{"id":25645,"date":"2021-12-24T17:38:08","date_gmt":"2021-12-24T10:38:08","guid":{"rendered":"https:\/\/www.vietlearn.org\/post\/?p=25645"},"modified":"2021-12-24T17:38:09","modified_gmt":"2021-12-24T10:38:09","slug":"bai-so-40-do-vui-luyen-tri-thong-minh","status":"publish","type":"post","link":"https:\/\/www.vietlearn.org\/kien-thuc\/bai-so-40-do-vui-luyen-tri-thong-minh\/","title":{"rendered":"B\u00c0I S\u1ed0 40 &#8211; \u0110\u1ed1 vui luy\u1ec7n tr\u00ed th\u00f4ng minh"},"content":{"rendered":"<h3><a id=\"post-25645-CAU_1_39\"><\/a>C\u00c2U 1:<\/h3>\n<p>S\u1ed1 ti\u1ebfp theo trong d\u00e3y s\u1ed1 sau \u0111\u00e2y l\u00e0 s\u1ed1 n\u00e0o? b\u1ea1n h\u00e3y khoanh tr\u00f2n v\u00e0o \u0111\u00e1p \u00e1n \u0111\u00fang nh\u00e9!<\/p>\n<p>1\u2026 2\u2026 3\u2026 5&#8230; 8\u2026 13\u2026 21\u2026 34&#8230;?<\/p>\n<table>\n<tbody>\n<tr>\n<td><\/td>\n<td><\/td>\n<td><\/td>\n<td><\/td>\n<\/tr>\n<tr>\n<td>A. 40<\/td>\n<td>B. 68<\/td>\n<td>C. 55<\/td>\n<td>D. 48<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h3><a id=\"post-25645-CAU_2_38\"><\/a>C\u00c2U 2:<\/h3>\n<p>C\u00f3 16 c\u00e2y t\u1ea5t c\u1ea3, b\u1ea1n h\u00e3y tr\u1ed3ng \u0111\u1ee7 s\u1ed1 c\u00e2y sao cho: c\u00f3 t\u1ea5t c\u1ea3 8 h\u00e0ng m\u00e0:<\/p>\n<p>&#8211; 4 h\u00e0ng 4 c\u00e2y<\/p>\n<p>&#8211; 4 h\u00e0ng 5 c\u00e2y<\/p>\n<p>Ch\u00fa \u00fd: kho\u1ea3ng c\u00e1ch c\u00e1c c\u00e2y trong h\u00e0ng ph\u1ea3i c\u00e1ch \u0111\u1ec1u nhau.<\/p>\n<h3><a id=\"post-25645-CAU_3_39\"><\/a>C\u00c2U 3:<\/h3>\n<p>M\u1ed9t con g\u00e0 tr\u1ed1ng \u0111\u1ebb 10 qu\u1ea3 tr\u1ee9ng, m\u1ed7i b\u01b0\u1edbc \u0111i \u0111\u1ec3 l\u1ea1i 1 qu\u1ea3. \u0110\u1ed1 b\u1ea1n, 9 b\u01b0\u1edbc con g\u00e0 tr\u1ed1ng \u0111\u1ec3 l\u1ea1i bao nhi\u00eau qu\u1ea3?<\/p>\n<h3><a id=\"post-25645-CAU_4_35\"><\/a>C\u00c2U 4:<\/h3>\n<p>6 + 6 + 6 + 6 + 6 + 6 + 6 + 6 + 6 + 6=?<\/p>\n<p>B\u1eb1ng bao nhi\u00eau ai bi\u1ebft n\u00e0o? T\u00ednh th\u1eadt nhanh b\u00e9 nh\u00e9! ch\u1ec9 3 gi\u00e2y th\u00f4i!<\/p>\n<p>6 x 10= ?<\/p>\n<h3><a id=\"post-25645-CAU_5_26\"><\/a>C\u00c2U 5:<\/h3>\n<p>Nam \u0111ang c\u1eaft m\u00f3ng tay, 1 ph\u00fat c\u1eaft \u0111\u01b0\u1ee3c hai m\u00f3ng h\u1ecfi trong 7 ph\u00fat Nam c\u1eaft \u0111\u01b0\u1ee3c bao nhi\u00eau m\u00f3ng tay?<\/p>\n<h3><a id=\"post-25645-CAU_6_13\"><\/a>C\u00c2U 6:<\/h3>\n<p>\u0110\u1ea7u c\u1ee7a m\u1ed9t con ng\u1ef1a quay v\u1ec1 h\u01b0\u1edbng b\u1eafc h\u1ecfi \u0111u\u00f4i n\u00f3 quay v\u1ec1 h\u01b0\u1edbng n\u00e0o?