{"common":{"save":0,"post_id":"7663","level":3,"total":10,"point":10,"point_extra":0},"segment":[{"id":"1538","post_id":"7663","mon_id":"1159414","chapter_id":"1159448","question":"<p>M\u1ed9t m\u1ea3nh \u0111\u1ea5t d\u1ea1ng hình ch\u1eef nh\u1eadt có chi\u1ec1u dài 16 m, chi\u1ec1u r\u1ed9ng 5 m. Khi v\u1ebd m\u1ea3nh \u0111\u1ea5t \u0111ó trên b\u1ea3n \u0111\u1ed3 t\u1ec9 l\u1ec7 1 : 500 thì di\u1ec7n tích hình ch\u1eef nh\u1eadt \u0111ó là:<\/p>","options":["<strong>A.<\/strong> 32 mm²","<strong>B.<\/strong> 320 mm²","<strong>C.<\/strong> 320 cm²","<strong>D.<\/strong> 32 cm²"],"correct":"2","level":"3","hint":"","answer":"<p>Ch\u1ecdn <span style=\"color:#16a085;\"><strong>B.<\/strong> 320 mm².<\/span><\/p><p>16 m = 16 000 mm ; 5 m = 5000 mm.<\/p><p>Chi\u1ec1u dài hình ch\u1eef nh\u1eadt trên b\u1ea3n \u0111\u1ed3 là 16 000 : 500 = 32 (mm).<br \/>Chi\u1ec1u r\u1ed9ng hình ch\u1eef nh\u1eadt trên b\u1ea3n \u0111\u1ed3 là 5000 : 500 = 10 (mm).<br \/>Di\u1ec7n tích hình ch\u1eef nh\u1eadt trên b\u1ea3n \u0111\u1ed3 là 32 x 10 = 320 (mm²).<\/p>","type":"choose","extra_type":"classic","time":"0","user_id":"131","test":"0","date":"2024-09-16 02:26:49","option_type":"txt","len":1},{"id":"1540","post_id":"7663","mon_id":"1159414","chapter_id":"1159448","question":"<p>N\u1ec1n c\u1ee7a m\u1ed9t phòng h\u1ecdc là hình ch\u1eef nh\u1eadt có chi\u1ec1u dài 10 m, chi\u1ec1u r\u1ed9ng 5 m. Trên b\u1ea3n \u0111\u1ed3 có t\u1ec9 l\u1ec7 1 : 200, di\u1ec7n tích c\u1ee7a n\u1ec1n phòng h\u1ecdc \u0111ó là:<\/p>","options":["<strong>A.<\/strong> 1250 mm²","<strong>B.<\/strong> 12,5 mm²","<strong>C.<\/strong> 125 mm²","<strong>D.<\/strong> 1,25 mm²"],"correct":"1","level":"3","hint":"","answer":"<p>Ch\u1ecdn <span style=\"color:#16a085;\"><strong>A.<\/strong> 1250 mm.<\/span><\/p><p>10 m = 10 000 mm ; 5 m = 5000 mm.<\/p><p>Chi\u1ec1u dài n\u1ec1n phòng h\u1ecdc trên b\u1ea3n \u0111\u1ed3 là 10 000 : 200 = 50 (mm).<br \/>Chi\u1ec1u r\u1ed9ng n\u1ec1n phòng h\u1ecdc trên b\u1ea3n \u0111\u1ed3 là 5000 : 200 = 25 (mm).<br \/>Di\u1ec7n tích n\u1ec1n phòng h\u1ecdc trên b\u1ea3n \u0111\u1ed3 là 50 x 25 = 1250 (mm²).<\/p>","type":"choose","extra_type":"classic","time":"0","user_id":"131","test":"0","date":"2024-09-16 02:31:15","option_type":"txt","len":2},{"id":"1543","post_id":"7663","mon_id":"1159414","chapter_id":"1159448","question":"<p>Nhà tr\u01b0\u1eddng mu\u1ed1n lát m\u1eb7t sàn phòng h\u1ecdc có chi\u1ec1u dài 8m, chi\u1ec1u r\u1ed9ng 5m. M\u1eabu g\u1ea1ch \u0111\u01b0\u1ee3c ch\u1ecdn có d\u1ea1ng hình vuông c\u1ea1nh 40 cm \u0111\u01b0\u1ee3c \u0111óng theo h\u1ed9p 5 viên, m\u1ed7i h\u1ed9p có giá 160 000 \u0111\u1ed3ng. S\u1ed1 ti\u1ec1n mua g\u1ea1ch là:<\/p>","options":["<strong>A.<\/strong> 900 000 \u0111\u1ed3ng","<strong>B.<\/strong> 800 000 \u0111\u1ed3ng","<strong>C.<\/strong> 9 000 000 \u0111\u1ed3ng","<strong>D.<\/strong> 8 000 000 \u0111\u1ed3ng"],"correct":"4","level":"3","hint":"","answer":"<p>Ch\u1ecdn <span style=\"color:#16a085;\"><strong>D.<\/strong> 8 000 000 \u0111\u1ed3ng.<\/span><\/p><p>Di\u1ec7n tích 1 viên g\u1ea1ch là: 40 x 40 = 1600 cm².<br \/>T\u1ed5ng di\u1ec7n tích 5 viên c\u1ee7a 1 h\u1ed9p là: 1600 x 5 = 8000 cm².<br \/>Di\u1ec7n tích sàn phòng h\u1ecdc là: 8 x 5 = 40 m² = 400 000 cm².<br \/>\u0110\u1ec3 lát sàn phòng h\u1ecdc c\u1ea7n s\u1ed1 h\u1ed9p g\u1ea1ch là: 400 000 : 8000 = 50 (h\u1ed9p).<br \/>S\u1ed1 ti\u1ec1n mua g\u1ea1ch là: 160 000 x 50 = 8 000 000 (\u0111\u1ed3ng).<\/p>","type":"choose","extra_type":"classic","time":"0","user_id":"131","test":"0","date":"2024-09-16 02:35:50","option_type":"txt","len":2}]}