四年级下册 运算律（笔算）
姓名：_______________
学号：_______________
用时：_______________
| 38 × 9 = 9 × __ | 18 × 9 = 9 × __ |
| 98 × 9 = 100 × 9 - __ × 9 | 99 × 2 = (100 - __) × 2 |
| (4 + 4) × 8 = 32 + __ | 40 × 7 = 7 × __ |
| 48 × 2 = 2 × __ | 39 + 27 = 27 + __ |
| 12 + 7 + 1 = (12 + __) + 1 | 97 × 8 = (100 - __) × 8 |
| 1 + 9 + 43 = (1 + __) + 43 | 95 × 6 = 100 × 6 - __ × 6 |
| 76 + 45 = 45 + __ | (4 + 13) × 2 = 8 + __ |
| 32 + 33 + 28 = (32 + __) + 28 | 49 + 27 + 8 = (49 + __) + 8 |
| 24 × 7 = 7 × __ | (12 + 6) × 2 = 24 + __ |
| (20 + 17) × 4 = 80 + __ | 14 + 42 + 31 = (14 + __) + 31 |
| (1 + 18) × 7 = 7 + __ | 47 + 34 + 26 = (47 + __) + 26 |
| 17 + 58 = 58 + __ | (2 + 8) × 3 = 6 + __ |
| 2 + 6 + 38 = (2 + __) + 38 | (14 + 11) × 4 = 56 + __ |
| 30 × 7 = 7 × __ | 47 × 4 = 4 × __ |
| 32 × 4 = 4 × __ | 97 × 3 = 100 × 3 - __ × 3 |
| 34 + 90 = 90 + __ | 96 × 8 = (100 - __) × 8 |
| 12 + 41 + 38 = (12 + __) + 38 | 97 × 6 = 100 × 6 - __ × 6 |
| 95 × 5 = 100 × 5 - __ × 5 | 61 + 22 = 22 + __ |
四年级下册 运算律（笔算）（答案）
姓名：_______________
学号：_______________
用时：_______________
| 38 × 9 = 9 × __ 38 | 18 × 9 = 9 × __ 18 |
| 98 × 9 = 100 × 9 - __ × 9 2 | 99 × 2 = (100 - __) × 2 1 |
| (4 + 4) × 8 = 32 + __ 32 | 40 × 7 = 7 × __ 40 |
| 48 × 2 = 2 × __ 48 | 39 + 27 = 27 + __ 39 |
| 12 + 7 + 1 = (12 + __) + 1 7 | 97 × 8 = (100 - __) × 8 3 |
| 1 + 9 + 43 = (1 + __) + 43 9 | 95 × 6 = 100 × 6 - __ × 6 5 |
| 76 + 45 = 45 + __ 76 | (4 + 13) × 2 = 8 + __ 26 |
| 32 + 33 + 28 = (32 + __) + 28 33 | 49 + 27 + 8 = (49 + __) + 8 27 |
| 24 × 7 = 7 × __ 24 | (12 + 6) × 2 = 24 + __ 12 |
| (20 + 17) × 4 = 80 + __ 68 | 14 + 42 + 31 = (14 + __) + 31 42 |
| (1 + 18) × 7 = 7 + __ 126 | 47 + 34 + 26 = (47 + __) + 26 34 |
| 17 + 58 = 58 + __ 17 | (2 + 8) × 3 = 6 + __ 24 |
| 2 + 6 + 38 = (2 + __) + 38 6 | (14 + 11) × 4 = 56 + __ 44 |
| 30 × 7 = 7 × __ 30 | 47 × 4 = 4 × __ 47 |
| 32 × 4 = 4 × __ 32 | 97 × 3 = 100 × 3 - __ × 3 3 |
| 34 + 90 = 90 + __ 34 | 96 × 8 = (100 - __) × 8 4 |
| 12 + 41 + 38 = (12 + __) + 38 41 | 97 × 6 = 100 × 6 - __ × 6 3 |
| 95 × 5 = 100 × 5 - __ × 5 5 | 61 + 22 = 22 + __ 61 |