{"common":{"save":0,"post_id":"6918","level":3,"total":10,"point":10,"point_extra":0},"segment":[{"id":"2672","post_id":"6918","mon_id":"1159012","chapter_id":"1159024","question":"<p>M\u1ed9t con báo s\u0103n ch\u1ea1y 1 080 m h\u1ebft <span class=\"math-tex\">$\\dfrac{3}{5}$<\/span> phút. H\u1ecfi trung bình m\u1ed7i giây con báo s\u0103n \u0111ó ch\u1ea1y \u0111\u01b0\u1ee3c bao nhiêu mét?<\/p>","options":["<strong>A.<\/strong> 30 m","<strong>B.<\/strong> 40 m","<strong>C.<\/strong> 35 m","<strong>D.<\/strong> 36 m"],"correct":"1","level":"3","hint":"","answer":"<p>Vì 1 phút = 60 giây nên <span class=\"math-tex\">$\\dfrac{3}{5}$<\/span> phút = <span class=\"math-tex\">$\\dfrac{3}{5}\\mathbf{x}60$<\/span> = 36 giây.<\/p><p>Trung bình m\u1ed7i giây con báo s\u0103n \u0111ó ch\u1ea1y \u0111\u01b0\u1ee3c s\u1ed1 mét là<\/p><p><span class=\"math-tex\">$1080 : 36=30$<\/span> m.<\/p><p>Ch\u1ecdn <span style=\"color:#16a085;\"><strong>A.<\/strong> 30 m.<\/span><\/p>","type":"choose","extra_type":"classic","time":"0","user_id":"131","test":"0","date":"2024-02-13 03:29:41","option_type":"txt","len":0},{"id":"2674","post_id":"6918","mon_id":"1159012","chapter_id":"1159024","question":"<p>M\u1ed9t xe ô tô ch\u1ea1y \u0111\u01b0\u1ee3c 480 km trong <span class=\"math-tex\">$\\dfrac{1}{3}$<\/span> ngày. H\u1ecfi trung bình m\u1ed7i gi\u1edd ô tô \u0111ó ch\u1ea1y \u0111\u01b0\u1ee3c bao nhiêu ki-lô-mét?<\/p>","options":["<strong>A.<\/strong> 50 km","<strong>B.<\/strong> 60 km","<strong>C.<\/strong> 40 km","<strong>D.<\/strong> 70 km"],"correct":"2","level":"3","hint":"","answer":"<p>Vì 1ngày = 24 gi\u1edd nên <span class=\"math-tex\">$\\dfrac{1}{3}$<\/span> ngày = <span class=\"math-tex\">$\\dfrac{1}{3}\\mathbf{x}24$<\/span> = 8 gi\u1edd.<\/p><p>Trung bình 1 gi\u1edd ô tô \u0111ó ch\u1ea1y \u0111\u01b0\u1ee3c s\u1ed1 ki-lô-mét là<\/p><p>480 : 8 = 60 km.<\/p><p>Ch\u1ecdn <span style=\"color:#16a085;\"><strong>B.<\/strong> 60 km.<\/span><\/p>","type":"choose","extra_type":"classic","time":"0","user_id":"131","test":"0","date":"2024-02-13 03:34:52","option_type":"txt","len":0},{"id":"2675","post_id":"6918","mon_id":"1159012","chapter_id":"1159024","question":"<p>Chào mào có 20 qu\u1ea3 h\u1ed3ng. Chào mào \u0103n h\u1ebft m\u1ed9t n\u1eeda c\u1ee7a m\u1ed9t n\u1eeda s\u1ed1 qu\u1ea3 h\u1ed3ng \u0111ó. Chào mào \u0111ã \u0103n h\u1ebft bao nhiêu qu\u1ea3 h\u1ed3ng?<\/p>","options":["<strong>A.<\/strong> 10 qu\u1ea3","<strong>B.<\/strong> 8 qu\u1ea3","<strong>C.<\/strong> 6 qu\u1ea3","<strong>D.<\/strong> 5 qu\u1ea3"],"correct":"4","level":"3","hint":"","answer":"<p>S\u1ed1 qu\u1ea3 h\u1ed3ng chào mào \u0111ã \u0103n là<\/p><p> <span class=\"math-tex\">$\\dfrac{1}{2}\\mathbf{x}\\dfrac{1}{2}\\mathbf{x}20=\\dfrac{1}{4}\\mathbf{x}20$<\/span> = 5 qu\u1ea3<\/p><p>Ch\u1ecdn <span style=\"color:#16a085;\"><strong>D.<\/strong> 5 qu\u1ea3.<\/span><\/p>","type":"choose","extra_type":"classic","time":"0","user_id":"131","test":"0","date":"2024-02-13 03:37:38","option_type":"txt","len":0}]}
