四年级下册 运算律（笔算）
姓名：_______________
学号：_______________
用时：_______________
| 83 + 11 = 11 + __ | 7 + 21 + 43 = (7 + __) + 43 |
| 96 × 9 = (100 - __) × 9 | (16 + 11) × 2 = 32 + __ |
| 17 + 2 + 15 = (17 + __) + 15 | 37 × 6 = 6 × __ |
| 99 × 2 = (100 - __) × 2 | 35 + 36 + 24 = (35 + __) + 24 |
| 14 + 58 = 58 + __ | 70 × 7 = 7 × __ |
| 99 × 2 = (100 - __) × 2 | (17 + 9) × 8 = 136 + __ |
| 97 × 9 = (100 - __) × 9 | 46 + 15 = 15 + __ |
| 96 × 6 = 100 × 6 - __ × 6 | (2 + 1) × 2 = 4 + __ |
| 96 × 8 = 100 × 8 - __ × 8 | 57 + 53 = 53 + __ |
| (15 + 17) × 8 = 120 + __ | (12 + 19) × 9 = 108 + __ |
| 96 × 5 = 100 × 5 - __ × 5 | 89 × 5 = 5 × __ |
| 75 + 73 = 73 + __ | 1 + 41 + 11 = (1 + __) + 11 |
| 82 + 22 = 22 + __ | (1 + 8) × 5 = 5 + __ |
| 11 + 5 + 23 = (11 + __) + 23 | 80 + 29 = 29 + __ |
| (20 + 14) × 2 = 40 + __ | (11 + 17) × 4 = 44 + __ |
| 99 × 2 = 100 × 2 - __ × 2 | 21 × 8 = 8 × __ |
| 63 × 9 = 9 × __ | 96 × 3 = 100 × 3 - __ × 3 |
| 40 + 43 + 30 = (40 + __) + 30 | 45 × 7 = 7 × __ |
四年级下册 运算律（笔算）（答案）
姓名：_______________
学号：_______________
用时：_______________
| 83 + 11 = 11 + __ 83 | 7 + 21 + 43 = (7 + __) + 43 21 |
| 96 × 9 = (100 - __) × 9 4 | (16 + 11) × 2 = 32 + __ 22 |
| 17 + 2 + 15 = (17 + __) + 15 2 | 37 × 6 = 6 × __ 37 |
| 99 × 2 = (100 - __) × 2 1 | 35 + 36 + 24 = (35 + __) + 24 36 |
| 14 + 58 = 58 + __ 14 | 70 × 7 = 7 × __ 70 |
| 99 × 2 = (100 - __) × 2 1 | (17 + 9) × 8 = 136 + __ 72 |
| 97 × 9 = (100 - __) × 9 3 | 46 + 15 = 15 + __ 46 |
| 96 × 6 = 100 × 6 - __ × 6 4 | (2 + 1) × 2 = 4 + __ 2 |
| 96 × 8 = 100 × 8 - __ × 8 4 | 57 + 53 = 53 + __ 57 |
| (15 + 17) × 8 = 120 + __ 136 | (12 + 19) × 9 = 108 + __ 171 |
| 96 × 5 = 100 × 5 - __ × 5 4 | 89 × 5 = 5 × __ 89 |
| 75 + 73 = 73 + __ 75 | 1 + 41 + 11 = (1 + __) + 11 41 |
| 82 + 22 = 22 + __ 82 | (1 + 8) × 5 = 5 + __ 40 |
| 11 + 5 + 23 = (11 + __) + 23 5 | 80 + 29 = 29 + __ 80 |
| (20 + 14) × 2 = 40 + __ 28 | (11 + 17) × 4 = 44 + __ 68 |
| 99 × 2 = 100 × 2 - __ × 2 1 | 21 × 8 = 8 × __ 21 |
| 63 × 9 = 9 × __ 63 | 96 × 3 = 100 × 3 - __ × 3 4 |
| 40 + 43 + 30 = (40 + __) + 30 43 | 45 × 7 = 7 × __ 45 |