i n\u00f3i th\u1eadt l\u00e0 ch\u01b0\u01a1ng tr\u00ecnh To\u00e1n b\u00e2y gi\u1edd kh\u00f3 qu\u00e1. Kh\u00f4ng ph\u1ea3i t\u00f4i gi\u1ea5u d\u1ed1t, ch\u1ed3ng t\u00f4i h\u1ecdc To\u00e1n kh\u00e1 gi\u1ecfi m\u00e0 c\u00f3 nh\u1eefng b\u00e0i c\u00f2n ph\u1ea3i b\u00f3 tay.<\/em><\/p>\n

\u2013 Nhi\u1ec1u l\u00fac t\u00f4i ngh\u0129 hay l\u00e0 m\u00ecnh n\u00ean \u0111i h\u1ecdc l\u1ea1i l\u1edbp 1. C\u00f3 nh\u1eefng b\u00e0i t\u00f4i ph\u1ea3i suy ngh\u0129 r\u1ea5t l\u00e2u m\u1edbi ra, th\u00ec kh\u00f4ng hi\u1ec3u c\u00e1c con l\u00e0m sao c\u00f3 th\u1ec3 hi\u1ec3u \u0111\u01b0\u1ee3c.<\/em><\/p>\n

\u2013 N\u1ebfu kh\u00f4ng \u0111\u1ecdc b\u00ecnh lu\u1eadn c\u1ee7a m\u1ecdi ng\u01b0\u1eddi, c\u00f3 khi t\u00f4i c\u0169ng kh\u00f4ng bi\u1ebft m\u00ecnh sai \u1edf \u0111\u00e2u v\u00e0 ph\u1ea3i l\u00e0m th\u1ebf n\u00e0o cho \u0111\u00fang.<\/em><\/p>\n

Tuy v\u1eady, c\u0169ng c\u00f3 m\u1ed9t s\u1ed1 ph\u1ee5 huynh kh\u00e1c \u0111\u01b0a ra l\u1eddi gi\u1ea3i kh\u00e1 h\u1ee3p l\u00fd cho b\u00e0i to\u00e1n n\u00e0y.<\/p>\n

\"M\u1eb9<\/p>\n

\"M\u1eb9<\/p>\n

Tuy nhi\u00ean, kh\u00f4ng \u00edt cha m\u1eb9 cho r\u1eb1ng d\u1ea1ng b\u00e0i nh\u01b0 v\u1eady gi\u00fap r\u00e8n luy\u1ec7n t\u01b0 duy cho h\u1ecdc sinh, nh\u01b0ng c\u00e1ch ch\u1ea5m b\u00e0i c\u1ee7a c\u00f4 gi\u00e1o l\u1ea1i c\u00f3 ph\u1ea7n qu\u00e1 g\u00f2 b\u00f3.<\/p>\n

\u2013 R\u00e8n t\u01b0 duy nh\u01b0ng l\u1ea1i g\u00f2 b\u00f3 th\u00ec r\u1ea5t kh\u00f3 ch\u1ea5p nh\u1eadn. \u0110\u00e3 l\u00e0 To\u00e1n t\u01b0 duy th\u00ec n\u00ean cho h\u1ecdc sinh \u0111\u01b0\u1ee3c gi\u1ea3i th\u00edch c\u00e1ch l\u00e0m c\u1ee7a m\u00ecnh. N\u1ebfu c\u00e1ch gi\u1ea3i h\u1ee3p l\u00fd th\u00ec v\u1eabn n\u00ean cho \u0111i\u1ec3m, nh\u01b0 v\u1eady m\u1edbi th\u1ef1c s\u1ef1 khuy\u1ebfn kh\u00edch t\u01b0 duy. T\u1ea1i sao l\u1ea1i \u00e9p bu\u1ed9c tr\u1ebb ph\u1ea3i suy ngh\u0129 theo \u0111\u00fang \u00fd c\u1ee7a ng\u01b0\u1eddi ra \u0111\u1ec1, trong khi r\u1ea5t nhi\u1ec1u h\u00ecnh v\u1ebd ngay c\u1ea3 ng\u01b0\u1eddi l\u1edbn c\u0169ng kh\u00f4ng bi\u1ebft n\u00ean l\u00e0m ph\u00e9p c\u1ed9ng hay ph\u00e9p tr\u1eeb.<\/em><\/p>\n

\u2013 To\u00e1n t\u01b0 duy th\u00ec n\u00ean \u0111\u1ec3 tr\u1ebb \u0111\u01b0\u1ee3c tho\u1ea3i m\u00e1i suy ngh\u0129, mi\u1ec5n l\u00e0 k\u1ebft qu\u1ea3 \u0111\u00fang. \u0110\u00e2y l\u1ea1i l\u00e0 ki\u1ec3u t\u01b0 duy c\u00f3 khu\u00f4n m\u1eabu, bu\u1ed9c tr\u1ebb ph\u1ea3i t\u01b0 duy theo \u0111\u00fang c\u00e1ch c\u1ee7a ng\u01b0\u1eddi kh\u00e1c m\u1edbi \u0111\u01b0\u1ee3c coi l\u00e0 \u0111\u00fang. Ch\u01b0a k\u1ec3 nhi\u1ec1u b\u00e0i t\u1eadp ch\u1ec9 l\u00e0 b\u1ea3n photocopy tr\u1eafng \u0111en, h\u00ecnh \u1ea3nh m\u1edd nh\u1ea1t, c\u00f3 h\u00f4m nh\u00ecn r\u1ea5t m\u1ecfi m\u1eaft.<\/em><\/p>\n

