四年级下册 运算律（笔算）
姓名：_______________
学号：_______________
用时：_______________
| 98 × 3 = (100 - __) × 3 | 98 × 6 = (100 - __) × 6 |
| (8 + 15) × 2 = 16 + __ | 98 × 3 = 3 × __ |
| 36 + 64 = 64 + __ | 32 + 4 + 40 = (32 + __) + 40 |
| 14 + 27 + 2 = (14 + __) + 2 | 14 + 40 = 40 + __ |
| (2 + 7) × 3 = 6 + __ | 32 + 27 + 28 = (32 + __) + 28 |
| 68 + 31 = 31 + __ | 82 + 52 = 52 + __ |
| 99 × 3 = (100 - __) × 3 | 11 + 31 = 31 + __ |
| (2 + 12) × 6 = 12 + __ | 95 × 4 = (100 - __) × 4 |
| 25 × 4 = 4 × __ | 3 + 31 + 37 = (3 + __) + 37 |
| 21 + 61 = 61 + __ | 98 × 6 = 100 × 6 - __ × 6 |
| 99 × 5 = (100 - __) × 5 | 20 + 74 = 74 + __ |
| 98 × 6 = 100 × 6 - __ × 6 | (9 + 4) × 7 = 63 + __ |
| (14 + 19) × 9 = 126 + __ | 32 × 7 = 7 × __ |
| 7 × 5 = 5 × __ | 3 + 24 + 22 = (3 + __) + 22 |
| 53 × 9 = 9 × __ | 38 + 86 = 86 + __ |
| 98 + 35 = 35 + __ | (2 + 2) × 3 = 6 + __ |
| 32 × 4 = 4 × __ | 79 + 78 = 78 + __ |
| (12 + 11) × 6 = 72 + __ | 80 × 9 = 9 × __ |
四年级下册 运算律（笔算）（答案）
姓名：_______________
学号：_______________
用时：_______________
| 98 × 3 = (100 - __) × 3 2 | 98 × 6 = (100 - __) × 6 2 |
| (8 + 15) × 2 = 16 + __ 30 | 98 × 3 = 3 × __ 98 |
| 36 + 64 = 64 + __ 36 | 32 + 4 + 40 = (32 + __) + 40 4 |
| 14 + 27 + 2 = (14 + __) + 2 27 | 14 + 40 = 40 + __ 14 |
| (2 + 7) × 3 = 6 + __ 21 | 32 + 27 + 28 = (32 + __) + 28 27 |
| 68 + 31 = 31 + __ 68 | 82 + 52 = 52 + __ 82 |
| 99 × 3 = (100 - __) × 3 1 | 11 + 31 = 31 + __ 11 |
| (2 + 12) × 6 = 12 + __ 72 | 95 × 4 = (100 - __) × 4 5 |
| 25 × 4 = 4 × __ 25 | 3 + 31 + 37 = (3 + __) + 37 31 |
| 21 + 61 = 61 + __ 21 | 98 × 6 = 100 × 6 - __ × 6 2 |
| 99 × 5 = (100 - __) × 5 1 | 20 + 74 = 74 + __ 20 |
| 98 × 6 = 100 × 6 - __ × 6 2 | (9 + 4) × 7 = 63 + __ 28 |
| (14 + 19) × 9 = 126 + __ 171 | 32 × 7 = 7 × __ 32 |
| 7 × 5 = 5 × __ 7 | 3 + 24 + 22 = (3 + __) + 22 24 |
| 53 × 9 = 9 × __ 53 | 38 + 86 = 86 + __ 38 |
| 98 + 35 = 35 + __ 98 | (2 + 2) × 3 = 6 + __ 6 |
| 32 × 4 = 4 × __ 32 | 79 + 78 = 78 + __ 79 |
| (12 + 11) × 6 = 72 + __ 66 | 80 × 9 = 9 × __ 80 |