{"common":{"save":0,"post_id":"6893","level":3,"total":10,"point":10,"point_extra":0},"segment":[{"id":"2786","post_id":"6893","mon_id":"1159012","chapter_id":"1159027","question":"<p>M\u1ed9t v\u01b0\u1eddn c&acirc;y \u0103n qu\u1ea3 c&oacute;&nbsp;210 c&acirc;y. Trong \u0111&oacute;, c&acirc;y m&iacute;t&nbsp;chi\u1ebfm&nbsp;<span class=\"math-tex\">$\\dfrac{1}{3}$<\/span>&nbsp;s\u1ed1 c&acirc;y trong v\u01b0\u1eddn, c&acirc;y b\u01b0\u1edfi chi\u1ebfm&nbsp;<span class=\"math-tex\">$\\dfrac{2}{7}$<\/span>&nbsp;s\u1ed1 c&acirc;y trong v\u01b0\u1eddn, c&ograve;n l\u1ea1i l&agrave; c&acirc;y xo&agrave;i. H\u1ecfi trong v\u01b0\u1eddn lo\u1ea1i c&acirc;y n&agrave;o nhi\u1ec1u nh\u1ea5t?<\/p>","options":["<strong>A.<\/strong> S\u1ed1 c&acirc;y m&iacute;t nhi\u1ec1u nh\u1ea5t","<strong>B.<\/strong> S\u1ed1 c&acirc;y b\u01b0\u1edfi nhi\u1ec1u nh\u1ea5t","<strong>C.<\/strong> S\u1ed1 c&acirc;y xo&agrave;i nhi\u1ec1u nh\u1ea5t","<strong>D.<\/strong> C\u1ea3 ba lo\u1ea1i c&acirc;y b\u1eb1ng nhau"],"correct":"3","level":"3","hint":"","answer":"<p>S\u1ed1 c&acirc;y m&iacute;t trong v\u01b0\u1eddn l&agrave;:&nbsp;<\/p><p>210 x&nbsp;<span class=\"math-tex\">$\\dfrac{1}{3}$<\/span>&nbsp;= 70 (c&acirc;y)<\/p><p>S\u1ed1 c&acirc;y b\u01b0\u1edfi trong v\u01b0\u1eddn l&agrave;:&nbsp;<\/p><p>210 x&nbsp;<span class=\"math-tex\">$\\dfrac{2}{7}$<\/span>&nbsp;= 60 (c&acirc;y)<\/p><p>S\u1ed1 c&acirc;y xo&agrave;i trong v\u01b0\u1eddn l&agrave;:<\/p><p>210&nbsp;&ndash; 70&nbsp;&ndash; 60 = 80 (c&acirc;y)<\/p><p>Ch\u1ecdn&nbsp;<span style=\"color:#16a085;\"><strong>C.<\/strong>&nbsp;S\u1ed1 c&acirc;y xo&agrave;i nhi\u1ec1u nh\u1ea5t<\/span><\/p>","type":"choose","extra_type":"classic","time":"0","user_id":"131","test":"0","date":"2024-02-14 03:22:54","option_type":"txt","len":2},{"id":"2788","post_id":"6893","mon_id":"1159012","chapter_id":"1159027","question":"<p>M\u1ed9t khu v\u01b0\u1eddn h&igrave;nh ch\u1eef nh\u1eadt c&oacute; di\u1ec7n t&iacute;ch l&agrave;&nbsp;<span class=\"math-tex\">$\\dfrac{49}{45}$<\/span>&nbsp;m&sup2; v&agrave; chi\u1ec1u r\u1ed9ng l&agrave;&nbsp;<span class=\"math-tex\">$\\dfrac{7}{9}$<\/span>&nbsp;m. T&iacute;nh chi\u1ec1u d&agrave;i c\u1ee7a khu v\u01b0\u1eddn.<\/p>","options":["<strong>A.<\/strong> <span class=\"math-tex\">$\\dfrac{7}{6}$<\/span> (m)","<strong>B.<\/strong> <span class=\"math-tex\">$\\dfrac{7}{5}$<\/span> (m)","<strong>C.<\/strong> <span class=\"math-tex\">$\\dfrac{5}{7}$<\/span> (m)","<strong>D.