四年级下册 运算律（笔算）
姓名：_______________
学号：_______________
用时：_______________
| 17 + 90 = 90 + __ | 2 × 8 = 8 × __ |
| (5 + 16) × 2 = 10 + __ | 57 + 78 = 78 + __ |
| 96 × 8 = (100 - __) × 8 | 18 + 2 + 20 = (18 + __) + 20 |
| 96 + 96 = 96 + __ | 29 × 8 = 8 × __ |
| (9 + 14) × 2 = 18 + __ | 92 × 8 = 8 × __ |
| 17 + 2 + 48 = (17 + __) + 48 | 10 + 21 = 21 + __ |
| 37 + 55 = 55 + __ | (16 + 13) × 6 = 96 + __ |
| 15 × 7 = 7 × __ | 97 × 5 = 100 × 5 - __ × 5 |
| (15 + 10) × 5 = 75 + __ | 60 × 5 = 5 × __ |
| 29 + 43 + 36 = (29 + __) + 36 | 41 × 2 = 2 × __ |
| 96 × 9 = (100 - __) × 9 | 27 + 44 = 44 + __ |
| 68 × 2 = 2 × __ | 2 + 5 + 22 = (2 + __) + 22 |
| 99 × 5 = (100 - __) × 5 | (4 + 3) × 8 = 32 + __ |
| (9 + 19) × 8 = 72 + __ | 28 + 34 = 34 + __ |
| (4 + 6) × 9 = 36 + __ | 97 × 8 = 100 × 8 - __ × 8 |
| 24 + 21 + 27 = (24 + __) + 27 | (4 + 4) × 4 = 16 + __ |
| 84 + 65 = 65 + __ | 98 × 3 = (100 - __) × 3 |
| 88 × 3 = 3 × __ | 98 × 6 = 6 × __ |
四年级下册 运算律（笔算）（答案）
姓名：_______________
学号：_______________
用时：_______________
| 17 + 90 = 90 + __ 17 | 2 × 8 = 8 × __ 2 |
| (5 + 16) × 2 = 10 + __ 32 | 57 + 78 = 78 + __ 57 |
| 96 × 8 = (100 - __) × 8 4 | 18 + 2 + 20 = (18 + __) + 20 2 |
| 96 + 96 = 96 + __ 96 | 29 × 8 = 8 × __ 29 |
| (9 + 14) × 2 = 18 + __ 28 | 92 × 8 = 8 × __ 92 |
| 17 + 2 + 48 = (17 + __) + 48 2 | 10 + 21 = 21 + __ 10 |
| 37 + 55 = 55 + __ 37 | (16 + 13) × 6 = 96 + __ 78 |
| 15 × 7 = 7 × __ 15 | 97 × 5 = 100 × 5 - __ × 5 3 |
| (15 + 10) × 5 = 75 + __ 50 | 60 × 5 = 5 × __ 60 |
| 29 + 43 + 36 = (29 + __) + 36 43 | 41 × 2 = 2 × __ 41 |
| 96 × 9 = (100 - __) × 9 4 | 27 + 44 = 44 + __ 27 |
| 68 × 2 = 2 × __ 68 | 2 + 5 + 22 = (2 + __) + 22 5 |
| 99 × 5 = (100 - __) × 5 1 | (4 + 3) × 8 = 32 + __ 24 |
| (9 + 19) × 8 = 72 + __ 152 | 28 + 34 = 34 + __ 28 |
| (4 + 6) × 9 = 36 + __ 54 | 97 × 8 = 100 × 8 - __ × 8 3 |
| 24 + 21 + 27 = (24 + __) + 27 21 | (4 + 4) × 4 = 16 + __ 16 |
| 84 + 65 = 65 + __ 84 | 98 × 3 = (100 - __) × 3 2 |
| 88 × 3 = 3 × __ 88 | 98 × 6 = 6 × __ 98 |