四年级下册 运算律（笔算）
姓名：_______________
学号：_______________
用时：_______________
| 91 × 9 = 9 × __ | 51 + 69 = 69 + __ |
| 98 × 6 = (100 - __) × 6 | 96 × 8 = (100 - __) × 8 |
| 20 + 66 = 66 + __ | (5 + 9) × 9 = 45 + __ |
| (20 + 1) × 8 = 160 + __ | 54 + 38 = 38 + __ |
| 89 + 76 = 76 + __ | 14 + 5 + 28 = (14 + __) + 28 |
| 34 + 16 + 12 = (34 + __) + 12 | 42 + 76 = 76 + __ |
| 95 × 5 = 100 × 5 - __ × 5 | 51 × 6 = 6 × __ |
| 27 × 8 = 8 × __ | 49 + 49 + 49 = (49 + __) + 49 |
| 29 × 8 = 8 × __ | 95 × 6 = (100 - __) × 6 |
| 98 × 7 = (100 - __) × 7 | 62 × 5 = 5 × __ |
| 86 + 84 = 84 + __ | (9 + 17) × 7 = 63 + __ |
| 6 + 29 + 35 = (6 + __) + 35 | (7 + 9) × 5 = 35 + __ |
| 28 + 40 + 28 = (28 + __) + 28 | 22 + 32 + 34 = (22 + __) + 34 |
| 28 × 4 = 4 × __ | 32 + 12 + 44 = (32 + __) + 44 |
| 26 + 39 + 3 = (26 + __) + 3 | 41 × 7 = 7 × __ |
| 42 × 3 = 3 × __ | 12 + 41 = 41 + __ |
| 96 × 9 = (100 - __) × 9 | 95 × 9 = (100 - __) × 9 |
| 95 + 82 = 82 + __ | (8 + 15) × 5 = 40 + __ |
四年级下册 运算律（笔算）（答案）
姓名：_______________
学号：_______________
用时：_______________
| 91 × 9 = 9 × __ 91 | 51 + 69 = 69 + __ 51 |
| 98 × 6 = (100 - __) × 6 2 | 96 × 8 = (100 - __) × 8 4 |
| 20 + 66 = 66 + __ 20 | (5 + 9) × 9 = 45 + __ 81 |
| (20 + 1) × 8 = 160 + __ 8 | 54 + 38 = 38 + __ 54 |
| 89 + 76 = 76 + __ 89 | 14 + 5 + 28 = (14 + __) + 28 5 |
| 34 + 16 + 12 = (34 + __) + 12 16 | 42 + 76 = 76 + __ 42 |
| 95 × 5 = 100 × 5 - __ × 5 5 | 51 × 6 = 6 × __ 51 |
| 27 × 8 = 8 × __ 27 | 49 + 49 + 49 = (49 + __) + 49 49 |
| 29 × 8 = 8 × __ 29 | 95 × 6 = (100 - __) × 6 5 |
| 98 × 7 = (100 - __) × 7 2 | 62 × 5 = 5 × __ 62 |
| 86 + 84 = 84 + __ 86 | (9 + 17) × 7 = 63 + __ 119 |
| 6 + 29 + 35 = (6 + __) + 35 29 | (7 + 9) × 5 = 35 + __ 45 |
| 28 + 40 + 28 = (28 + __) + 28 40 | 22 + 32 + 34 = (22 + __) + 34 32 |
| 28 × 4 = 4 × __ 28 | 32 + 12 + 44 = (32 + __) + 44 12 |
| 26 + 39 + 3 = (26 + __) + 3 39 | 41 × 7 = 7 × __ 41 |
| 42 × 3 = 3 × __ 42 | 12 + 41 = 41 + __ 12 |
| 96 × 9 = (100 - __) × 9 4 | 95 × 9 = (100 - __) × 9 5 |
| 95 + 82 = 82 + __ 95 | (8 + 15) × 5 = 40 + __ 75 |