Biểu thức chứa chữ

Home Lớp 4 Toán lớp 4 - Sách Kết nối tri thức Bài 4: Biểu thức chứa chữBài tập nâng cao

{"common":{"save":0,"post_id":"6749","level":3,"total":10,"point":10,"point_extra":0},"segment":[{"id":"821","post_id":"6749","mon_id":"1159012","chapter_id":"1159016","question":"Tính giá tr\u1ecb c\u1ee7a bi\u1ec3u th\u1ee9c 6 x a x a v\u1edbi a = 7.<\/p>","options":["A.<\/strong> 296","B.<\/strong> 295","C.<\/strong> 294","D.<\/strong> 293"],"correct":"3","level":"3","hint":"","answer":" V\u1edbi a = 7 thì <\/p>6 x a x a<\/p>= 6 x 7 x 7<\/p>= 42 x 7<\/p>= 294<\/p>Ch\u1ecdn C.<\/strong> 294<\/span><\/p>","type":"choose","extra_type":"classic","time":"0","user_id":"131","test":"0","date":"2023-10-08 05:26:20","option_type":"txt","len":0},{"id":"822","post_id":"6749","mon_id":"1159012","chapter_id":"1159016","question":"Bi\u1ec3u th\u1ee9c nào có giá tr\u1ecb là 2 700 v\u1edbi a = 20, b = 15?<\/p>","options":["A.<\/strong> 9 x a + b","B.<\/strong> 9 x a x b","C.<\/strong> 9 + a + b","D.<\/strong> 9 + a x b"],"correct":"2","level":"3","hint":"","answer":"V\u1edbi a = 20, b = 15 thì<\/p>A.<\/strong> 9 x a + b = 9 x 20 + 15 = 195<\/p>B.<\/strong> 9 x a x b = 9 x 20 x 15 = 2 700<\/strong><\/span><\/p>C.<\/strong> 9 + a + b = 9 + 20 + 15 = 44<\/p>D.<\/strong> 9 + a x b = 9 + 20 x 15 = 309<\/p>Ch\u1ecdn B.<\/strong> 9 x a x b<\/span><\/p>","type":"choose","extra_type":"shape1","time":"0","user_id":"131","test":"0","date":"2023-10-08 05:31:03","option_type":"txt","len":0},{"id":"823","post_id":"6749","mon_id":"1159012","chapter_id":"1159016","question":"V\u1edbi giá tr\u1ecb nào c\u1ee7a m thì bi\u1ec3u th\u1ee9c (m – 125) x 3 có giá tr\u1ecb b\u1eb1ng 1 125?<\/p>","options":["A.<\/strong> m = 400","B.<\/strong> m = 300","C.<\/strong> m = 100","D.<\/strong> m = 500"],"correct":"4","level":"3","hint":"","answer":"A.<\/strong> m = 400 thì (m – 125) x 3 = (400 – 125) x 3 = 825<\/p>B.<\/strong> m = 300 thì (m – 125) x 3 = (300 – 125) x 3 = 525<\/p>C.<\/strong> m = 200 thì (m – 125) x 3 = (200 – 125) x 3 = 225<\/p>D.<\/strong> m = 500 thì (m – 125) x 3 = (500 – 125) x 3 = 1 125<\/strong><\/span><\/p>Ch\u1ecdn D.<\/strong> m = 500<\/span><\/p>","type":"choose","extra_type":"classic","time":"0","user_id":"131","test":"0","date":"2023-10-08 05:36:38","option_type":"txt","len":0}]}