{"id":25558,"date":"2021-12-24T17:19:04","date_gmt":"2021-12-24T10:19:04","guid":{"rendered":"https:\/\/www.vietlearn.org\/post\/?p=25558"},"modified":"2021-12-24T17:19:05","modified_gmt":"2021-12-24T10:19:05","slug":"bai-so-24-do-vui-luyen-tri-thong-minh","status":"publish","type":"post","link":"https:\/\/www.vietlearn.org\/kien-thuc\/bai-so-24-do-vui-luyen-tri-thong-minh\/","title":{"rendered":"B\u00c0I S\u1ed0 24 – \u0110\u1ed1 vui luy\u1ec7n tr\u00ed th\u00f4ng minh"},"content":{"rendered":"

<\/a>C\u00c2U 1:<\/h3>\n

Cho h\u00ecnh v\u1ebd:<\/p>\n

\"46.jpg\"<\/p>\n

H\u00e3y cho bi\u1ebft tr\u00ean h\u00ecnh v\u1ebd c\u00f3 bao nhi\u00eau \u0111o\u1ea1n th\u1eb3ng? v\u00e0 t\u1ed5ng \u0111\u1ed9 d\u00e0i c\u1ee7a t\u1ea5t c\u1ea3 c\u00e1c \u0111o\u1ea1n th\u1eb3ng b\u1eb1ng bao nhi\u00eau?<\/p>\n

<\/a>C\u00c2U 2:<\/h3>\n

M\u1ed9t ng\u01b0\u1eddi b\u00e1n h\u00e0ng, do \u1ea5n t\u01b0\u1ee3ng sau khi xem v\u1edf k\u1ecbch c\u1ee7a Phaoxt\u01a1 \u1edf nh\u00e0 h\u00e1t, \u0111\u00e3 c\u00f3 m\u1ed9t gi\u1ea5c m\u01a1 trong khi ng\u1ee7 nh\u01b0 sau:<\/p>\n

\u201c\u2026 Ng\u01b0\u1eddi b\u00e1n h\u00e0ng \u0111\u1ee9ng sau qu\u1ea7y h\u00e0ng, tr\u00ean \u0111\u00f3 c\u00f3 th\u00f9ng ch\u00e8 kh\u00f4, m\u1ed9t c\u00e2n \u0111\u0129a v\u00e0 v\u00e0i t\u1edd gi\u1ea5y g\u00f3i to. Tuy\u1ec7t nhi\u00ean kh\u00f4ng c\u00f3 nh\u1eefng qu\u1ea3 c\u00e2n. \u201cL\u00e0m sao b\u00e2y gi\u1edd? – Ng\u01b0\u1eddi b\u00e1n h\u00e0ng ngh\u0129 – N\u1ebfu c\u00f3 kh\u00e1ch \u0111\u1ebfn mua ch\u00e8 h\u1eb3n l\u00e0 m\u00ecnh ph\u1ea3i tr\u00e1nh anh ta th\u00f4i!\u201d. C\u00f9ng l\u00fac \u0111\u00f3, m\u1ed9t g\u00e3 l\u00e1i t\u00e0u bi\u1ec3n xu\u1ea5t hi\u1ec7n, m\u1eb7c \u00e1o \u0111\u1ecf v\u1edbi m\u1ed9t chi\u1ebfc khuy c\u00e0i l\u1edbn.<\/p>\n

– H\u00e3y c\u00e2n cho ta m\u1ed9t c\u00e2n ch\u00e8 – G\u00e3 n\u00f3i m\u1ed9t c\u00e1ch d\u1ecda d\u1eabm.<\/p>\n

– \u1ed2\u2026 Ngay sau \u0111\u00e2y t\u00f4i s\u1ebd mang \u0111\u1ebfn cho \u00f4ng\u2026 H\u00f4m nay tr\u1eddi \u0111\u1eb9p qu\u00e1, kh\u00f4ng qu\u00e1 n\u00f3ng ph\u1ea3i kh\u00f4ng \u00f4ng?<\/p>\n

– \u0110\u1eebng c\u00f3 \u0111\u00e1nh tr\u1ed1ng l\u1ea3ng \u2013 G\u00e3 l\u00e1i t\u00e0u la m\u1eafng \u2013 H\u00e3y c\u00e2n ch\u00e8 mau \u0111i.<\/p>\n

