四年级下册 运算律（笔算）
姓名：_______________
学号：_______________
用时：_______________
| 97 × 8 = (100 - __) × 8 | 10 + 84 = 84 + __ |
| 95 × 9 = (100 - __) × 9 | 20 × 8 = 8 × __ |
| 5 + 43 + 22 = (5 + __) + 22 | (4 + 9) × 7 = 28 + __ |
| 59 × 6 = 6 × __ | 96 × 8 = 100 × 8 - __ × 8 |
| 95 × 8 = (100 - __) × 8 | 31 + 18 + 29 = (31 + __) + 29 |
| 98 × 3 = 100 × 3 - __ × 3 | 96 × 6 = (100 - __) × 6 |
| 50 + 34 + 2 = (50 + __) + 2 | 99 × 3 = 100 × 3 - __ × 3 |
| (8 + 11) × 3 = 24 + __ | 99 × 7 = (100 - __) × 7 |
| 26 × 9 = 9 × __ | 54 + 87 = 87 + __ |
| (6 + 15) × 5 = 30 + __ | 30 + 84 = 84 + __ |
| 72 + 20 = 20 + __ | 39 + 34 + 11 = (39 + __) + 11 |
| 43 + 7 + 17 = (43 + __) + 17 | 25 + 6 + 49 = (25 + __) + 49 |
| 74 + 56 = 56 + __ | 82 × 4 = 4 × __ |
| (5 + 6) × 5 = 25 + __ | 68 × 2 = 2 × __ |
| (12 + 8) × 3 = 36 + __ | 46 + 44 = 44 + __ |
| 42 + 18 + 49 = (42 + __) + 49 | 7 + 9 + 18 = (7 + __) + 18 |
| 40 + 45 = 45 + __ | 74 + 98 = 98 + __ |
| (16 + 8) × 9 = 144 + __ | 30 + 31 + 2 = (30 + __) + 2 |
四年级下册 运算律（笔算）（答案）
姓名：_______________
学号：_______________
用时：_______________
| 97 × 8 = (100 - __) × 8 3 | 10 + 84 = 84 + __ 10 |
| 95 × 9 = (100 - __) × 9 5 | 20 × 8 = 8 × __ 20 |
| 5 + 43 + 22 = (5 + __) + 22 43 | (4 + 9) × 7 = 28 + __ 63 |
| 59 × 6 = 6 × __ 59 | 96 × 8 = 100 × 8 - __ × 8 4 |
| 95 × 8 = (100 - __) × 8 5 | 31 + 18 + 29 = (31 + __) + 29 18 |
| 98 × 3 = 100 × 3 - __ × 3 2 | 96 × 6 = (100 - __) × 6 4 |
| 50 + 34 + 2 = (50 + __) + 2 34 | 99 × 3 = 100 × 3 - __ × 3 1 |
| (8 + 11) × 3 = 24 + __ 33 | 99 × 7 = (100 - __) × 7 1 |
| 26 × 9 = 9 × __ 26 | 54 + 87 = 87 + __ 54 |
| (6 + 15) × 5 = 30 + __ 75 | 30 + 84 = 84 + __ 30 |
| 72 + 20 = 20 + __ 72 | 39 + 34 + 11 = (39 + __) + 11 34 |
| 43 + 7 + 17 = (43 + __) + 17 7 | 25 + 6 + 49 = (25 + __) + 49 6 |
| 74 + 56 = 56 + __ 74 | 82 × 4 = 4 × __ 82 |
| (5 + 6) × 5 = 25 + __ 30 | 68 × 2 = 2 × __ 68 |
| (12 + 8) × 3 = 36 + __ 24 | 46 + 44 = 44 + __ 46 |
| 42 + 18 + 49 = (42 + __) + 49 18 | 7 + 9 + 18 = (7 + __) + 18 9 |
| 40 + 45 = 45 + __ 40 | 74 + 98 = 98 + __ 74 |
| (16 + 8) × 9 = 144 + __ 72 | 30 + 31 + 2 = (30 + __) + 2 31 |