<\/p>\n<h3><a id=\"post-25645-CAU_7_4\"><\/a>C\u00c2U 7:<\/h3>\n<p>\u0110\u1ed1 b\u1ea1n, c\u00f3 9 que di\u00eam l\u00e0m sao b\u1ea1n x\u1ebfp \u0111\u01b0\u1ee3c th\u00e0nh 10 h\u00e0ng d\u1ecdc?<\/p>\n<h3><a id=\"post-25645-CAU_8\"><\/a>C\u00c2U 8:<\/h3>\n<p>Trong gi\u1edd ra ch\u01a1i c\u1ee7a ng\u00e0y th\u1ee9 2, b\u1ed1n c\u00f4 sinh vi\u00ean t\u00ean l\u00e0 Hoa, An, B\u00ecnh, Nh\u00e0n ng\u1ed3i n\u00f3i chuy\u1ec7n quanh m\u1ed9t c\u00e1i b\u00e0n tr\u00f2n. C\u00f4 m\u1eb7c \u00e1o d\u00e0i xanh th\u00ec ng\u1ed3i gi\u1eefa c\u00f4 m\u1eb7c \u00e1o d\u00e0i t\u00edm v\u00e0 c\u00f4 Nh\u00e0n. C\u00f4 m\u1eb7c \u00e1o d\u00e0i tr\u1eafng th\u00ec ng\u1ed3i gi\u1eefa c\u00f4 m\u1eb7c \u00e1o d\u00e0i h\u1ed3ng v\u00e0 c\u00f4 B\u00ecnh.<\/p>\n<p>Bi\u1ebft r\u1eb1ng An v\u00e0 B\u00ecnh kh\u00f4ng m\u1eb7c \u00e1o d\u00e0i xanh. H\u1ecfi ai m\u1eb7c \u00e1o d\u00e0i m\u00e0u g\u00ec?<\/p>\n<h3><a id=\"post-25645-CAU_9\"><\/a>C\u00c2U 9:<\/h3>\n<p>Tu\u1ed5i \u00d4ng g\u1ea5p \u0111\u00f4i tu\u1ed5i M\u1eb9<\/p>\n<p>2 tu\u1ed5i M\u1eb9 tr\u1ebb h\u01a1n Ba<\/p>\n<p>G\u1ea5p 5 tu\u1ed5i b\u00e9 ra l\u00e0 tu\u1ed5i Ba<\/p>\n<p>\u00d4ng 66 tu\u1ed5i \u0111\u00e2y nha<\/p>\n<p>Bao nhi\u00eau tu\u1ed5i B\u00e9 g\u1ea7n xa t\u00ednh gi\u00f9m?<\/p>\n<h1>H\u01af\u1edaNG D\u1eaaN &#8211; B\u00c0I GI\u1ea2I &#8211; \u0110\u00c1P S\u1ed0<\/h1>\n<h2><a id=\"post-25645-BAI_SO_40_1\"><\/a>B\u00c0I S\u1ed0 40<\/h2>\n<h3><a id=\"post-25645-CAU_1_78\"><\/a>C\u00c2U 1:<\/h3>\n<p>\u0110\u00f3 l\u00e0 s\u1ed1 55 v\u00ec:<\/p>\n<p>1+ 2 = 3<\/p>\n<p>3+ 2 = 5<\/p>\n<p>3+ 5 = 8<\/p>\n<p>8+ 5 = 13<\/p>\n<p>13 + 8 = 21<\/p>\n<p>21 + 13 = 34<\/p>\n<p>34 + 21 = 55<\/p>\n<p>K\u1ebft qu\u1ea3 b\u1ea1n n\u00e0o ch\u1ecdn ph\u01b0\u01a1ng \u00e1n C l\u00e0 \u0111\u00fang.<\/p>\n<h3><a id=\"post-25645-CAU_2_78\"><\/a>C\u00c2U 2:<\/h3>\n<p>D\u01b0\u1edbi \u0111\u00e2y xin gi\u1edbi thi\u1ec7u m\u1ed9t c\u00e1ch tr\u1ed3ng:<\/p>\n<p><img fetchpriority=\"high\" decoding=\"async\" width=\"317\" height=\"262\" class=\"wp-image-25646\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/185-jpg.jpeg\" alt=\"185.jpg\" srcset=\"https:\/\/www.vietlearn.org\/kien-thuc\/wp-content\/uploads\/2021\/12\/185-jpg.jpeg 317w, https:\/\/www.vietlearn.org\/kien-thuc\/wp-content\/uploads\/2021\/12\/185-jpg-300x248.jpeg 300w\" sizes=\"(max-width: 317px) 100vw, 317px\" \/><\/p>\n<h3><a id=\"post-25645-CAU_3_79\"><\/a>C\u00c2U 3:<\/h3>\n<p>Con g\u00e0 tr\u1ed1ng kh\u00f4ng \u0111\u1ebb \u0111\u01b0\u1ee3c tr\u1ee9ng. N\u00ean 9 b\u01b0\u1edbc \u0111i con g\u00e0 tr\u1ed1ng kh\u00f4ng \u0111\u1ec3 l\u1ea1i tr\u00e1i n\u00e0o.