{"common":{"save":0,"post_id":"7659","level":1,"total":10,"point":10,"point_extra":0},"segment":[{"id":"1497","post_id":"7659","mon_id":"1159414","chapter_id":"1159448","question":"<p>20 m² = <input class=\"tim_x input_number\" tpl=\"dien_so\" type=\"text\"\/> dm²<\/p>","options":"","correct":["[\"2000\"]"],"level":"1","hint":"<p>1 m² = 100 dm²<\/p>","answer":"<p>20 m² = <span style=\"color:#16a085;\"><strong>2000<\/strong><\/span> dm²<\/p><p>V\u1eady s\u1ed1 c\u1ea7n \u0111i\u1ec1n là <span style=\"color:#16a085;\"><strong>2000<\/strong><\/span>.<\/p>","type":"blank","extra_type":"","time":"0","user_id":"131","test":"0","date":"2024-09-16 01:18:46"},{"id":"1498","post_id":"7659","mon_id":"1159414","chapter_id":"1159448","question":"<p>\u0110i\u1ec1n s\u1ed1 thích h\u1ee3p vào ch\u1ed7 ch\u1ea5m: 710 000 mm² = … dm²<\/p>","options":["<strong>A.<\/strong> 71 000","<strong>B.<\/strong> 7100","<strong>C.<\/strong> 710","<strong>D.<\/strong> 71"],"correct":"4","level":"1","hint":"<p>1 dm² = 10 000 mm² nên 1 mm² = <span class=\"math-tex\">$\\dfrac{1}{10000}$<\/span> dm²<\/p>","answer":"<p>Ch\u1ecdn <span style=\"color:#16a085;\"><strong>D.<\/strong> 71<\/span><\/p><p>710 000 mm² = <span style=\"color:#16a085;\"><strong>71<\/strong><\/span> dm²<\/p>","type":"choose","extra_type":"classic","time":"0","user_id":"131","test":"0","date":"2024-09-16 01:21:00","option_type":"txt","len":0},{"id":"1499","post_id":"7659","mon_id":"1159414","chapter_id":"1159448","question":"<p>\u0110i\u1ec1n s\u1ed1 thích h\u1ee3p vào ch\u1ed7 ch\u1ea5m: 2100 mm² = … cm²<\/p>","options":["<strong>A.<\/strong> 21 000","<strong>B.<\/strong> 21","<strong>C.<\/strong> 210","<strong>D.<\/strong> 2,1"],"correct":"2","level":"1","hint":"<p>1 cm² = 100 mm² nên 1 mm² = <span class=\"math-tex\">$\\dfrac{1}{100}$<\/span> cm²<\/p>","answer":"<p>Ch\u1ecdn <span style=\"color:#16a085;\"><strong>B.<\/strong> 21<\/span><\/p><p>2100 mm² = <span class=\"math-tex\">$\\dfrac{2100}{100}$<\/span> cm² = <strong><span style=\"color:#16a085;\">21<\/span><\/strong> cm²<\/p>","type":"choose","extra_type":"classic","time":"0","user_id":"131","test":"0","date":"2024-09-16 01:25:05","option_type":"txt","len":0}]}