– Xin \u00f4ng th\u1ee9 l\u1ed7i\u2026 ch\u1ec9 m\u1ed9t s\u01a1 su\u1ea5t\u2026 \u0111\u00e2y l\u00e0 l\u1ea7n \u0111\u1ea7u, nh\u1eefng qu\u1ea3 c\u00e2n c\u00f2n \u0111ang \u0111em th\u1eed l\u1ea1i.<\/p>\n

V\u00f4 l\u00fd, th\u1ebf \u0111\u0129a c\u00e2n th\u00ec sao? c\u00f3 b\u00ean n\u00e0o \u0111\u1ef1ng \u0111\u01b0\u1ee3c n\u01b0\u1edbc kh\u00f4ng? – G\u00e3 l\u00e1i t\u00e0u h\u1ecfi.<\/p>\n

– B\u00ean ph\u1ea3i ch\u1ee9a \u0111\u01b0\u1ee3c 500g n\u01b0\u1edbc, b\u00ean tr\u00e1i ho\u00e0n to\u00e0n b\u1eb1ng ph\u1eb3ng.<\/p>\n

– Th\u1ebf th\u00ec tuy\u1ec7t \u2013 V\u1eeba n\u00f3i g\u00e3 v\u1eeba l\u1ea5y ra m\u1ed9t chai n\u01b0\u1edbc \u2013 Tr\u1ecdng l\u01b0\u1ee3ng chai kh\u00f4ng bi\u1ebft, nh\u01b0ng n\u00f3 ch\u1ee9a \u0111\u00fang 300g n\u01b0\u1edbc. C\u00e1i khuy c\u00e0i n\u00e0y n\u1eb7ng 650g. L\u1ea5y chai n\u01b0\u1edbc v\u00e0 c\u00e1i khuy c\u00e0i m\u00e0 c\u00e2n s\u1ebd \u0111\u00fang 1 c\u00e2n ch\u00e8 kh\u00f4ng k\u1ec3 gi\u1ea5y g\u00f3i.<\/p>\n

– Th\u1ebf th\u00ec kh\u00f4ng \u0111\u01b0\u1ee3c \u2013 Ng\u01b0\u1eddi b\u00e1n h\u00e0ng k\u00eau l\u00ean.<\/p>\n

– To\u00e0n to\u00e0n c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c \u2013 G\u00e3 l\u00e1i t\u00e0u qu\u00e1t to b\u1ef1c t\u1ee9c, l\u00e0m ng\u01b0\u1eddi b\u00e1n h\u00e0ng b\u1eebng t\u1ec9nh gi\u1ea5c .<\/p>\n

Sau khi b\u00ecnh t\u0129nh suy ngh\u0129, ng\u01b0\u1eddi b\u00e1n h\u00e0ng th\u1ea5y g\u00e3 l\u00e1i t\u00e0u n\u00f3i \u0111\u00fang. V\u1eady c\u1ea7n ph\u1ea3i c\u00e2n th\u1ebf n\u00e0o?<\/p>\n

(B\u00e0i n\u00e0y c\u00f3 r\u1ea5t nhi\u1ec1u c\u00e1ch c\u00e2n).<\/p>\n

Ch\u00fa \u00fd: Kh\u00f4ng \u0111\u01b0\u1ee3c b\u1ecf chai ch\u1ee9a n\u01b0\u1edbc v\u00e0o c\u00e2n v\u00ec tr\u1ecdng l\u01b0\u1ee3ng chai kh\u00f4ng bi\u1ebft.<\/p>\n

<\/a>C\u00c2U 3:<\/h3>\n

C\u00e1c b\u1ea1n h\u00e3y gi\u1ea3i b\u00e0i to\u00e1n sau \u0111\u1ec3 t\u00ecm ra k\u1ebft qu\u1ea3 c\u1ee7a c\u00e1c ch\u1eef c\u00e1i, sau \u0111\u00f3 \u0111i\u1ec1n c\u00e1c ch\u1eef c\u00e1i v\u00e0o c\u00e1c \u00f4 t\u01b0\u01a1ng \u1ee9ng v\u1edbi \"48.jpg\" c\u00e1c s\u1ed1 v\u00e0 th\u00eam c\u00e1c d\u1ea5u c\u1ea7n thi\u1ebft, b\u1ea1n s\u1ebd \u0111\u01b0\u1ee3c l\u1eddi khuy\u00ean r\u1ea5t b\u1ed5 \u00edch \u0111\u1ea5y!<\/p>\n

