四年级下册 运算律（笔算）
姓名：_______________
学号：_______________
用时：_______________
| 82 × 6 = 6 × __ | 97 × 7 = (100 - __) × 7 |
| 97 × 6 = 100 × 6 - __ × 6 | (20 + 16) × 2 = 40 + __ |
| 97 × 5 = 100 × 5 - __ × 5 | 46 + 36 + 31 = (46 + __) + 31 |
| 55 × 8 = 8 × __ | 20 × 4 = 4 × __ |
| 45 + 47 + 19 = (45 + __) + 19 | (1 + 2) × 3 = 3 + __ |
| (13 + 11) × 7 = 91 + __ | 53 × 3 = 3 × __ |
| 97 × 6 = 6 × __ | 34 + 49 + 41 = (34 + __) + 41 |
| 98 × 7 = 100 × 7 - __ × 7 | 95 × 5 = (100 - __) × 5 |
| 22 + 1 + 15 = (22 + __) + 15 | 97 × 3 = 100 × 3 - __ × 3 |
| 50 × 5 = 5 × __ | 29 + 69 = 69 + __ |
| 39 + 1 + 49 = (39 + __) + 49 | 5 + 35 + 49 = (5 + __) + 49 |
| (18 + 18) × 3 = 54 + __ | 47 + 80 = 80 + __ |
| (9 + 15) × 3 = 27 + __ | 57 + 48 = 48 + __ |
| (19 + 9) × 9 = 171 + __ | (18 + 14) × 6 = 108 + __ |
| 16 + 16 + 13 = (16 + __) + 13 | 53 + 20 = 20 + __ |
| (1 + 7) × 7 = 7 + __ | 85 + 24 = 24 + __ |
| 51 + 78 = 78 + __ | 81 + 55 = 55 + __ |
| 97 × 8 = 100 × 8 - __ × 8 | 22 + 37 = 37 + __ |
四年级下册 运算律（笔算）（答案）
姓名：_______________
学号：_______________
用时：_______________
| 82 × 6 = 6 × __ 82 | 97 × 7 = (100 - __) × 7 3 |
| 97 × 6 = 100 × 6 - __ × 6 3 | (20 + 16) × 2 = 40 + __ 32 |
| 97 × 5 = 100 × 5 - __ × 5 3 | 46 + 36 + 31 = (46 + __) + 31 36 |
| 55 × 8 = 8 × __ 55 | 20 × 4 = 4 × __ 20 |
| 45 + 47 + 19 = (45 + __) + 19 47 | (1 + 2) × 3 = 3 + __ 6 |
| (13 + 11) × 7 = 91 + __ 77 | 53 × 3 = 3 × __ 53 |
| 97 × 6 = 6 × __ 97 | 34 + 49 + 41 = (34 + __) + 41 49 |
| 98 × 7 = 100 × 7 - __ × 7 2 | 95 × 5 = (100 - __) × 5 5 |
| 22 + 1 + 15 = (22 + __) + 15 1 | 97 × 3 = 100 × 3 - __ × 3 3 |
| 50 × 5 = 5 × __ 50 | 29 + 69 = 69 + __ 29 |
| 39 + 1 + 49 = (39 + __) + 49 1 | 5 + 35 + 49 = (5 + __) + 49 35 |
| (18 + 18) × 3 = 54 + __ 54 | 47 + 80 = 80 + __ 47 |
| (9 + 15) × 3 = 27 + __ 45 | 57 + 48 = 48 + __ 57 |
| (19 + 9) × 9 = 171 + __ 81 | (18 + 14) × 6 = 108 + __ 84 |
| 16 + 16 + 13 = (16 + __) + 13 16 | 53 + 20 = 20 + __ 53 |
| (1 + 7) × 7 = 7 + __ 49 | 85 + 24 = 24 + __ 85 |
| 51 + 78 = 78 + __ 51 | 81 + 55 = 55 + __ 81 |
| 97 × 8 = 100 × 8 - __ × 8 3 | 22 + 37 = 37 + __ 22 |