Chú ý: Để đảm bảo quyền lợi và bảo vệ tài khoản của mình
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{"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 cùng làm chung m\u1ed9t công vi\u1ec7c. Trong bu\u1ed5i sáng, c\u1ea3 hai ng\u01b0\u1eddi làm \u0111\u01b0\u1ee3c <span class=\"math-tex\">$\\dfrac{2}{9}$<\/span> công vi\u1ec7c. Bi\u1ebft ng\u01b0\u1eddi th\u1ee9 nh\u1ea5t làm \u0111\u01b0\u1ee3c <span class=\"math-tex\">$\\dfrac{1}{8}$<\/span> công vi\u1ec7c. V\u1eady ng\u01b0\u1eddi th\u1ee9 hai làm \u0111\u01b0\u1ee3c:<\/p>","options":["<strong>A.<\/strong> <span class=\"math-tex\">$\\dfrac{7}{72}$<\/span> công vi\u1ec7c","<strong>B.<\/strong> <span class=\"math-tex\">$\\dfrac{17}{27}$<\/span> công vi\u1ec7c","<strong>C.<\/strong> <span class=\"math-tex\">$\\dfrac{17}{72}$<\/span> công vi\u1ec7c","<strong>D.<\/strong> <span class=\"math-tex\">$\\dfrac{27}{72}$<\/span> công vi\u1ec7c"],"correct":"1","level":"3","hint":"","answer":"<p>Ch\u1ecdn <span style=\"color:#16a085;\"><strong>A.<\/strong> <span class=\"math-tex\">$\\dfrac{7}{72}$<\/span> công vi\u1ec7c.<\/span><\/p><p>Ng\u01b0\u1eddi th\u1ee9 hai làm \u0111\u01b0\u1ee3c <span class=\"math-tex\">$\\dfrac{2}{9}-\\dfrac{1}{8}=\\dfrac{16}{72}-\\dfrac{9}{72}=\\dfrac{7}{72}$<\/span> (công 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 cùng \u0111i l\u1ea5y n\u01b0\u1edbc \u0111\u1ed5 vào bình \u0111\u1ec3 pha n\u01b0\u1edbc chanh cho c\u1ea3 nhóm. Bi\u1ebft Hoa \u0111ã \u0111\u1ed5 <span class=\"math-tex\">$\\dfrac{1}{6}l$<\/span>, Lan \u0111\u1ed5 <br \/><span class=\"math-tex\">$\\dfrac{4}{7}l$<\/span>, D\u0169ng \u0111\u1ed5 <span class=\"math-tex\">$\\dfrac{13}{42}l$<\/span>. T\u1ed5ng s\u1ed1 lít n\u01b0\u1edbc mà ba b\u1ea1n \u0111ã l\u1ea5y là:<\/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 <span style=\"color:#16a085;\"><strong>C.<\/strong> <span class=\"math-tex\">$\\dfrac{22}{21}l$<\/span>.<\/span><\/p><p>T\u1ed5ng s\u1ed1 lít n\u01b0\u1edbc mà ba b\u1ea1n \u0111ã l\u1ea5y là:<\/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> (<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 sách nhân d\u1ecbp sinh nh\u1eadt. Ngày th\u1ee9 nh\u1ea5t Minh \u0111\u1ecdc \u0111\u01b0\u1ee3c <span class=\"math-tex\">$\\dfrac{4}{15}$<\/span> quy\u1ec3n sách, ngày th\u1ee9 hai Minh \u0111\u1ecdc \u0111\u01b0\u1ee3c <span class=\"math-tex\">$\\dfrac{2}{3}$<\/span> quy\u1ec3n sách. V\u1eady trong hai ngày Minh \u0111ã \u0111\u1ecdc \u0111\u01b0\u1ee3c:<\/p>","options":["<strong>A.<\/strong> <span class=\"math-tex\">$\\dfrac{14}{19}$<\/span> quy\u1ec3n sách","<strong>B.<\/strong> <span class=\"math-tex\">$\\dfrac{12}{13}$<\/span> quy\u1ec3n sách","<strong>C.<\/strong> <span class=\"math-tex\">$\\dfrac{15}{13}$<\/span> quy\u1ec3n sách","<strong>D.<\/strong> <span class=\"math-tex\">$\\dfrac{14}{15}$<\/span> quy\u1ec3n sách"],"correct":"4","level":"3","hint":"","answer":"<p>Ch\u1ecdn <span style=\"color:#16a085;\"><strong>D.<\/strong> <span class=\"math-tex\">$\\dfrac{14}{15}$<\/span> quy\u1ec3n sách.<\/span><\/p><p>Trong hai ngày Minh \u0111ã \u0111\u1ecdc \u0111\u01b0\u1ee3c: <span class=\"math-tex\">$\\dfrac{4}{15}+\\dfrac{2}{3}=\\dfrac{4}{15}+\\dfrac{10}{15}=\\dfrac{14}{15}$<\/span> (quy\u1ec3n sách).<\/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}]}