四年级下册 运算律（笔算）
姓名：_______________
学号：_______________
用时：_______________
| 98 × 2 = 100 × 2 - __ × 2 | 98 × 3 = (100 - __) × 3 |
| 33 + 79 = 79 + __ | 99 × 9 = 100 × 9 - __ × 9 |
| (3 + 13) × 6 = 18 + __ | 47 × 3 = 3 × __ |
| 97 × 4 = (100 - __) × 4 | 94 × 5 = 5 × __ |
| 39 + 1 + 15 = (39 + __) + 15 | 24 + 52 = 52 + __ |
| 49 + 19 = 19 + __ | 95 + 64 = 64 + __ |
| 44 + 4 + 24 = (44 + __) + 24 | 84 × 4 = 4 × __ |
| 95 × 3 = (100 - __) × 3 | 39 + 11 + 29 = (39 + __) + 29 |
| 32 + 33 + 39 = (32 + __) + 39 | (7 + 18) × 8 = 56 + __ |
| 99 × 4 = 100 × 4 - __ × 4 | 46 × 8 = 8 × __ |
| 34 + 44 = 44 + __ | (2 + 4) × 9 = 18 + __ |
| 92 × 4 = 4 × __ | (10 + 7) × 7 = 70 + __ |
| (13 + 15) × 8 = 104 + __ | 13 + 3 + 50 = (13 + __) + 50 |
| 38 + 50 = 50 + __ | 18 + 84 = 84 + __ |
| 99 × 9 = (100 - __) × 9 | 43 + 43 = 43 + __ |
| 13 × 8 = 8 × __ | 49 + 20 + 23 = (49 + __) + 23 |
| (4 + 4) × 3 = 12 + __ | 62 + 67 = 67 + __ |
| (8 + 7) × 6 = 48 + __ | 91 × 3 = 3 × __ |
四年级下册 运算律（笔算）（答案）
姓名：_______________
学号：_______________
用时：_______________
| 98 × 2 = 100 × 2 - __ × 2 2 | 98 × 3 = (100 - __) × 3 2 |
| 33 + 79 = 79 + __ 33 | 99 × 9 = 100 × 9 - __ × 9 1 |
| (3 + 13) × 6 = 18 + __ 78 | 47 × 3 = 3 × __ 47 |
| 97 × 4 = (100 - __) × 4 3 | 94 × 5 = 5 × __ 94 |
| 39 + 1 + 15 = (39 + __) + 15 1 | 24 + 52 = 52 + __ 24 |
| 49 + 19 = 19 + __ 49 | 95 + 64 = 64 + __ 95 |
| 44 + 4 + 24 = (44 + __) + 24 4 | 84 × 4 = 4 × __ 84 |
| 95 × 3 = (100 - __) × 3 5 | 39 + 11 + 29 = (39 + __) + 29 11 |
| 32 + 33 + 39 = (32 + __) + 39 33 | (7 + 18) × 8 = 56 + __ 144 |
| 99 × 4 = 100 × 4 - __ × 4 1 | 46 × 8 = 8 × __ 46 |
| 34 + 44 = 44 + __ 34 | (2 + 4) × 9 = 18 + __ 36 |
| 92 × 4 = 4 × __ 92 | (10 + 7) × 7 = 70 + __ 49 |
| (13 + 15) × 8 = 104 + __ 120 | 13 + 3 + 50 = (13 + __) + 50 3 |
| 38 + 50 = 50 + __ 38 | 18 + 84 = 84 + __ 18 |
| 99 × 9 = (100 - __) × 9 1 | 43 + 43 = 43 + __ 43 |
| 13 × 8 = 8 × __ 13 | 49 + 20 + 23 = (49 + __) + 23 20 |
| (4 + 4) × 3 = 12 + __ 12 | 62 + 67 = 67 + __ 62 |
| (8 + 7) × 6 = 48 + __ 42 | 91 × 3 = 3 × __ 91 |