{"common":{"save":0,"post_id":"8908","level":2,"total":10,"point":10,"point_extra":0},"segment":[{"id":"4817","post_id":"8908","mon_id":"1159414","chapter_id":"1159498","question":"<p>M\u1ed9t con báo có th\u1ec3 ch\u1ea1y v\u1edbi v\u1eadn t\u1ed1c 100 km\/h. V\u1eady trong 9 phút con báo \u0111ó có th\u1ec3 ch\u1ea1y \u0111\u01b0\u1ee3c s\u1ed1 ki-lô-mét là:<\/p>","options":["<strong>A.<\/strong> 16 km.","<strong>B.<\/strong> 900 km.","<strong>C.<\/strong> 15 km.","<strong>D.<\/strong> 90 km."],"correct":"3","level":"2","hint":"","answer":"<p>Ch\u1ecdn <span style=\"color:#16a085;\"><strong>C.<\/strong> 15 km.<\/span><\/p><p>\u0110\u1ed5i: 9 phút = 0,15 gi\u1edd.<\/p><p>Trong 9 phút con báo có th\u1ec3 ch\u1ea1y \u0111\u01b0\u1ee3c s\u1ed1 ki-lô-mét là:<\/p><p>100 x 0,15 = 15 (km).<\/p>","type":"choose","extra_type":"shape2","time":"0","user_id":"131","test":"0","date":"2025-04-18 08:26:07","option_type":"txt","len":0},{"id":"4818","post_id":"8908","mon_id":"1159414","chapter_id":"1159498","question":"<p>M\u1ed9t con th\u1ecf ch\u1ea1y v\u1edbi v\u1eadn t\u1ed1c 6 m\/s. H\u1ecfi con th\u1ecf ch\u1ea1y h\u1ebft quãng \u0111\u01b0\u1eddng dài 1800 m trong bao nhiêu phút?<\/p>","options":["<strong>A.<\/strong> 300 giây.","<strong>B.<\/strong> 360 giây.","<strong>C.<\/strong> 6 phút.","<strong>D.<\/strong> 5 phút."],"correct":"4","level":"2","hint":"","answer":"<p>Ch\u1ecdn <span style=\"color:#16a085;\"><strong>D.<\/strong> 5 phút.<\/span><\/p><p>Th\u1eddi gian con th\u1ecf ch\u1ea1y h\u1ebft quãng \u0111\u01b0\u1eddng 1800 m là:<\/p><p>1800 : 6 = 300 (giây).<\/p><p>\u0110\u1ed5i: 300 giây = 5 phút.<\/p>","type":"choose","extra_type":"classic","time":"0","user_id":"131","test":"0","date":"2025-04-18 08:32:36","option_type":"txt","len":2},{"id":"4819","post_id":"8908","mon_id":"1159414","chapter_id":"1159498","question":"<p>M\u1ed9t con h\u1ed5 có th\u1ec3 ch\u1ea1y v\u1edbi t\u1ed1c \u0111\u1ed9 66 km\/h. H\u1ecfi trong 20 phút, con h\u1ed5 có th\u1ec3 ch\u1ea1y \u0111\u01b0\u1ee3c bao nhiêu mét?<\/p>","options":["<strong>A.<\/strong> 2200 m.","<strong>B.<\/strong> 22 m.","<strong>C.<\/strong> 22 000 m.","<strong>D.<\/strong> 1320 m."],"correct":"3","level":"2","hint":"","answer":"<p>Ch\u1ecdn <span style=\"color:#16a085;\"><strong>C.<\/strong> 22 000 m.<\/span><\/p><p>\u0110\u1ed5i: 20 phút = <span class=\"math-tex\">$\\dfrac{1}{3}$<\/span> gi\u1edd.<\/p><p>Trong 20 phút, con h\u1ed5 có th\u1ec3 ch\u1ea1y \u0111\u01b0\u1ee3c quãng \u0111\u01b0\u1eddng là:<\/p><p>66 x <span class=\"math-tex\">$\\dfrac{1}{3}$<\/span> = 22 (km).<\/p><p>\u0110\u1ed5i: 22 km = 22 000 m.<\/p>","type":"choose","extra_type":"classic","time":"0","user_id":"131","test":"0","date":"2025-04-18 08:38:48","option_type":"txt","len":1}]}