四年级下册 运算律（笔算）
姓名：_______________
学号：_______________
用时：_______________
| 80 × 9 = 9 × __ | 49 + 44 + 3 = (49 + __) + 3 |
| 30 + 19 + 32 = (30 + __) + 32 | 98 × 4 = (100 - __) × 4 |
| (11 + 13) × 6 = 66 + __ | 96 × 3 = (100 - __) × 3 |
| 98 × 8 = (100 - __) × 8 | (14 + 11) × 4 = 56 + __ |
| 64 + 63 = 63 + __ | 28 + 35 = 35 + __ |
| 61 + 75 = 75 + __ | 43 + 98 = 98 + __ |
| 96 × 2 = (100 - __) × 2 | 7 + 19 + 10 = (7 + __) + 10 |
| 20 + 15 + 11 = (20 + __) + 11 | 96 × 4 = 100 × 4 - __ × 4 |
| 24 × 5 = 5 × __ | 86 + 84 = 84 + __ |
| 90 × 3 = 3 × __ | 13 × 5 = 5 × __ |
| 97 × 6 = (100 - __) × 6 | 12 + 15 = 15 + __ |
| 78 + 45 = 45 + __ | 33 × 2 = 2 × __ |
| (9 + 5) × 2 = 18 + __ | 33 + 31 = 31 + __ |
| 45 + 4 + 17 = (45 + __) + 17 | (3 + 12) × 8 = 24 + __ |
| (1 + 10) × 7 = 7 + __ | 47 + 10 + 10 = (47 + __) + 10 |
| (8 + 4) × 2 = 16 + __ | 23 × 3 = 3 × __ |
| (8 + 15) × 9 = 72 + __ | 99 × 2 = 100 × 2 - __ × 2 |
| 19 + 4 + 48 = (19 + __) + 48 | (17 + 15) × 8 = 136 + __ |
四年级下册 运算律（笔算）（答案）
姓名：_______________
学号：_______________
用时：_______________
| 80 × 9 = 9 × __ 80 | 49 + 44 + 3 = (49 + __) + 3 44 |
| 30 + 19 + 32 = (30 + __) + 32 19 | 98 × 4 = (100 - __) × 4 2 |
| (11 + 13) × 6 = 66 + __ 78 | 96 × 3 = (100 - __) × 3 4 |
| 98 × 8 = (100 - __) × 8 2 | (14 + 11) × 4 = 56 + __ 44 |
| 64 + 63 = 63 + __ 64 | 28 + 35 = 35 + __ 28 |
| 61 + 75 = 75 + __ 61 | 43 + 98 = 98 + __ 43 |
| 96 × 2 = (100 - __) × 2 4 | 7 + 19 + 10 = (7 + __) + 10 19 |
| 20 + 15 + 11 = (20 + __) + 11 15 | 96 × 4 = 100 × 4 - __ × 4 4 |
| 24 × 5 = 5 × __ 24 | 86 + 84 = 84 + __ 86 |
| 90 × 3 = 3 × __ 90 | 13 × 5 = 5 × __ 13 |
| 97 × 6 = (100 - __) × 6 3 | 12 + 15 = 15 + __ 12 |
| 78 + 45 = 45 + __ 78 | 33 × 2 = 2 × __ 33 |
| (9 + 5) × 2 = 18 + __ 10 | 33 + 31 = 31 + __ 33 |
| 45 + 4 + 17 = (45 + __) + 17 4 | (3 + 12) × 8 = 24 + __ 96 |
| (1 + 10) × 7 = 7 + __ 70 | 47 + 10 + 10 = (47 + __) + 10 10 |
| (8 + 4) × 2 = 16 + __ 8 | 23 × 3 = 3 × __ 23 |
| (8 + 15) × 9 = 72 + __ 135 | 99 × 2 = 100 × 2 - __ × 2 1 |
| 19 + 4 + 48 = (19 + __) + 48 4 | (17 + 15) × 8 = 136 + __ 120 |