四年级下册 运算律（笔算）
姓名：_______________
学号：_______________
用时：_______________
| 19 + 3 + 48 = (19 + __) + 48 | 68 × 6 = 6 × __ |
| 40 + 27 + 39 = (40 + __) + 39 | (18 + 10) × 3 = 54 + __ |
| (10 + 14) × 5 = 50 + __ | (20 + 19) × 9 = 180 + __ |
| 97 × 9 = (100 - __) × 9 | 47 + 17 + 40 = (47 + __) + 40 |
| 65 + 94 = 94 + __ | 96 × 4 = 100 × 4 - __ × 4 |
| 95 × 9 = 100 × 9 - __ × 9 | 65 + 57 = 57 + __ |
| 23 + 53 = 53 + __ | 95 × 6 = 100 × 6 - __ × 6 |
| 99 × 3 = 100 × 3 - __ × 3 | 89 × 4 = 4 × __ |
| 19 + 33 + 14 = (19 + __) + 14 | 85 × 6 = 6 × __ |
| 32 + 27 + 49 = (32 + __) + 49 | 28 × 6 = 6 × __ |
| 41 + 57 = 57 + __ | 98 × 9 = 100 × 9 - __ × 9 |
| 51 × 7 = 7 × __ | 98 × 8 = (100 - __) × 8 |
| 24 + 99 = 99 + __ | 60 + 61 = 61 + __ |
| (4 + 7) × 4 = 16 + __ | 96 × 2 = 100 × 2 - __ × 2 |
| 50 + 14 + 11 = (50 + __) + 11 | 25 + 66 = 66 + __ |
| (15 + 14) × 8 = 120 + __ | (6 + 11) × 5 = 30 + __ |
| 22 + 30 + 45 = (22 + __) + 45 | 54 + 82 = 82 + __ |
| 29 × 7 = 7 × __ | (12 + 14) × 5 = 60 + __ |
四年级下册 运算律（笔算）（答案）
姓名：_______________
学号：_______________
用时：_______________
| 19 + 3 + 48 = (19 + __) + 48 3 | 68 × 6 = 6 × __ 68 |
| 40 + 27 + 39 = (40 + __) + 39 27 | (18 + 10) × 3 = 54 + __ 30 |
| (10 + 14) × 5 = 50 + __ 70 | (20 + 19) × 9 = 180 + __ 171 |
| 97 × 9 = (100 - __) × 9 3 | 47 + 17 + 40 = (47 + __) + 40 17 |
| 65 + 94 = 94 + __ 65 | 96 × 4 = 100 × 4 - __ × 4 4 |
| 95 × 9 = 100 × 9 - __ × 9 5 | 65 + 57 = 57 + __ 65 |
| 23 + 53 = 53 + __ 23 | 95 × 6 = 100 × 6 - __ × 6 5 |
| 99 × 3 = 100 × 3 - __ × 3 1 | 89 × 4 = 4 × __ 89 |
| 19 + 33 + 14 = (19 + __) + 14 33 | 85 × 6 = 6 × __ 85 |
| 32 + 27 + 49 = (32 + __) + 49 27 | 28 × 6 = 6 × __ 28 |
| 41 + 57 = 57 + __ 41 | 98 × 9 = 100 × 9 - __ × 9 2 |
| 51 × 7 = 7 × __ 51 | 98 × 8 = (100 - __) × 8 2 |
| 24 + 99 = 99 + __ 24 | 60 + 61 = 61 + __ 60 |
| (4 + 7) × 4 = 16 + __ 28 | 96 × 2 = 100 × 2 - __ × 2 4 |
| 50 + 14 + 11 = (50 + __) + 11 14 | 25 + 66 = 66 + __ 25 |
| (15 + 14) × 8 = 120 + __ 112 | (6 + 11) × 5 = 30 + __ 55 |
| 22 + 30 + 45 = (22 + __) + 45 30 | 54 + 82 = 82 + __ 54 |
| 29 × 7 = 7 × __ 29 | (12 + 14) × 5 = 60 + __ 70 |