{"common":{"save":0,"post_id":"4470","level":3,"total":10,"point":10,"point_extra":0},"segment":[{"id":"6118","post_id":"4470","mon_id":"1158113","chapter_id":"1158119","question":"<p>Lan, Mai, Hoa&nbsp;c&ugrave;ng l&agrave;m m\u1ed9t c&ocirc;ng vi\u1ec7c. N\u1ebfu l&agrave;m ri&ecirc;ng, Lan m\u1ea5t 12 gi\u1edd, Mai m\u1ea5t 10 gi\u1edd, Hoa m\u1ea5t 9 gi\u1edd&nbsp;m\u1edbi l&agrave;m xong c&ocirc;ng vi\u1ec7c. H\u1ecfi n\u1ebfu ba b\u1ea1n&nbsp;c&ugrave;ng l&agrave;m th&igrave; sau 1 gi\u1edd l&agrave;m xong bao nhi&ecirc;u ph\u1ea7n c&ocirc;ng vi\u1ec7c?<\/p>","options":["<strong>A<\/strong>. <span class=\"math-tex\">$\\dfrac{53}{180}$<\/span> c&ocirc;ng vi\u1ec7c","<strong>B<\/strong>. <span class=\"math-tex\">$\\dfrac{47}{180}$<\/span> c&ocirc;ng vi\u1ec7c","<strong>C<\/strong>. <span class=\"math-tex\">$\\dfrac{59}{180}$<\/span> c&ocirc;ng vi\u1ec7c","<strong>D<\/strong>. <span class=\"math-tex\">$\\dfrac{61}{180}$<\/span> c&ocirc;ng vi\u1ec7c"],"correct":"1","level":"3","hint":"<p>S\u1ed1 ph\u1ea7n c&ocirc;ng vi\u1ec7c l&agrave;m trong 1 gi\u1edd = 1 : s\u1ed1 gi\u1edd l&agrave;m xong c&ocirc;ng vi\u1ec7c \u0111&oacute; m\u1ed9t m&igrave;nh.<\/p>","answer":"<p>V&igrave; Lan l&agrave;m xong&nbsp;c&ocirc;ng vi\u1ec7c h\u1ebft 12 gi\u1edd n&ecirc;n trong 1 gi\u1edd Lan l&agrave;m \u0111\u01b0\u1ee3c&nbsp;<span class=\"math-tex\">$\\dfrac{1}{12}$<\/span>&nbsp;ph\u1ea7n c&ocirc;ng vi\u1ec7c.<\/p><p>V&igrave; Mai l&agrave;m xong c&ocirc;ng vi\u1ec7c h\u1ebft 10 gi\u1edd n&ecirc;n trong 1 gi\u1edd Mai l&agrave;m \u0111\u01b0\u1ee3c&nbsp;<span class=\"math-tex\">$\\dfrac{1}{10}$<\/span>&nbsp;ph\u1ea7n c&ocirc;ng&nbsp;vi\u1ec7c.<\/p><p>V&igrave; Hoa l&agrave;m xong c&ocirc;ng vi\u1ec7c h\u1ebft 9 gi\u1edd n&ecirc;n trong 1 gi\u1edd Hoa l&agrave;m \u0111\u01b0\u1ee3c&nbsp;<span class=\"math-tex\">$\\dfrac{1}{9}$<\/span>&nbsp;ph\u1ea7n c&ocirc;ng vi\u1ec7c.<\/p><p>V\u1eady n\u1ebfu ba b\u1ea1n c&ugrave;ng l&agrave;m th&igrave; sau 1 gi\u1edd s\u1ed1 ph\u1ea7n c&ocirc;ng vi\u1ec7c l&agrave;m xong l&agrave;&nbsp;<\/p><p><span class=\"math-tex\">$\\dfrac{1}{12} + \\dfrac{1}{10} + \\dfrac{1}{9}$<\/span>&nbsp;=&nbsp;<span class=\"math-tex\">$\\dfrac{15}{180} + \\dfrac{18}{180} + \\dfrac{20}{180}$<\/span>&nbsp;=&nbsp;<span class=\"math-tex\">$\\dfrac{15+18+20}{180} $<\/span>&nbsp;=&nbsp;<span style=\"color:#16a085;\"><span class=\"math-tex\">$\\dfrac{53}{180}$<\/span>&nbsp; &nbsp;(c&ocirc;ng vi\u1ec7c)<\/span><\/p><p>\u0110&aacute;p &aacute;n \u0111&uacute;ng l&agrave;&nbsp; &nbsp;<strong><span style=\"color:#16a085;\">A<\/span><\/strong>.