{"id":25584,"date":"2021-12-24T17:25:00","date_gmt":"2021-12-24T10:25:00","guid":{"rendered":"https:\/\/www.vietlearn.org\/post\/?p=25584"},"modified":"2021-12-24T17:25:06","modified_gmt":"2021-12-24T10:25:06","slug":"bai-so-29-do-vui-luyen-tri-thong-minh","status":"publish","type":"post","link":"https:\/\/www.vietlearn.org\/kien-thuc\/bai-so-29-do-vui-luyen-tri-thong-minh\/","title":{"rendered":"B\u00c0I S\u1ed0 29 – \u0110\u1ed1 vui luy\u1ec7n tr\u00ed th\u00f4ng minh"},"content":{"rendered":"

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

Trong c\u00e1c h\u00ecnh A, B, C, D h\u00ecnh n\u00e0o s\u1ebd b\u1ecb lo\u1ea1i?<\/p>\n

\"57_2.jpg\"<\/p>\n

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

Trong c\u00e1c h\u00ecnh A, B, C, D h\u00ecnh n\u00e0o s\u1ebd b\u1ecb lo\u1ea1i?<\/p>\n

\"58_1.jpg\"<\/p>\n

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

C\u00f3 2 tr\u1ee9ng g\u00e0 v\u00e0 4 tr\u1ee9ng v\u1ecbt.<\/p>\n

N\u01b0\u1edbc b\u1eaft \u0111\u1ea7u s\u00f4i ta m\u1edbi b\u1ecf tr\u1ee9ng v\u00e0o.<\/p>\n

Tr\u1ee9ng g\u00e0 2 ph\u00fat th\u00ec ch\u00edn.<\/p>\n

Tr\u1ee9ng v\u1ecbt 4 ph\u00fat th\u00ec ch\u00edn.<\/p>\n

C\u00e1i n\u1ed3i ch\u1ec9 b\u1ecf v\u00e0o \u0111\u01b0\u1ee3c 4 tr\u1ee9ng.<\/p>\n

H\u1ecfi lu\u1ed9c 6 tr\u1ee9ng th\u00ec m\u1ea5t \u00edt nh\u1ea5t bao nhi\u00eau ph\u00fat?<\/p>\n

Tr\u00ecnh b\u00e0y c\u1ee5 th\u1ec3 c\u00e1ch lu\u1ed9c.<\/p>\n

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

\"58_2.jpg\"<\/p>\n

B\u1ea1n h\u00e3y \u0111i\u1ec1n \u0111\u1ea7y \u0111\u1ee7 c\u00e1c s\u1ed1 t\u1eeb 1 \u0111\u1ebfn 8 v\u00e0o c\u00e1c \u0111\u1ec9nh c\u1ee7a h\u00ecnh l\u1eadp ph\u01b0\u01a1ng sao cho t\u1ed5ng b\u1ed1n con s\u1ed1 \u1edf 4 \u0111\u00ecnh thu\u1ed9c m\u1ed7i m\u1eb7t \u0111\u1ec1u b\u1eb1ng 18.<\/p>\n

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

Vi\u1ebft t\u1eeb 1 \u0111\u1ebfn 300<\/p>\n

\u0110\u1ed1 em, \u0111\u1ed1 b\u1ea1n gi\u1ecfi ch\u0103m nhi \u0111\u1ed3ng<\/p>\n

C\u1ea7n bao nhi\u00eau ch\u1eef s\u1ed1 0?<\/p>\n

\u0110\u00e1p nhanh g\u1eafn ng\u1ef1c b\u00f4ng h\u1ed3ng th\u1eafm t\u01b0\u01a1i<\/p>\n

\u0110\u1ed1 vui v\u1eeba h\u1ecdc v\u1eeba c\u01b0\u1eddi<\/p>\n

Thi \u0111ua xem th\u1eed ai ng\u01b0\u1eddi gi\u1ecfi h\u01a1n.<\/p>\n

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

<\/a>B\u00c0I S\u1ed0 29<\/h2>\n

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

H\u00ecnh A; B; D \u0111\u1ec1u c\u00f3 tr\u1ee5c \u0111\u1ed1i x\u1ee9ng th\u1eb3ng \u0111\u1ee9ng.<\/p>\n

Ri\u00eang h\u00ecnh C kh\u00f4ng c\u00f3 tr\u1ee5c \u0111\u1ed1i x\u1ee9ng th\u1eb3ng \u0111\u1ee9ng n\u00ean h\u00ecnh C b\u1ecb lo\u1ea1i.<\/p>\n

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

H\u00ecnh A; B; D \u0111\u1ec1u c\u00f3 hai tr\u1ee5c \u0111\u1ed1i x\u1ee9ng d\u1ecdc v\u00e0 ngang. Ri\u00eang h\u00ecnh C ch\u1ec9 c\u00f3 tr\u1ee5c \u0111\u1ed1i x\u1ee9ng d\u1ecdc. V\u1eady h\u00ecnh C b\u1ecb lo\u1ea1i.<\/p>\n

