四年级下册 运算律（笔算）
姓名：_______________
学号：_______________
用时：_______________
| 46 × 4 = 4 × __ | 21 + 26 + 45 = (21 + __) + 45 |
| 16 + 1 + 37 = (16 + __) + 37 | (16 + 3) × 8 = 128 + __ |
| (19 + 18) × 2 = 38 + __ | 45 + 15 + 36 = (45 + __) + 36 |
| 97 × 8 = 100 × 8 - __ × 8 | 98 × 7 = (100 - __) × 7 |
| 95 × 7 = (100 - __) × 7 | 96 × 2 = (100 - __) × 2 |
| 32 + 11 = 11 + __ | 8 + 46 + 28 = (8 + __) + 28 |
| 14 + 36 = 36 + __ | 11 × 2 = 2 × __ |
| 14 + 68 = 68 + __ | (15 + 8) × 4 = 60 + __ |
| 99 × 9 = 100 × 9 - __ × 9 | 22 + 62 = 62 + __ |
| 29 + 5 + 18 = (29 + __) + 18 | 72 + 41 = 41 + __ |
| 16 + 98 = 98 + __ | 18 × 9 = 9 × __ |
| (20 + 6) × 5 = 100 + __ | 32 + 31 + 12 = (32 + __) + 12 |
| 95 × 7 = 100 × 7 - __ × 7 | 24 × 3 = 3 × __ |
| 5 × 4 = 4 × __ | (2 + 14) × 9 = 18 + __ |
| 99 × 9 = 100 × 9 - __ × 9 | 81 + 79 = 79 + __ |
| 43 × 4 = 4 × __ | 85 × 5 = 5 × __ |
| 49 + 50 + 38 = (49 + __) + 38 | (2 + 2) × 9 = 18 + __ |
| 95 × 9 = (100 - __) × 9 | (10 + 17) × 8 = 80 + __ |
四年级下册 运算律（笔算）（答案）
姓名：_______________
学号：_______________
用时：_______________
| 46 × 4 = 4 × __ 46 | 21 + 26 + 45 = (21 + __) + 45 26 |
| 16 + 1 + 37 = (16 + __) + 37 1 | (16 + 3) × 8 = 128 + __ 24 |
| (19 + 18) × 2 = 38 + __ 36 | 45 + 15 + 36 = (45 + __) + 36 15 |
| 97 × 8 = 100 × 8 - __ × 8 3 | 98 × 7 = (100 - __) × 7 2 |
| 95 × 7 = (100 - __) × 7 5 | 96 × 2 = (100 - __) × 2 4 |
| 32 + 11 = 11 + __ 32 | 8 + 46 + 28 = (8 + __) + 28 46 |
| 14 + 36 = 36 + __ 14 | 11 × 2 = 2 × __ 11 |
| 14 + 68 = 68 + __ 14 | (15 + 8) × 4 = 60 + __ 32 |
| 99 × 9 = 100 × 9 - __ × 9 1 | 22 + 62 = 62 + __ 22 |
| 29 + 5 + 18 = (29 + __) + 18 5 | 72 + 41 = 41 + __ 72 |
| 16 + 98 = 98 + __ 16 | 18 × 9 = 9 × __ 18 |
| (20 + 6) × 5 = 100 + __ 30 | 32 + 31 + 12 = (32 + __) + 12 31 |
| 95 × 7 = 100 × 7 - __ × 7 5 | 24 × 3 = 3 × __ 24 |
| 5 × 4 = 4 × __ 5 | (2 + 14) × 9 = 18 + __ 126 |
| 99 × 9 = 100 × 9 - __ × 9 1 | 81 + 79 = 79 + __ 81 |
| 43 × 4 = 4 × __ 43 | 85 × 5 = 5 × __ 85 |
| 49 + 50 + 38 = (49 + __) + 38 50 | (2 + 2) × 9 = 18 + __ 18 |
| 95 × 9 = (100 - __) × 9 5 | (10 + 17) × 8 = 80 + __ 136 |