<span style=\"color:#16a085;\"><span class=\"math-tex\">$\\dfrac{53}{180}$<\/span>&nbsp;<strong>c&ocirc;ng vi\u1ec7c<\/strong><\/span><\/p>","type":"choose","extra_type":"classic","time":"0","user_id":"131","test":"3","date":"2021-08-21 04:06:49","option_type":"math","len":0},{"id":"6171","post_id":"4470","mon_id":"1158113","chapter_id":"1158119","question":"<p>T&iacute;nh chu vi c\u1ee7a m\u1ed9t mi\u1ebfng b&igrave;a h&igrave;nh tam gi&aacute;c bi\u1ebft \u0111\u1ed9 d&agrave;i ba c\u1ea1nh l\u1ea7n l\u01b0\u1ee3t l&agrave;:<\/p><p><span class=\"math-tex\">$9\\dfrac{6}{7}$<\/span>&nbsp;cm&nbsp; ;&nbsp;&nbsp;&nbsp;<span class=\"math-tex\">$10\\dfrac{2}{3}$<\/span>&nbsp;cm&nbsp; ;&nbsp; &nbsp;&nbsp;<span class=\"math-tex\">$12\\dfrac{10}{21}$<\/span>&nbsp;cm<\/p>","options":["<strong>A<\/strong>. 32 cm","<strong>B<\/strong>. 33 cm","<strong>C<\/strong>. 34 cm","<strong>D<\/strong>. 35 cm"],"correct":"2","level":"3","hint":"<p>Chu vi tam gi&aacute;c b\u1eb1ng t\u1ed5ng \u0111\u1ed9 d&agrave;i&nbsp;ba c\u1ea1nh.<\/p>","answer":"<p>Chu vi mi\u1ebfng b&igrave;a l&agrave;:<\/p><p>&nbsp; &nbsp;&nbsp;<span class=\"math-tex\">$9\\dfrac{6}{7}$<\/span>&nbsp; +&nbsp;&nbsp;<span class=\"math-tex\">$10\\dfrac{2}{3}$<\/span>&nbsp; +&nbsp;&nbsp;<span class=\"math-tex\">$12\\dfrac{10}{21}$<\/span>&nbsp;<\/p><p>=&nbsp;<span class=\"math-tex\">$9+\\dfrac{6}{7} + 10 +\\dfrac{2}{3} + 12+\\dfrac{10}{21}$<\/span><\/p><p>=&nbsp;<span class=\"math-tex\">$9+10+12+\\dfrac{6}{7}+\\dfrac{2}{3}+\\dfrac{10}{21}$<\/span><\/p><p>=&nbsp;<span class=\"math-tex\">$31 + \\dfrac{18}{21} + \\dfrac{14}{21} + \\dfrac{10}{21}$<\/span>&nbsp;<\/p><p>=&nbsp;<span class=\"math-tex\">$31+\\dfrac{18+14+10}{21}$<\/span><\/p><p>=&nbsp;<span class=\"math-tex\">$31 + \\dfrac{42}{21}$<\/span><\/p><p>=&nbsp;<span class=\"math-tex\">$31+2$<\/span>&nbsp;= <strong><span style=\"color:#16a085;\">33 cm<\/span><\/strong><\/p><p>\u0110&aacute;p &aacute;n \u0111&uacute;ng l&agrave; <span style=\"color:#16a085;\"><strong>B<\/strong><\/span>.