<\/a>C\u00c2U 4:<\/h3>\n

Th\u1ee9 5 ng\u00e0y 8 – 12 l\u00fac 9h, h\u00f4m \u0111\u00f3 tr\u1eddi n\u1eafng, d\u1ef1 b\u00e1o trong v\u00f2ng 72h n\u1eefa tr\u1eddi v\u1eabn n\u1eafng \u1ea5m, v\u1eady ng\u00e0y 10 – 12, 21h c\u00f3 ch\u1eafc tr\u1eddi h\u00f4m \u0111\u00f3 n\u1eafng hay kh\u00f4ng?<\/p>\n

<\/a>C\u00c2U 5:<\/h3>\n

C\u00f3 hai ng\u01b0\u1eddi m\u1eb9 v\u00e0 hai c\u00f4 con g\u00e1i c\u00f9ng \u0111i mua 3 con ch\u00f3, m\u1ed7i ng\u01b0\u1eddi \u0111\u1ec1u ch\u1ecdn \u0111\u01b0\u1ee3c cho m\u00ecnh m\u1ed9t con v\u1eeba \u00fd. C\u00f3 \u0111i\u1ec1u g\u00ec v\u00f4 l\u00fd trong c\u00e2u \u0111\u1ed1 n\u00e0y kh\u00f4ng?<\/p>\n

<\/a>C\u00c2U 6:<\/h3>\n

Khi b\u1ea1n \u0103n 1 qu\u1ea3 t\u00e1o, qu\u1ea3 t\u00e1o \u0111\u00f3 c\u00f3 s\u00e2u. H\u1ecfi v\u1eeba c\u1eafn xong mi\u1ebfng \u0111\u1ea7u ti\u00ean, b\u1ea1n th\u1ea5y c\u00f3 bao nhi\u00eau con s\u00e2u trong qu\u1ea3 t\u00e1o l\u00e0 \u0111\u00e1ng s\u1ee3 nh\u1ea5t?<\/p>\n

H\u01af\u1edaNG D\u1eaaN – B\u00c0I GI\u1ea2I – \u0110\u00c1P S\u1ed0<\/h1>\n

<\/a>B\u00c0I S\u1ed0 24<\/h2>\n

<\/a>C\u00c2U 1:<\/h3>\n

B\u00e0i gi\u1ea3i:<\/p>\n

C\u00f3 7 \u0111o\u1ea1n th\u1eb3ng 1cm = 7 x 1;<\/p>\n

C\u00f3 6 \u0111o\u1ea1n th\u1eb3ng 2cm = 6 x 2;<\/p>\n

T\u01b0\u01a1ng t\u1ef1 nh\u01b0 v\u1eady, t\u1ed5ng \u0111\u1ed9 d\u00e0i c\u00e1c \u0111o\u1ea1n th\u1eb3ng l\u00e0:<\/p>\n

7 x 1 + 6 x 2 +5 x 3 + 4 x 4 + 3 x 5 + 2 x 6 + 1 x 7 = 7 + 12 +15 + 16 + 15 + 12 + 7 = 84 (cm)<\/p>\n

\u0110\u00e1p s\u1ed1: 84cm<\/p>\n

<\/a>C\u00c2U 2:<\/h3>\n

B\u00e0i gi\u1ea3i:<\/p>\n

Tr\u01b0\u1edbc ti\u00ean l\u1ea5y c\u1ea3 khuy \u00e1o v\u00e0 chai n\u01b0\u1edbc v\u00e0o 1 b\u00ean, b\u00ean kia b\u1ecf ch\u00e8, \u0111\u01b0\u1ee3c 950g ch\u00e8.<\/p>\n

L\u1ea7n th\u1ee9 2 ch\u1ec9 b\u1ecf 300g n\u01b0\u1edbc 1 b\u00ean, \u0111\u01b0\u1ee3c 300g ch\u00e8 n\u1eefa, b\u1ecf ri\u00eang ra.<\/p>\n

