四年级下册 运算律（笔算）
姓名：_______________
学号：_______________
用时：_______________
| 19 × 9 = 9 × __ | (13 + 20) × 4 = 52 + __ |
| 17 + 31 + 4 = (17 + __) + 4 | 97 × 6 = 100 × 6 - __ × 6 |
| 97 × 3 = (100 - __) × 3 | 9 + 17 + 35 = (9 + __) + 35 |
| 32 × 2 = 2 × __ | 5 + 43 + 10 = (5 + __) + 10 |
| 98 × 8 = (100 - __) × 8 | 40 + 16 = 16 + __ |
| 69 × 6 = 6 × __ | 75 + 43 = 43 + __ |
| (8 + 13) × 7 = 56 + __ | 58 + 31 = 31 + __ |
| 37 + 31 + 32 = (37 + __) + 32 | (17 + 3) × 2 = 34 + __ |
| 76 + 47 = 47 + __ | 59 × 8 = 8 × __ |
| 98 × 9 = 100 × 9 - __ × 9 | 95 × 9 = 9 × __ |
| 45 + 31 = 31 + __ | 57 + 15 = 15 + __ |
| 99 × 5 = 100 × 5 - __ × 5 | 98 × 2 = 100 × 2 - __ × 2 |
| (14 + 2) × 2 = 28 + __ | 13 × 2 = 2 × __ |
| 99 × 4 = (100 - __) × 4 | 95 × 4 = (100 - __) × 4 |
| 98 × 7 = (100 - __) × 7 | 46 + 10 + 41 = (46 + __) + 41 |
| 1 + 25 + 33 = (1 + __) + 33 | 60 × 5 = 5 × __ |
| (1 + 4) × 9 = 9 + __ | 23 + 4 + 1 = (23 + __) + 1 |
| 98 + 17 = 17 + __ | 96 × 2 = (100 - __) × 2 |
四年级下册 运算律（笔算）（答案）
姓名：_______________
学号：_______________
用时：_______________
| 19 × 9 = 9 × __ 19 | (13 + 20) × 4 = 52 + __ 80 |
| 17 + 31 + 4 = (17 + __) + 4 31 | 97 × 6 = 100 × 6 - __ × 6 3 |
| 97 × 3 = (100 - __) × 3 3 | 9 + 17 + 35 = (9 + __) + 35 17 |
| 32 × 2 = 2 × __ 32 | 5 + 43 + 10 = (5 + __) + 10 43 |
| 98 × 8 = (100 - __) × 8 2 | 40 + 16 = 16 + __ 40 |
| 69 × 6 = 6 × __ 69 | 75 + 43 = 43 + __ 75 |
| (8 + 13) × 7 = 56 + __ 91 | 58 + 31 = 31 + __ 58 |
| 37 + 31 + 32 = (37 + __) + 32 31 | (17 + 3) × 2 = 34 + __ 6 |
| 76 + 47 = 47 + __ 76 | 59 × 8 = 8 × __ 59 |
| 98 × 9 = 100 × 9 - __ × 9 2 | 95 × 9 = 9 × __ 95 |
| 45 + 31 = 31 + __ 45 | 57 + 15 = 15 + __ 57 |
| 99 × 5 = 100 × 5 - __ × 5 1 | 98 × 2 = 100 × 2 - __ × 2 2 |
| (14 + 2) × 2 = 28 + __ 4 | 13 × 2 = 2 × __ 13 |
| 99 × 4 = (100 - __) × 4 1 | 95 × 4 = (100 - __) × 4 5 |
| 98 × 7 = (100 - __) × 7 2 | 46 + 10 + 41 = (46 + __) + 41 10 |
| 1 + 25 + 33 = (1 + __) + 33 25 | 60 × 5 = 5 × __ 60 |
| (1 + 4) × 9 = 9 + __ 36 | 23 + 4 + 1 = (23 + __) + 1 4 |
| 98 + 17 = 17 + __ 98 | 96 × 2 = (100 - __) × 2 4 |