四年级下册 运算律（笔算）
姓名：_______________
学号：_______________
用时：_______________
| 55 + 99 = 99 + __ | 15 + 89 = 89 + __ |
| 96 × 4 = 100 × 4 - __ × 4 | 19 + 29 + 3 = (19 + __) + 3 |
| (3 + 4) × 7 = 21 + __ | 97 × 2 = (100 - __) × 2 |
| 40 × 7 = 7 × __ | (15 + 4) × 2 = 30 + __ |
| 9 + 11 + 27 = (9 + __) + 27 | 11 × 2 = 2 × __ |
| 97 × 2 = (100 - __) × 2 | 20 + 29 = 29 + __ |
| (12 + 17) × 2 = 24 + __ | 36 + 78 = 78 + __ |
| 36 + 13 + 10 = (36 + __) + 10 | 69 × 6 = 6 × __ |
| 59 × 8 = 8 × __ | 72 + 46 = 46 + __ |
| (11 + 12) × 2 = 22 + __ | 11 + 27 + 44 = (11 + __) + 44 |
| 13 + 35 + 35 = (13 + __) + 35 | 96 × 3 = 3 × __ |
| 96 × 9 = 100 × 9 - __ × 9 | (20 + 10) × 2 = 40 + __ |
| 19 + 48 + 37 = (19 + __) + 37 | 99 × 6 = 100 × 6 - __ × 6 |
| 71 × 4 = 4 × __ | (3 + 4) × 7 = 21 + __ |
| 54 × 8 = 8 × __ | 79 × 3 = 3 × __ |
| (5 + 9) × 6 = 30 + __ | 99 × 2 = 2 × __ |
| (19 + 20) × 5 = 95 + __ | 12 + 38 + 44 = (12 + __) + 44 |
| 12 + 13 + 32 = (12 + __) + 32 | 67 + 18 = 18 + __ |
四年级下册 运算律（笔算）（答案）
姓名：_______________
学号：_______________
用时：_______________
| 55 + 99 = 99 + __ 55 | 15 + 89 = 89 + __ 15 |
| 96 × 4 = 100 × 4 - __ × 4 4 | 19 + 29 + 3 = (19 + __) + 3 29 |
| (3 + 4) × 7 = 21 + __ 28 | 97 × 2 = (100 - __) × 2 3 |
| 40 × 7 = 7 × __ 40 | (15 + 4) × 2 = 30 + __ 8 |
| 9 + 11 + 27 = (9 + __) + 27 11 | 11 × 2 = 2 × __ 11 |
| 97 × 2 = (100 - __) × 2 3 | 20 + 29 = 29 + __ 20 |
| (12 + 17) × 2 = 24 + __ 34 | 36 + 78 = 78 + __ 36 |
| 36 + 13 + 10 = (36 + __) + 10 13 | 69 × 6 = 6 × __ 69 |
| 59 × 8 = 8 × __ 59 | 72 + 46 = 46 + __ 72 |
| (11 + 12) × 2 = 22 + __ 24 | 11 + 27 + 44 = (11 + __) + 44 27 |
| 13 + 35 + 35 = (13 + __) + 35 35 | 96 × 3 = 3 × __ 96 |
| 96 × 9 = 100 × 9 - __ × 9 4 | (20 + 10) × 2 = 40 + __ 20 |
| 19 + 48 + 37 = (19 + __) + 37 48 | 99 × 6 = 100 × 6 - __ × 6 1 |
| 71 × 4 = 4 × __ 71 | (3 + 4) × 7 = 21 + __ 28 |
| 54 × 8 = 8 × __ 54 | 79 × 3 = 3 × __ 79 |
| (5 + 9) × 6 = 30 + __ 54 | 99 × 2 = 2 × __ 99 |
| (19 + 20) × 5 = 95 + __ 100 | 12 + 38 + 44 = (12 + __) + 44 38 |
| 12 + 13 + 32 = (12 + __) + 32 13 | 67 + 18 = 18 + __ 67 |