四年级下册 运算律（笔算）
姓名：_______________
学号：_______________
用时：_______________
| 22 × 5 = 5 × __ | 42 + 52 = 52 + __ |
| 39 + 40 + 17 = (39 + __) + 17 | 73 + 76 = 76 + __ |
| (17 + 18) × 7 = 119 + __ | 15 × 3 = 3 × __ |
| 51 + 20 = 20 + __ | 95 × 3 = (100 - __) × 3 |
| 44 + 28 + 45 = (44 + __) + 45 | 96 × 9 = 100 × 9 - __ × 9 |
| 96 + 22 = 22 + __ | 82 + 39 = 39 + __ |
| (3 + 11) × 6 = 18 + __ | 19 + 1 + 34 = (19 + __) + 34 |
| (20 + 1) × 9 = 180 + __ | (12 + 18) × 9 = 108 + __ |
| 22 × 8 = 8 × __ | (1 + 15) × 5 = 5 + __ |
| 98 × 9 = (100 - __) × 9 | 24 + 10 = 10 + __ |
| (18 + 11) × 5 = 90 + __ | 3 + 19 + 42 = (3 + __) + 42 |
| 78 + 33 = 33 + __ | 96 × 7 = 100 × 7 - __ × 7 |
| 99 × 5 = (100 - __) × 5 | 37 + 9 + 12 = (37 + __) + 12 |
| 24 × 8 = 8 × __ | 39 + 93 = 93 + __ |
| 12 × 3 = 3 × __ | 17 × 9 = 9 × __ |
| 32 + 14 + 40 = (32 + __) + 40 | 18 × 9 = 9 × __ |
| 96 × 4 = (100 - __) × 4 | 16 + 37 = 37 + __ |
| (9 + 4) × 9 = 81 + __ | (8 + 14) × 7 = 56 + __ |
四年级下册 运算律（笔算）（答案）
姓名：_______________
学号：_______________
用时：_______________
| 22 × 5 = 5 × __ 22 | 42 + 52 = 52 + __ 42 |
| 39 + 40 + 17 = (39 + __) + 17 40 | 73 + 76 = 76 + __ 73 |
| (17 + 18) × 7 = 119 + __ 126 | 15 × 3 = 3 × __ 15 |
| 51 + 20 = 20 + __ 51 | 95 × 3 = (100 - __) × 3 5 |
| 44 + 28 + 45 = (44 + __) + 45 28 | 96 × 9 = 100 × 9 - __ × 9 4 |
| 96 + 22 = 22 + __ 96 | 82 + 39 = 39 + __ 82 |
| (3 + 11) × 6 = 18 + __ 66 | 19 + 1 + 34 = (19 + __) + 34 1 |
| (20 + 1) × 9 = 180 + __ 9 | (12 + 18) × 9 = 108 + __ 162 |
| 22 × 8 = 8 × __ 22 | (1 + 15) × 5 = 5 + __ 75 |
| 98 × 9 = (100 - __) × 9 2 | 24 + 10 = 10 + __ 24 |
| (18 + 11) × 5 = 90 + __ 55 | 3 + 19 + 42 = (3 + __) + 42 19 |
| 78 + 33 = 33 + __ 78 | 96 × 7 = 100 × 7 - __ × 7 4 |
| 99 × 5 = (100 - __) × 5 1 | 37 + 9 + 12 = (37 + __) + 12 9 |
| 24 × 8 = 8 × __ 24 | 39 + 93 = 93 + __ 39 |
| 12 × 3 = 3 × __ 12 | 17 × 9 = 9 × __ 17 |
| 32 + 14 + 40 = (32 + __) + 40 14 | 18 × 9 = 9 × __ 18 |
| 96 × 4 = (100 - __) × 4 4 | 16 + 37 = 37 + __ 16 |
| (9 + 4) × 9 = 81 + __ 36 | (8 + 14) × 7 = 56 + __ 98 |