{"common":{"save":0,"post_id":"7684","level":3,"total":10,"point":10,"point_extra":0},"segment":[{"id":"1720","post_id":"7684","mon_id":"1159414","chapter_id":"1159449","question":"<p>M\u1ed9t can nh\u1ef1a ch\u1ee9a 10 lít d\u1ea7u. Bi\u1ebft m\u1ed9t lít d\u1ea7u cân n\u1eb7ng 0,8 kg, can r\u1ed7ng cân n\u1eb7ng 1,2 kg. H\u1ecfi 5 can d\u1ea7u nh\u01b0 th\u1ebf cân n\u1eb7ng bao nhiêu ki-lô-gam?<\/p>","options":["<strong>A.<\/strong> 4,6 kg","<strong>B.<\/strong> 46 kg","<strong>C.<\/strong> 5,4 kg","<strong>D.<\/strong> 54 kg"],"correct":"2","level":"3","hint":"","answer":"<p>Ch\u1ecdn <span style=\"color:#16a085;\"><strong>B.<\/strong> 46 kg.<\/span><\/p><p>10 lít d\u1ea7u n\u1eb7ng s\u1ed1 ki-lô-gam là: 0,8 x 10 = 8 (kg).<br \/>1 can d\u1ea7u cân n\u1eb7ng s\u1ed1 ki-lô-gam là: 8 + 1,2 = 9,2 (kg).<br \/>5 can d\u1ea7u nh\u01b0 th\u1ebf cân n\u1eb7ng s\u1ed1 ki-lô-gam là: 9,2 x 5 = 46 (kg).<\/p>","type":"choose","extra_type":"classic","time":"0","user_id":"131","test":"0","date":"2024-09-20 02:38:24","option_type":"txt","len":0},{"id":"1723","post_id":"7684","mon_id":"1159414","chapter_id":"1159449","question":"<p>Tính thu\u1eadn ti\u1ec7n: 83,19 x 657 – 83,19 + 83,19 x 344 =…<\/p>","options":["<strong>A.<\/strong> 8,319","<strong>B.<\/strong> 831,9","<strong>C.<\/strong> 8319","<strong>D.<\/strong> 83190"],"correct":"4","level":"3","hint":"","answer":"<p>Ch\u1ecdn <span style=\"color:#16a085;\"><strong>D.<\/strong> 83190.<\/span><\/p><p>83,19 x 657 – 83,19 + 83,19 x 344<\/p><p>= 83,19 x (657 – 1 + 344)<\/p><p>= 83,19 x 1000<\/p><p>= 83190.<\/p>","type":"choose","extra_type":"classic","time":"0","user_id":"131","test":"0","date":"2024-09-20 02:43:27","option_type":"txt","len":0},{"id":"1724","post_id":"7684","mon_id":"1159414","chapter_id":"1159449","question":"<p>Cho hình ch\u1eef nh\u1eadt MNPQ có chi\u1ec1u dài 16,7cm; chi\u1ec1u r\u1ed9ng 10cm. Di\u1ec7n tích hình ch\u1eef nh\u1eadt là:<\/p>","options":["<strong>A.<\/strong> 167 cm²","<strong>B.<\/strong> 16,7 cm²","<strong>C.<\/strong> 1,67 cm²","<strong>D.<\/strong> 1670 cm²"],"correct":"1","level":"3","hint":"","answer":"<p>Ch\u1ecdn <span style=\"color:#16a085;\"><strong>A.<\/strong> 167 cm².<\/span><\/p><p>Di\u1ec7n tích hình ch\u1eef nh\u1eadt là: 16,7 x 10 = 167 (cm²).<\/p>","type":"choose","extra_type":"classic","time":"0","user_id":"131","test":"0","date":"2024-09-20 02:46:00","option_type":"txt","len":2}]}
