四年级下册 运算律（笔算）
姓名：_______________
学号：_______________
用时：_______________
| (15 + 7) × 6 = 90 + __ | 54 × 5 = 5 × __ |
| 7 + 30 + 38 = (7 + __) + 38 | (19 + 2) × 6 = 114 + __ |
| 48 + 36 + 10 = (48 + __) + 10 | 29 + 41 + 39 = (29 + __) + 39 |
| 97 × 5 = 100 × 5 - __ × 5 | 45 + 36 + 41 = (45 + __) + 41 |
| 81 + 80 = 80 + __ | (10 + 18) × 8 = 80 + __ |
| 96 × 5 = (100 - __) × 5 | 60 + 83 = 83 + __ |
| 54 × 8 = 8 × __ | 90 × 2 = 2 × __ |
| 55 + 27 = 27 + __ | (20 + 6) × 2 = 40 + __ |
| 99 × 3 = 100 × 3 - __ × 3 | 9 + 7 + 20 = (9 + __) + 20 |
| 99 × 3 = 100 × 3 - __ × 3 | 39 + 44 = 44 + __ |
| 34 + 94 = 94 + __ | 2 × 5 = 5 × __ |
| (16 + 1) × 3 = 48 + __ | 19 + 74 = 74 + __ |
| 2 × 2 = 2 × __ | 96 × 5 = 100 × 5 - __ × 5 |
| (3 + 12) × 3 = 9 + __ | 9 × 4 = 4 × __ |
| 13 + 74 = 74 + __ | 51 × 6 = 6 × __ |
| 99 × 6 = 100 × 6 - __ × 6 | 27 × 6 = 6 × __ |
| 96 × 8 = (100 - __) × 8 | 95 × 3 = (100 - __) × 3 |
| 99 × 7 = 100 × 7 - __ × 7 | 12 + 28 + 38 = (12 + __) + 38 |
四年级下册 运算律（笔算）（答案）
姓名：_______________
学号：_______________
用时：_______________
| (15 + 7) × 6 = 90 + __ 42 | 54 × 5 = 5 × __ 54 |
| 7 + 30 + 38 = (7 + __) + 38 30 | (19 + 2) × 6 = 114 + __ 12 |
| 48 + 36 + 10 = (48 + __) + 10 36 | 29 + 41 + 39 = (29 + __) + 39 41 |
| 97 × 5 = 100 × 5 - __ × 5 3 | 45 + 36 + 41 = (45 + __) + 41 36 |
| 81 + 80 = 80 + __ 81 | (10 + 18) × 8 = 80 + __ 144 |
| 96 × 5 = (100 - __) × 5 4 | 60 + 83 = 83 + __ 60 |
| 54 × 8 = 8 × __ 54 | 90 × 2 = 2 × __ 90 |
| 55 + 27 = 27 + __ 55 | (20 + 6) × 2 = 40 + __ 12 |
| 99 × 3 = 100 × 3 - __ × 3 1 | 9 + 7 + 20 = (9 + __) + 20 7 |
| 99 × 3 = 100 × 3 - __ × 3 1 | 39 + 44 = 44 + __ 39 |
| 34 + 94 = 94 + __ 34 | 2 × 5 = 5 × __ 2 |
| (16 + 1) × 3 = 48 + __ 3 | 19 + 74 = 74 + __ 19 |
| 2 × 2 = 2 × __ 2 | 96 × 5 = 100 × 5 - __ × 5 4 |
| (3 + 12) × 3 = 9 + __ 36 | 9 × 4 = 4 × __ 9 |
| 13 + 74 = 74 + __ 13 | 51 × 6 = 6 × __ 51 |
| 99 × 6 = 100 × 6 - __ × 6 1 | 27 × 6 = 6 × __ 27 |
| 96 × 8 = (100 - __) × 8 4 | 95 × 3 = (100 - __) × 3 5 |
| 99 × 7 = 100 × 7 - __ × 7 1 | 12 + 28 + 38 = (12 + __) + 38 28 |