四年级下册 运算律（笔算）
姓名：_______________
学号：_______________
用时：_______________
| 56 + 36 = 36 + __ | (12 + 7) × 6 = 72 + __ |
| 20 × 3 = 3 × __ | 20 + 43 + 24 = (20 + __) + 24 |
| 99 × 7 = 100 × 7 - __ × 7 | 49 + 88 = 88 + __ |
| (17 + 6) × 7 = 119 + __ | (12 + 9) × 4 = 48 + __ |
| 10 + 8 + 33 = (10 + __) + 33 | 99 × 6 = (100 - __) × 6 |
| 46 × 7 = 7 × __ | (5 + 20) × 5 = 25 + __ |
| 95 × 5 = 100 × 5 - __ × 5 | 68 + 48 = 48 + __ |
| 61 + 24 = 24 + __ | (20 + 20) × 7 = 140 + __ |
| 22 × 6 = 6 × __ | (3 + 15) × 8 = 24 + __ |
| 37 + 59 = 59 + __ | 12 × 4 = 4 × __ |
| 21 + 20 + 27 = (21 + __) + 27 | 70 × 7 = 7 × __ |
| 11 + 9 + 33 = (11 + __) + 33 | (18 + 16) × 9 = 162 + __ |
| 49 + 39 = 39 + __ | 1 + 32 + 1 = (1 + __) + 1 |
| 11 + 27 + 14 = (11 + __) + 14 | 43 + 42 = 42 + __ |
| 17 × 9 = 9 × __ | 5 + 38 + 30 = (5 + __) + 30 |
| 98 × 2 = (100 - __) × 2 | 95 × 9 = 100 × 9 - __ × 9 |
| (7 + 13) × 4 = 28 + __ | 87 + 30 = 30 + __ |
| 89 + 85 = 85 + __ | 81 × 4 = 4 × __ |
四年级下册 运算律（笔算）（答案）
姓名：_______________
学号：_______________
用时：_______________
| 56 + 36 = 36 + __ 56 | (12 + 7) × 6 = 72 + __ 42 |
| 20 × 3 = 3 × __ 20 | 20 + 43 + 24 = (20 + __) + 24 43 |
| 99 × 7 = 100 × 7 - __ × 7 1 | 49 + 88 = 88 + __ 49 |
| (17 + 6) × 7 = 119 + __ 42 | (12 + 9) × 4 = 48 + __ 36 |
| 10 + 8 + 33 = (10 + __) + 33 8 | 99 × 6 = (100 - __) × 6 1 |
| 46 × 7 = 7 × __ 46 | (5 + 20) × 5 = 25 + __ 100 |
| 95 × 5 = 100 × 5 - __ × 5 5 | 68 + 48 = 48 + __ 68 |
| 61 + 24 = 24 + __ 61 | (20 + 20) × 7 = 140 + __ 140 |
| 22 × 6 = 6 × __ 22 | (3 + 15) × 8 = 24 + __ 120 |
| 37 + 59 = 59 + __ 37 | 12 × 4 = 4 × __ 12 |
| 21 + 20 + 27 = (21 + __) + 27 20 | 70 × 7 = 7 × __ 70 |
| 11 + 9 + 33 = (11 + __) + 33 9 | (18 + 16) × 9 = 162 + __ 144 |
| 49 + 39 = 39 + __ 49 | 1 + 32 + 1 = (1 + __) + 1 32 |
| 11 + 27 + 14 = (11 + __) + 14 27 | 43 + 42 = 42 + __ 43 |
| 17 × 9 = 9 × __ 17 | 5 + 38 + 30 = (5 + __) + 30 38 |
| 98 × 2 = (100 - __) × 2 2 | 95 × 9 = 100 × 9 - __ × 9 5 |
| (7 + 13) × 4 = 28 + __ 52 | 87 + 30 = 30 + __ 87 |
| 89 + 85 = 85 + __ 89 | 81 × 4 = 4 × __ 81 |