L\u1ea7n 3 c\u00e2n gi\u1ed1ng l\u1ea7n 2, v\u1eady l\u00e0 \u0111\u01b0\u1ee3c 600g \u1edf 2 l\u1ea7n c\u00e2n sau. B\u1ecf s\u1ed1 ch\u00e8 \u0111\u00f3 v\u00e0o 1 b\u00ean v\u00e0 b\u1ecf c\u00e1i khuy \u00e1o v\u00e0o 1 b\u00ean, ch\u01b0a c\u00e2n \u0111\u1ec1u \u0111\u00fang kh\u00f4ng? V\u1eady th\u00ec b\u1ed1c th\u00eam ch\u00e8 b\u1ecf cho \u0111\u1ec1u, nh\u01b0ng nh\u1edb l\u00e0 b\u1ecf ri\u00eang ra nh\u00e9 (n\u00f3 c\u00f3 \u0111\u00fang l\u00e0 50g kh\u00f4ng nh\u1ec9?). Sau \u0111\u00f3 l\u1ea5y s\u1ed1 ch\u00e8 m\u1edbi n\u00e0y b\u1ecf v\u00e0o 950g \u1edf l\u1ea7n c\u00e2n \u0111\u1ea7u ti\u00ean, v\u1eady l\u00e0 \u0111\u1ee7 1000g.<\/p>\n

<\/a>C\u00c2U 3:<\/h3>\n

Ta c\u00f3:<\/p>\n

\"148.jpg\"<\/p>\n

V\u1eady A = 25 ; T = 32 ; Y = 35 ; E = 100 ; M = 24 ; S = 45 ; I = 2 ; K = 64 ; G = 27 ; O = 20 ; C = 7 ; N = 18.<\/p>\n

\u0110i\u1ec1n \u0111\u1ee7 c\u00e1c ch\u1eef c\u00e1i v\u00e0o c\u00e1c \u00f4 t\u01b0\u01a1ng \u1ee9ng v\u1edbi c\u00e1c s\u1ed1 v\u00e0 th\u00eam c\u00e1c d\u1ea5u c\u1ea7n thi\u1ebft ta \u0111\u01b0\u1ee3c l\u1eddi khuy\u00ean nh\u01b0 h\u00ecnh d\u01b0\u1edbi:<\/p>\n

\"149.jpg\"<\/p>\n

<\/a>C\u00c2U 4:<\/h3>\n

\u0110\u00e1p \u00e1n:<\/p>\n

Kh\u00f4ng n\u1eafng v\u00ec ng\u00e0y 10 – 12 t\u1ee9c l\u00e0 th\u1ee9 7 m\u00e0 21h t\u1ee9c l\u00e0 9h t\u1ed1i.<\/p>\n

<\/a>C\u00c2U 5:<\/h3>\n

\u0110\u00e1p \u00e1n:<\/p>\n

Ch\u1eb3ng c\u00f3 g\u00ec v\u00f4 l\u00fd c\u1ea3 v\u00ec 3 ng\u01b0\u1eddi thu\u1ed9c 3 th\u1ebf h\u1ec7: B\u00e0, m\u1eb9, ch\u00e1u!<\/p>\n

<\/a>C\u00c2U 6:<\/h3>\n

Th\u1ea5y n\u1eeda con s\u00e2u l\u00e0 \u0111\u00e1ng s\u1ee3 nh\u1ea5t v\u00ec n\u1eeda con kia \u0111ang n\u1eb1m trong b\u1ee5ng b\u1ea1n.<\/p>\n","protected":false},"excerpt":{"rendered":"

C\u00c2U 1: Cho h\u00ecnh v\u1ebd: H\u00e3y cho bi\u1ebft tr\u00ean h\u00ecnh v\u1ebd c\u00f3 bao nhi\u00eau \u0111o\u1ea1n th\u1eb3ng? v\u00e0 t\u1ed5ng \u0111\u1ed9 d\u00e0i c\u1ee7a t\u1ea5t c\u1ea3 c\u00e1c \u0111o\u1ea1n th\u1eb3ng b\u1eb1ng bao nhi\u00eau? C\u00c2U 2: M\u1ed9t ng\u01b0\u1eddi b\u00e1n h\u00e0ng, do \u1ea5n t\u01b0\u1ee3ng sau khi xem v\u1edf k\u1ecbch c\u1ee7a Phaoxt\u01a1 \u1edf nh\u00e0 h\u00e1t, \u0111\u00e3 c\u00f3 m\u1ed9t gi\u1ea5c m\u01a1 trong khi […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":"","_disable_autopaging":false},"categories":[47],"tags":[],"class_list":["post-25558","post","type-post","status-publish","format-standard","hentry","category-do-vui"],"_links":{"self":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts\/25558","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/comments?post=25558"}],"version-history":[{"count":1,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts\/25558\/revisions"}],"predecessor-version":[{"id":25563,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts\/25558\/revisions\/25563"}],"wp:attachment":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/media?parent=25558"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/categories?post=25558"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/tags?post=25558"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}