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

\u0110\u1ea7u ti\u00ean cho 4 qu\u1ea3 tr\u1ee9ng v\u1ecbt. \u0111un \u0111\u01b0\u1ee3c 3 ph\u00fat th\u00ec v\u1edbt 2 qu\u1ea3 ra, cho hai qu\u1ea3 tr\u1ee9ng g\u00e0 v\u00e0o. H\u1ebft 4 ph\u00fat, 2 qu\u1ea3 tr\u1ee9ng v\u1ecbt trong n\u1ed3i ch\u00edn ==> v\u1edbt ra, cho hai qu\u1ea3 l\u00fac tr\u01b0\u1edbc v\u00e0o.<\/p>\n

==> h\u1ebft 5 ph\u00fat c\u1ea3 tr\u1ee9ng v\u1ecbt v\u00e0 tr\u1ee9ng g\u00e0 \u0111\u1ec1u ch\u00edn.<\/p>\n

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

\u0110\u00e2y l\u00e0 m\u1ed9t b\u00e0i to\u00e1n m\u1edf, c\u00f3 nhi\u1ec1u c\u00e1ch \u0111i\u1ec1n c\u00e1c s\u1ed1 t\u1eeb 1 \u0111\u1ebfn 8 v\u00e0o c\u00e1c \u0111\u1ec9nh c\u1ee7a h\u00ecnh l\u1eadp ph\u01b0\u01a1ng th\u1ecfa m\u00e3n \u0111i\u1ec1u ki\u1ec7n t\u1ed5ng 4 s\u1ed1 \u1edf 4 \u0111\u1ec9nh thu\u1ed9c m\u1ed7i m\u1eb7t \u0111\u1ec1u b\u1eb1ng 18.<\/p>\n

Xin gi\u1edbi thi\u1ec7u 3 c\u00e1ch \u0111\u1ec3 c\u00e1c b\u1ea1n tham kh\u1ea3o:<\/p>\n

\"157.jpg\"<\/p>\n

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

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

T\u1eeb 1 \u0111\u1ebfn 99 ta c\u00f3 c\u00e1c s\u1ed1 mang ch\u1eef s\u1ed1 0 l\u00e0:<\/p>\n

10, 20, 30, 40, 50, 60, 70, 80, 90<\/p>\n

V\u1eady ta c\u1ea7n 9 ch\u1eef s\u1ed1 0<\/p>\n

\u0110\u1ec3 vi\u1ebft c\u00e1c s\u1ed1 t\u1eeb 101 \u0111\u1ebfn 109 ta c\u1ea7n 9 ch\u1eef s\u1ed1 0.<\/p>\n

\u0110\u1ec3 vi\u1ebft c\u00e1c s\u1ed1 t\u1eeb 20 \u0111\u1ebfn 209 ta c\u1ea7n 9 ch\u1eef s\u1ed1 0.<\/p>\n

\u0110\u1ec3 vi\u1ebft c\u00e1c s\u1ed1 tr\u00f2n ch\u1ee5c 110, 120… 190 ta c\u1ea7n 9 ch\u1eef s\u1ed1 0.<\/p>\n

\u0110\u1ec3 vi\u1ebft c\u00e1c s\u1ed1 tr\u00f2n ch\u1ee5c 210, 220… 290 ta c\u1ea7n 9 ch\u1eef s\u1ed1 0.<\/p>\n

\u0110\u1ec3 vi\u1ebft c\u00e1c s\u1ed1 100, 200, 300 ta c\u1ea7n 6 ch\u1eef s\u1ed1 0.<\/p>\n

V\u1eady \u0111\u1ec3 vi\u1ebft t\u1eeb 1 \u0111\u1ebfn 300 ta c\u1ea7n s\u1ed1 ch\u1eef s\u1ed1 0 l\u00e0:<\/p>\n

9 x 5 + 6 = 51 (ch\u1eef s\u1ed1 0)<\/p>\n

\u0110\u00e1p s\u1ed1: 51 ch\u1eef s\u1ed1 0<\/p>\n","protected":false},"excerpt":{"rendered":"

C\u00c2U 1: Trong c\u00e1c h\u00ecnh A, B, C, D h\u00ecnh n\u00e0o s\u1ebd b\u1ecb lo\u1ea1i? C\u00c2U 2: Trong c\u00e1c h\u00ecnh A, B, C, D h\u00ecnh n\u00e0o s\u1ebd b\u1ecb lo\u1ea1i? C\u00c2U 3: C\u00f3 2 tr\u1ee9ng g\u00e0 v\u00e0 4 tr\u1ee9ng v\u1ecbt. N\u01b0\u1edbc b\u1eaft \u0111\u1ea7u s\u00f4i ta m\u1edbi b\u1ecf tr\u1ee9ng v\u00e0o. Tr\u1ee9ng g\u00e0 2 ph\u00fat th\u00ec ch\u00edn. Tr\u1ee9ng v\u1ecbt […]<\/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-25584","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\/25584","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=25584"}],"version-history":[{"count":2,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts\/25584\/revisions"}],"predecessor-version":[{"id":25590,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts\/25584\/revisions\/25590"}],"wp:attachment":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/media?parent=25584"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/categories?post=25584"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/tags?post=25584"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}