\u2013 V\u1edbi nh\u1eefng d\u1ea1ng b\u00e0i nh\u01b0 th\u1ebf n\u00e0y, nhi\u1ec1u khi c\u00f4 gi\u00e1o ch\u1ec9 d\u1ea1y h\u1ecdc sinh l\u00e0m ph\u00e9p c\u1ed9ng ho\u1eb7c ph\u00e9p tr\u1eeb. Nh\u01b0ng theo t\u00f4i, cha m\u1eb9 n\u00ean d\u1ea1y con theo b\u1ea3n ch\u1ea5t c\u1ee7a v\u1ea5n \u0111\u1ec1. V\u00ed d\u1ee5, n\u00f3i v\u1edbi con r\u1eb1ng: \u0111\u00e2y l\u00e0 c\u00e1c qu\u1ea3 tr\u1ee9ng, nh\u01b0ng c\u00f3 ba b\u1ea1n \u0111\u00e3 chui ra kh\u1ecfi v\u1ecf r\u1ed3i, nh\u01b0 v\u1eady l\u00e0 \u0111i ra, l\u00e0 \u00edt \u0111i, th\u00ec con l\u00e0m ph\u00e9p tr\u1eeb. Ho\u1eb7c c\u00f3 hai qu\u1ea3 t\u00e1o kh\u00f4ng c\u00f2n xu\u1ea5t hi\u1ec7n n\u1eefa, v\u00ec \u0111\u00f3 l\u00e0 nh\u1eefng qu\u1ea3 t\u00e1o ngon \u0111\u00e3 \u0111\u01b0\u1ee3c ch\u1ecdn \u0111\u1ec3 \u0103n, m\u00e0 \u0103n m\u1ea5t \u0111i th\u00ec ph\u1ea3i tr\u1eeb b\u1edbt.<\/em><\/p>\n

\u2013 D\u1ea1y nh\u01b0 v\u1eady, sau n\u00e0y con s\u1ebd h\u1ecdc b\u1eb1ng s\u1ef1 hi\u1ec3u bi\u1ebft, ch\u1ee9 kh\u00f4ng ch\u1ec9 h\u1ecdc thu\u1ed9c c\u00f4ng th\u1ee9c.<\/em><\/p>\n","protected":false},"excerpt":{"rendered":"

To\u00e1n h\u1ecdc \u1edf b\u1eadc ti\u1ec3u h\u1ecdc kh\u00f4ng ch\u1ec9 d\u1eebng l\u1ea1i \u1edf vi\u1ec7c l\u00e0m quen v\u1edbi c\u00e1c con s\u1ed1 hay ph\u00e9p t\u00ednh c\u1ed9ng tr\u1eeb \u0111\u01a1n gi\u1ea3n, m\u00e0 c\u00f2n l\u00e0 n\u1ec1n t\u1ea3ng quan tr\u1ecdng \u0111\u1ec3 r\u00e8n luy\u1ec7n t\u01b0 duy suy lu\u1eadn cho h\u1ecdc sinh. Th\u00f4ng qua vi\u1ec7c ph\u00e2n t\u00edch \u0111\u1ec1 b\u00e0i, t\u00ecm m\u1ed1i quan h\u1ec7 gi\u1eefa c\u00e1c […]<\/p>\n","protected":false},"author":1,"featured_media":1107,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-1106","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-chua-phan-loai"],"_links":{"self":[{"href":"https:\/\/tamsudoisong.com.vn\/index.php\/wp-json\/wp\/v2\/posts\/1106","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/tamsudoisong.com.vn\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/tamsudoisong.com.vn\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/tamsudoisong.com.vn\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/tamsudoisong.com.vn\/index.php\/wp-json\/wp\/v2\/comments?post=1106"}],"version-history":[{"count":1,"href":"https:\/\/tamsudoisong.com.vn\/index.php\/wp-json\/wp\/v2\/posts\/1106\/revisions"}],"predecessor-version":[{"id":1108,"href":"https:\/\/tamsudoisong.com.vn\/index.php\/wp-json\/wp\/v2\/posts\/1106\/revisions\/1108"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/tamsudoisong.com.vn\/index.php\/wp-json\/wp\/v2\/media\/1107"}],"wp:attachment":[{"href":"https:\/\/tamsudoisong.com.vn\/index.php\/wp-json\/wp\/v2\/media?parent=1106"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/tamsudoisong.com.vn\/index.php\/wp-json\/wp\/v2\/categories?post=1106"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/tamsudoisong.com.vn\/index.php\/wp-json\/wp\/v2\/tags?post=1106"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}