四年级下册 运算律（笔算）
姓名：_______________
学号：_______________
用时：_______________
| 39 + 11 = 11 + __ | 48 + 40 = 40 + __ |
| 96 × 8 = 100 × 8 - __ × 8 | 29 × 2 = 2 × __ |
| (12 + 7) × 2 = 24 + __ | 21 + 41 + 41 = (21 + __) + 41 |
| 97 × 5 = (100 - __) × 5 | 28 + 18 + 14 = (28 + __) + 14 |
| 12 + 6 + 26 = (12 + __) + 26 | 26 + 70 = 70 + __ |
| 16 + 59 = 59 + __ | 97 × 7 = 100 × 7 - __ × 7 |
| 13 + 64 = 64 + __ | 48 + 38 = 38 + __ |
| (4 + 2) × 8 = 32 + __ | (5 + 12) × 5 = 25 + __ |
| 96 × 6 = 6 × __ | 5 × 6 = 6 × __ |
| (5 + 11) × 5 = 25 + __ | (1 + 17) × 2 = 2 + __ |
| 81 × 2 = 2 × __ | (2 + 2) × 4 = 8 + __ |
| 98 × 4 = (100 - __) × 4 | 56 × 9 = 9 × __ |
| 17 × 4 = 4 × __ | 98 × 3 = (100 - __) × 3 |
| 16 + 21 + 8 = (16 + __) + 8 | 15 + 28 + 16 = (15 + __) + 16 |
| 49 + 18 + 33 = (49 + __) + 33 | 65 + 96 = 96 + __ |
| 96 × 2 = 100 × 2 - __ × 2 | 92 + 49 = 49 + __ |
| 37 × 8 = 8 × __ | 21 + 27 + 7 = (21 + __) + 7 |
| 47 + 47 + 8 = (47 + __) + 8 | (17 + 9) × 4 = 68 + __ |
四年级下册 运算律（笔算）（答案）
姓名：_______________
学号：_______________
用时：_______________
| 39 + 11 = 11 + __ 39 | 48 + 40 = 40 + __ 48 |
| 96 × 8 = 100 × 8 - __ × 8 4 | 29 × 2 = 2 × __ 29 |
| (12 + 7) × 2 = 24 + __ 14 | 21 + 41 + 41 = (21 + __) + 41 41 |
| 97 × 5 = (100 - __) × 5 3 | 28 + 18 + 14 = (28 + __) + 14 18 |
| 12 + 6 + 26 = (12 + __) + 26 6 | 26 + 70 = 70 + __ 26 |
| 16 + 59 = 59 + __ 16 | 97 × 7 = 100 × 7 - __ × 7 3 |
| 13 + 64 = 64 + __ 13 | 48 + 38 = 38 + __ 48 |
| (4 + 2) × 8 = 32 + __ 16 | (5 + 12) × 5 = 25 + __ 60 |
| 96 × 6 = 6 × __ 96 | 5 × 6 = 6 × __ 5 |
| (5 + 11) × 5 = 25 + __ 55 | (1 + 17) × 2 = 2 + __ 34 |
| 81 × 2 = 2 × __ 81 | (2 + 2) × 4 = 8 + __ 8 |
| 98 × 4 = (100 - __) × 4 2 | 56 × 9 = 9 × __ 56 |
| 17 × 4 = 4 × __ 17 | 98 × 3 = (100 - __) × 3 2 |
| 16 + 21 + 8 = (16 + __) + 8 21 | 15 + 28 + 16 = (15 + __) + 16 28 |
| 49 + 18 + 33 = (49 + __) + 33 18 | 65 + 96 = 96 + __ 65 |
| 96 × 2 = 100 × 2 - __ × 2 4 | 92 + 49 = 49 + __ 92 |
| 37 × 8 = 8 × __ 37 | 21 + 27 + 7 = (21 + __) + 7 27 |
| 47 + 47 + 8 = (47 + __) + 8 47 | (17 + 9) × 4 = 68 + __ 36 |