四年级下册 运算律（笔算）
姓名：_______________
学号：_______________
用时：_______________
| 70 × 9 = 9 × __ | 32 × 9 = 9 × __ |
| 12 × 5 = 5 × __ | 11 + 32 + 43 = (11 + __) + 43 |
| 99 × 7 = (100 - __) × 7 | 63 + 74 = 74 + __ |
| 96 × 8 = 100 × 8 - __ × 8 | 63 + 44 = 44 + __ |
| 87 + 88 = 88 + __ | 76 × 8 = 8 × __ |
| 65 + 55 = 55 + __ | (1 + 6) × 3 = 3 + __ |
| 29 + 25 + 16 = (29 + __) + 16 | (18 + 16) × 6 = 108 + __ |
| 98 × 3 = 100 × 3 - __ × 3 | 97 × 4 = (100 - __) × 4 |
| 86 + 66 = 66 + __ | 99 × 2 = 100 × 2 - __ × 2 |
| (13 + 19) × 3 = 39 + __ | 50 × 7 = 7 × __ |
| (10 + 16) × 3 = 30 + __ | (11 + 4) × 3 = 33 + __ |
| (11 + 14) × 4 = 44 + __ | 25 × 2 = 2 × __ |
| 99 × 5 = (100 - __) × 5 | 64 + 21 = 21 + __ |
| 64 + 78 = 78 + __ | 98 × 9 = (100 - __) × 9 |
| (3 + 19) × 8 = 24 + __ | 80 + 26 = 26 + __ |
| 71 × 7 = 7 × __ | 32 + 25 + 37 = (32 + __) + 37 |
| 78 + 84 = 84 + __ | 31 + 23 + 47 = (31 + __) + 47 |
| 97 × 2 = 100 × 2 - __ × 2 | (11 + 20) × 4 = 44 + __ |
四年级下册 运算律（笔算）（答案）
姓名：_______________
学号：_______________
用时：_______________
| 70 × 9 = 9 × __ 70 | 32 × 9 = 9 × __ 32 |
| 12 × 5 = 5 × __ 12 | 11 + 32 + 43 = (11 + __) + 43 32 |
| 99 × 7 = (100 - __) × 7 1 | 63 + 74 = 74 + __ 63 |
| 96 × 8 = 100 × 8 - __ × 8 4 | 63 + 44 = 44 + __ 63 |
| 87 + 88 = 88 + __ 87 | 76 × 8 = 8 × __ 76 |
| 65 + 55 = 55 + __ 65 | (1 + 6) × 3 = 3 + __ 18 |
| 29 + 25 + 16 = (29 + __) + 16 25 | (18 + 16) × 6 = 108 + __ 96 |
| 98 × 3 = 100 × 3 - __ × 3 2 | 97 × 4 = (100 - __) × 4 3 |
| 86 + 66 = 66 + __ 86 | 99 × 2 = 100 × 2 - __ × 2 1 |
| (13 + 19) × 3 = 39 + __ 57 | 50 × 7 = 7 × __ 50 |
| (10 + 16) × 3 = 30 + __ 48 | (11 + 4) × 3 = 33 + __ 12 |
| (11 + 14) × 4 = 44 + __ 56 | 25 × 2 = 2 × __ 25 |
| 99 × 5 = (100 - __) × 5 1 | 64 + 21 = 21 + __ 64 |
| 64 + 78 = 78 + __ 64 | 98 × 9 = (100 - __) × 9 2 |
| (3 + 19) × 8 = 24 + __ 152 | 80 + 26 = 26 + __ 80 |
| 71 × 7 = 7 × __ 71 | 32 + 25 + 37 = (32 + __) + 37 25 |
| 78 + 84 = 84 + __ 78 | 31 + 23 + 47 = (31 + __) + 47 23 |
| 97 × 2 = 100 × 2 - __ × 2 3 | (11 + 20) × 4 = 44 + __ 80 |