四年级下册 运算律（笔算）
姓名：_______________
学号：_______________
用时：_______________
| 72 + 36 = 36 + __ | (10 + 3) × 3 = 30 + __ |
| 14 + 26 + 9 = (14 + __) + 9 | 89 + 85 = 85 + __ |
| 95 × 3 = 100 × 3 - __ × 3 | 38 + 29 = 29 + __ |
| 2 × 9 = 9 × __ | (2 + 14) × 7 = 14 + __ |
| 20 × 6 = 6 × __ | 95 × 6 = (100 - __) × 6 |
| (20 + 12) × 4 = 80 + __ | 1 + 12 + 21 = (1 + __) + 21 |
| 23 + 3 + 42 = (23 + __) + 42 | 23 + 6 + 4 = (23 + __) + 4 |
| 10 + 31 + 28 = (10 + __) + 28 | 60 × 9 = 9 × __ |
| 18 + 15 + 8 = (18 + __) + 8 | (9 + 4) × 8 = 72 + __ |
| 39 + 37 + 6 = (39 + __) + 6 | 70 × 7 = 7 × __ |
| (1 + 4) × 3 = 3 + __ | 96 × 3 = 100 × 3 - __ × 3 |
| 96 × 7 = 100 × 7 - __ × 7 | 49 + 84 = 84 + __ |
| (18 + 9) × 4 = 72 + __ | 34 + 46 = 46 + __ |
| 50 + 6 + 28 = (50 + __) + 28 | 26 + 33 + 40 = (26 + __) + 40 |
| 38 × 4 = 4 × __ | (12 + 7) × 3 = 36 + __ |
| 48 × 2 = 2 × __ | 98 × 9 = 9 × __ |
| 13 + 39 = 39 + __ | 68 + 19 = 19 + __ |
| 88 + 61 = 61 + __ | 29 + 50 = 50 + __ |
四年级下册 运算律（笔算）（答案）
姓名：_______________
学号：_______________
用时：_______________
| 72 + 36 = 36 + __ 72 | (10 + 3) × 3 = 30 + __ 9 |
| 14 + 26 + 9 = (14 + __) + 9 26 | 89 + 85 = 85 + __ 89 |
| 95 × 3 = 100 × 3 - __ × 3 5 | 38 + 29 = 29 + __ 38 |
| 2 × 9 = 9 × __ 2 | (2 + 14) × 7 = 14 + __ 98 |
| 20 × 6 = 6 × __ 20 | 95 × 6 = (100 - __) × 6 5 |
| (20 + 12) × 4 = 80 + __ 48 | 1 + 12 + 21 = (1 + __) + 21 12 |
| 23 + 3 + 42 = (23 + __) + 42 3 | 23 + 6 + 4 = (23 + __) + 4 6 |
| 10 + 31 + 28 = (10 + __) + 28 31 | 60 × 9 = 9 × __ 60 |
| 18 + 15 + 8 = (18 + __) + 8 15 | (9 + 4) × 8 = 72 + __ 32 |
| 39 + 37 + 6 = (39 + __) + 6 37 | 70 × 7 = 7 × __ 70 |
| (1 + 4) × 3 = 3 + __ 12 | 96 × 3 = 100 × 3 - __ × 3 4 |
| 96 × 7 = 100 × 7 - __ × 7 4 | 49 + 84 = 84 + __ 49 |
| (18 + 9) × 4 = 72 + __ 36 | 34 + 46 = 46 + __ 34 |
| 50 + 6 + 28 = (50 + __) + 28 6 | 26 + 33 + 40 = (26 + __) + 40 33 |
| 38 × 4 = 4 × __ 38 | (12 + 7) × 3 = 36 + __ 21 |
| 48 × 2 = 2 × __ 48 | 98 × 9 = 9 × __ 98 |
| 13 + 39 = 39 + __ 13 | 68 + 19 = 19 + __ 68 |
| 88 + 61 = 61 + __ 88 | 29 + 50 = 50 + __ 29 |