<\/p>\n<h3><a id=\"post-25645-CAU_4_73\"><\/a>C\u00c2U 4:<\/h3>\n<p>B\u00e0i gi\u1ea3i:<\/p>\n<p>6 + 6 + 6 + 6 + 6 + 6 + 6 + 6 + 6 + 6 = 10 x 6 = 60<\/p>\n<p>10 x 6 = 6 + 6 + 6 + 6 + 6 + 6 + 6 + 6 + 6 + 6 = 60<\/p>\n<p>\u0110\u00e1p s\u1ed1: 60<\/p>\n<h3><a id=\"post-25645-CAU_5_53\"><\/a>C\u00c2U 5:<\/h3>\n<p>Nam ch\u1ec9 c\u00f3 10 ng\u00f3n tay, v\u1eady 7 ph\u00fat Nam c\u0169ng ch\u1ec9 c\u1eaft \u0111\u01b0\u1ee3c 10 m\u00f3ng tay th\u00f4i!<\/p>\n<h3><a id=\"post-25645-CAU_6_27\"><\/a>C\u00c2U 6:<\/h3>\n<p>\u0110u\u00f4i n\u00f3 ch\u0129a xu\u1ed1ng \u0111\u1ea5t!<\/p>\n<h3><a id=\"post-25645-CAU_7_8\"><\/a>C\u00c2U 7:<\/h3>\n<p>X\u1ebfp th\u00e0nh 9 h\u00e0ng d\u1ecdc (nh\u1edb x\u1ebfp th\u1eb3ng h\u00e0ng), nh\u00ecn t\u1eeb tr\u00ean xu\u1ed1ng th\u00e0nh h\u00e0ng d\u1ecdc th\u1ee9 10.<\/p>\n<h3><a id=\"post-25645-CAU_8_1\"><\/a>C\u00c2U 8:<\/h3>\n<p>C\u00f4 Nh\u00e0n m\u1eb7c \u00e1o d\u00e0i h\u1ed3ng<\/p>\n<p>C\u00f4 B\u00ecnh m\u1eb7c \u00e1o d\u00e0i t\u00edm<\/p>\n<p>C\u00f4 An m\u1eb7c \u00e1o d\u00e0i tr\u1eafng<\/p>\n<p>M\u1eb7c \u00e1o d\u00e0i xanh l\u00e0 c\u00f4 Hoa.<\/p>\n<h3><a id=\"post-25645-CAU_9_1\"><\/a>C\u00c2U 9:<\/h3>\n<p>B\u00e0i gi\u1ea3i:<\/p>\n<p>Tu\u1ed5i m\u1eb9 l\u00e0:<\/p>\n<p>66 : 2 = 33 (tu\u1ed5i)<\/p>\n<p>Tu\u1ed5i ba l\u00e0:<\/p>\n<p>33 + 2 = 35 (tu\u1ed5i)<\/p>\n<p>Tu\u1ed5i b\u00e9 l\u00e0:<\/p>\n<p>35 : 5 = 7 (tu\u1ed5i)<\/p>\n<p>\u0110\u00e1p s\u1ed1: 7 (tu\u1ed5i).<\/p>\n","protected":false},"excerpt":{"rendered":"<p>C\u00c2U 1: S\u1ed1 ti\u1ebfp theo trong d\u00e3y s\u1ed1 sau \u0111\u00e2y l\u00e0 s\u1ed1 n\u00e0o? b\u1ea1n h\u00e3y khoanh tr\u00f2n v\u00e0o \u0111\u00e1p \u00e1n \u0111\u00fang nh\u00e9! 1\u2026 2\u2026 3\u2026 5&#8230; 8\u2026 13\u2026 21\u2026 34&#8230;? A. 40 B. 68 C. 55 D. 48 C\u00c2U 2: C\u00f3 16 c\u00e2y t\u1ea5t c\u1ea3, b\u1ea1n h\u00e3y tr\u1ed3ng \u0111\u1ee7 s\u1ed1 c\u00e2y sao cho: c\u00f3 t\u1ea5t [&hellip;]<\/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-25645","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\/25645","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=25645"}],"version-history":[{"count":1,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts\/25645\/revisions"}],"predecessor-version":[{"id":25647,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts\/25645\/revisions\/25647"}],"wp:attachment":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/media?parent=25645"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/categories?post=25645"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/tags?post=25645"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}