<\/strong> <span class=\"math-tex\">$\\dfrac{7}{9}$<\/span> (m)"],"correct":"2","level":"3","hint":"<p>C&ocirc;ng th\u1ee9c t&iacute;nh di\u1ec7n t&iacute;ch h&igrave;nh ch\u1eef nh\u1eadt<\/p>","answer":"<p>Chi\u1ec1u d&agrave;i c\u1ee7a khu v\u01b0\u1eddn l&agrave;:<\/p><p><span class=\"math-tex\">$\\dfrac{49}{45}$<\/span>&nbsp;:&nbsp;<span class=\"math-tex\">$\\dfrac{7}{9}$<\/span>&nbsp;=&nbsp;<span class=\"math-tex\">$\\dfrac{49}{45}$<\/span>&nbsp;x&nbsp;<span class=\"math-tex\">$\\dfrac{9}{7}$<\/span>&nbsp;=&nbsp;<span class=\"math-tex\">$\\dfrac{49 \\times 9}{45 \\times 7}$<\/span>&nbsp;=&nbsp;<span class=\"math-tex\">$\\dfrac{7 \\times 1}{5 \\times 1}$<\/span>&nbsp;=&nbsp;<span class=\"math-tex\">$\\dfrac{7}{5}$<\/span>&nbsp;(m)<\/p><p>Ch\u1ecdn&nbsp;<span style=\"color:#16a085;\"><strong>B.<\/strong>&nbsp;<span class=\"math-tex\">$\\dfrac{7}{5}$<\/span>&nbsp;(m)<\/span><\/p>","type":"choose","extra_type":"classic","time":"0","user_id":"131","test":"0","date":"2024-02-14 03:24:52","option_type":"math","len":0},{"id":"2792","post_id":"6893","mon_id":"1159012","chapter_id":"1159027","question":"<p>B&igrave;nh c&oacute; 500 000 \u0111\u1ed3ng ti\u1ec1n ti\u1ebft ki\u1ec7m. B&igrave;nh \u0111&atilde; d&ugrave;ng&nbsp;<span class=\"math-tex\">$\\dfrac{3}{5}$<\/span>&nbsp;s\u1ed1 ti\u1ec1n \u0111&oacute; \u0111\u1ec3 mua d\u1ee5ng c\u1ee5 h\u1ecdc t\u1eadp, s\u1ed1 ti\u1ec1n c&ograve;n l\u1ea1i B&igrave;nh d&ugrave;ng \u0111\u1ec3 mua qu&agrave;&nbsp;t\u1eb7ng sinh nh\u1eadt m\u1eb9. H\u1ecfi B&igrave;nh \u0111&atilde; d&ugrave;ng bao nhi&ecirc;u ti\u1ec1n \u0111\u1ec3 mua qu&agrave; t\u1eb7ng m\u1eb9?<\/p>","options":["<strong>A.<\/strong> 120 000 \u0111\u1ed3ng","<strong>B.<\/strong> 300 000 \u0111\u1ed3ng","<strong>C.<\/strong> 250 000 \u0111\u1ed3ng","<strong>D.<\/strong> 200 000 \u0111\u1ed3ng"],"correct":"4","level":"3","hint":"","answer":"<p>S\u1ed1 ti\u1ec1n \u0111\u1ec3 mua d\u1ee5ng c\u1ee5 h\u1ecdc t\u1eadp l&agrave;:<\/p><p>500 000 x&nbsp;<span class=\"math-tex\">$\\dfrac{3}{5}$<\/span>&nbsp;= 300 000 (\u0111\u1ed3ng)<\/p><p>S\u1ed1&nbsp;ti\u1ec1n \u0111\u1ec3 mua qu&agrave; t\u1eb7ng m\u1eb9 l&agrave;:<\/p><p>500 000&nbsp;&ndash; 300 000 = 200 000 (\u0111\u1ed3ng)<\/p><p>Ch\u1ecdn&nbsp;<span style=\"color:#16a085;\"><strong>D.<\/strong>&nbsp;200 000 \u0111\u1ed3ng<\/span><\/p>","type":"choose","extra_type":"classic","time":"0","user_id":"131","test":"0","date":"2024-02-14 03:48:45","option_type":"txt","len":1}]}