{"common":{"save":0,"post_id":"7567","level":3,"total":10,"point":10,"point_extra":0},"segment":[{"id":"1211","post_id":"7567","mon_id":"1159414","chapter_id":"1159417","question":"<p>Hai ng\u01b0\u1eddi c&ugrave;ng l&agrave;m chung m\u1ed9t c&ocirc;ng vi\u1ec7c. Trong bu\u1ed5i s&aacute;ng, c\u1ea3 hai ng\u01b0\u1eddi l&agrave;m \u0111\u01b0\u1ee3c&nbsp;<span class=\"math-tex\">$\\dfrac{2}{9}$<\/span>&nbsp;c&ocirc;ng vi\u1ec7c.&nbsp;Bi\u1ebft ng\u01b0\u1eddi th\u1ee9 nh\u1ea5t l&agrave;m \u0111\u01b0\u1ee3c&nbsp;<span class=\"math-tex\">$\\dfrac{1}{8}$<\/span>&nbsp;c&ocirc;ng vi\u1ec7c. V\u1eady ng\u01b0\u1eddi th\u1ee9 hai l&agrave;m \u0111\u01b0\u1ee3c:<\/p>","options":["<strong>A.<\/strong> <span class=\"math-tex\">$\\dfrac{7}{72}$<\/span> c&ocirc;ng vi\u1ec7c","<strong>B.<\/strong> <span class=\"math-tex\">$\\dfrac{17}{27}$<\/span> c&ocirc;ng vi\u1ec7c","<strong>C.<\/strong> <span class=\"math-tex\">$\\dfrac{17}{72}$<\/span> c&ocirc;ng vi\u1ec7c","<strong>D.<\/strong> <span class=\"math-tex\">$\\dfrac{27}{72}$<\/span> c&ocirc;ng vi\u1ec7c"],"correct":"1","level":"3","hint":"","answer":"<p>Ch\u1ecdn&nbsp;<span style=\"color:#16a085;\"><strong>A.<\/strong>&nbsp;<span class=\"math-tex\">$\\dfrac{7}{72}$<\/span>&nbsp;c&ocirc;ng vi\u1ec7c.<\/span><\/p><p>Ng\u01b0\u1eddi th\u1ee9 hai l&agrave;m \u0111\u01b0\u1ee3c&nbsp;<span class=\"math-tex\">$\\dfrac{2}{9}-\\dfrac{1}{8}=\\dfrac{16}{72}-\\dfrac{9}{72}=\\dfrac{7}{72}$<\/span>&nbsp;(c&ocirc;ng vi\u1ec7c).<\/p>","type":"choose","extra_type":"classic","time":"0","user_id":"131","test":"0","date":"2024-08-21 12:28:07","option_type":"math","len":0},{"id":"1213","post_id":"7567","mon_id":"1159414","chapter_id":"1159417","question":"<p>Ba b\u1ea1n Hoa, Lan, D\u0169ng c&ugrave;ng \u0111i l\u1ea5y n\u01b0\u1edbc \u0111\u1ed5 v&agrave;o b&igrave;nh \u0111\u1ec3 pha n\u01b0\u1edbc chanh cho c\u1ea3 nh&oacute;m. Bi\u1ebft Hoa \u0111&atilde; \u0111\u1ed5&nbsp;<span class=\"math-tex\">$\\dfrac{1}{6}l$<\/span>, Lan \u0111\u1ed5&nbsp;<br \/><span class=\"math-tex\">$\\dfrac{4}{7}l$<\/span>, D\u0169ng \u0111\u1ed5&nbsp;<span class=\"math-tex\">$\\dfrac{13}{42}l$<\/span>. T\u1ed5ng s\u1ed1 l&iacute;t n\u01b0\u1edbc m&agrave; ba b\u1ea1n \u0111&atilde; l\u1ea5y l&agrave;:<\/p>","options":["<strong>A.<\/strong> <span class=\"math-tex\">$\\dfrac{23}{22}l$<\/span>","<strong>B.<\/strong> <span class=\"math-tex\">$\\dfrac{21}{22}l$<\/span>","<strong>C.