<strong><span style=\"color:#16a085;\">33 cm<\/span><\/strong><\/p>","type":"choose","extra_type":"classic","time":"0","user_id":"131","test":"3","date":"2021-08-21 12:21:26","option_type":"txt","len":0},{"id":"6177","post_id":"4470","mon_id":"1158113","chapter_id":"1158119","question":"<p>T&iacute;nh b\u1eb1ng c&aacute;ch&nbsp;h\u1ee3p l&iacute;<\/p><p><strong>Q<\/strong> =&nbsp;<span class=\"math-tex\">$-\\dfrac{8}{9}+\\dfrac{17}{6}+\\dfrac{23}{9}-\\dfrac{25}{6}-5$<\/span><\/p>","options":["<strong>A<\/strong>. Q = <span class=\"math-tex\">$\\dfrac{-14}{3}$<\/span>","<strong>B <\/strong>.Q = <span class=\"math-tex\">$\\dfrac{-11}{3}$<\/span>","<strong>C<\/strong>. Q = <span class=\"math-tex\">$\\dfrac{-17}{3}$<\/span>","<strong>D<\/strong>. Q = <span class=\"math-tex\">$\\dfrac{-19}{3}$<\/span>"],"correct":"1","level":"3","hint":"<p>Nh&oacute;m c&aacute;c ph&acirc;n s\u1ed1 c&oacute; c&ugrave;ng m\u1eabu l\u1ea1i v\u1edbi nhau r\u1ed3i th\u1ef1c hi\u1ec7n ph&eacute;p t&iacute;nh.<\/p>","answer":"<p>Nh&oacute;m c&aacute;c ph&acirc;n s\u1ed1 c&oacute; c&ugrave;ng m\u1eabu l\u1ea1i v\u1edbi nhau, r\u1ed3i th\u1ef1c hi\u1ec7n ph&eacute;p t&iacute;nh.<\/p><p>Q =&nbsp;<span class=\"math-tex\">$-\\dfrac{8}{9}+\\dfrac{17}{6}+\\dfrac{23}{9}-\\dfrac{25}{6}-5$<\/span><\/p><p>Q =&nbsp;<span class=\"math-tex\">$\\dfrac{-8}{9}+\\dfrac{23}{9}+\\dfrac{17}{6}-\\dfrac{25}{6}-5$<\/span><\/p><p>Q =&nbsp;<span class=\"math-tex\">$\\dfrac{-8+23}{9}+\\dfrac{17-25}{6}-5$<\/span><\/p><p>Q =&nbsp;<span class=\"math-tex\">$\\dfrac{15}{9}+\\dfrac{-8}{6}-5$<\/span><\/p><p>Q =&nbsp;<span class=\"math-tex\">$\\dfrac{5}{3}+\\dfrac{-4}{3}-5$<\/span><\/p><p>Q =&nbsp;<span class=\"math-tex\">$\\dfrac{5}{3}+\\dfrac{-4}{3}-\\dfrac{15}{3}$<\/span><\/p><p>Q =&nbsp;<span class=\"math-tex\">$\\dfrac{5-4-15}{3}$<\/span><\/p><p><strong><span style=\"color:#16a085;\">Q =&nbsp;<span class=\"math-tex\">$\\dfrac{-14}{3}$<\/span><\/span><\/strong><\/p><p>\u0110&aacute;p &aacute;n \u0111&uacute;ng l&agrave; <strong><span style=\"color:#16a085;\">A<\/span><\/strong>.<strong><span style=\"color:#16a085;\"><span class=\"math-tex\">$\\dfrac{-14}{3}$<\/span><\/span><\/strong><\/p>","type":"choose","extra_type":"classic","time":"0","user_id":"131","test":"3","date":"2021-08-21 12:58:34","option_type":"math","len":0}]}