<\/strong> <span class=\"math-tex\">$\\dfrac{22}{21}l$<\/span>","<strong>D.<\/strong> <span class=\"math-tex\">$\\dfrac{23}{21}l$<\/span>"],"correct":"3","level":"3","hint":"","answer":"<p>Ch\u1ecdn&nbsp;<span style=\"color:#16a085;\"><strong>C.<\/strong>&nbsp;<span class=\"math-tex\">$\\dfrac{22}{21}l$<\/span>.<\/span><\/p><p>T\u1ed5ng s\u1ed1 l&iacute;t n\u01b0\u1edbc m&agrave; ba b\u1ea1n \u0111&atilde; l\u1ea5y l&agrave;:<\/p><p><span class=\"math-tex\">$\\dfrac{1}{6}+\\dfrac{4}{7}+\\dfrac{13}{42}=\\dfrac{7}{42}+\\dfrac{24}{42}+\\dfrac{13}{42}=\\dfrac{31}{42}+\\dfrac{13}{42}=\\dfrac{44}{42}=\\dfrac{22}{21}$<\/span>&nbsp;(<span class=\"math-tex\">$l$<\/span>).<\/p>","type":"choose","extra_type":"classic","time":"0","user_id":"131","test":"0","date":"2024-08-21 12:33:04","option_type":"math","len":0},{"id":"1215","post_id":"7567","mon_id":"1159414","chapter_id":"1159417","question":"<p>Minh \u0111\u01b0\u1ee3c m\u1eb9 mua t\u1eb7ng m\u1ed9t quy\u1ec3n s&aacute;ch nh&acirc;n d\u1ecbp sinh nh\u1eadt. Ng&agrave;y th\u1ee9 nh\u1ea5t Minh \u0111\u1ecdc \u0111\u01b0\u1ee3c&nbsp;<span class=\"math-tex\">$\\dfrac{4}{15}$<\/span>&nbsp;quy\u1ec3n s&aacute;ch, ng&agrave;y th\u1ee9&nbsp;hai Minh \u0111\u1ecdc \u0111\u01b0\u1ee3c&nbsp;<span class=\"math-tex\">$\\dfrac{2}{3}$<\/span>&nbsp;quy\u1ec3n s&aacute;ch. V\u1eady trong hai ng&agrave;y Minh \u0111&atilde; \u0111\u1ecdc \u0111\u01b0\u1ee3c:<\/p>","options":["<strong>A.<\/strong> <span class=\"math-tex\">$\\dfrac{14}{19}$<\/span> quy\u1ec3n s&aacute;ch","<strong>B.<\/strong> <span class=\"math-tex\">$\\dfrac{12}{13}$<\/span> quy\u1ec3n s&aacute;ch","<strong>C.<\/strong> <span class=\"math-tex\">$\\dfrac{15}{13}$<\/span> quy\u1ec3n s&aacute;ch","<strong>D.<\/strong> <span class=\"math-tex\">$\\dfrac{14}{15}$<\/span> quy\u1ec3n s&aacute;ch"],"correct":"4","level":"3","hint":"","answer":"<p>Ch\u1ecdn&nbsp;<span style=\"color:#16a085;\"><strong>D.<\/strong>&nbsp;<span class=\"math-tex\">$\\dfrac{14}{15}$<\/span>&nbsp;quy\u1ec3n s&aacute;ch.<\/span><\/p><p>Trong hai ng&agrave;y Minh \u0111&atilde; \u0111\u1ecdc \u0111\u01b0\u1ee3c:&nbsp;<span class=\"math-tex\">$\\dfrac{4}{15}+\\dfrac{2}{3}=\\dfrac{4}{15}+\\dfrac{10}{15}=\\dfrac{14}{15}$<\/span>&nbsp;(quy\u1ec3n s&aacute;ch).<\/p>","type":"choose","extra_type":"classic","time":"0","user_id":"131","test":"0","date":"2024-08-25 02:32:13","option_type":"math","len":0}]}