四年级下册 运算律（笔算）
姓名：_______________
学号：_______________
用时：_______________
| 99 × 2 = 100 × 2 - __ × 2 | 38 + 13 = 13 + __ |
| 81 + 29 = 29 + __ | 53 + 48 = 48 + __ |
| 74 × 2 = 2 × __ | 29 × 2 = 2 × __ |
| (17 + 9) × 5 = 85 + __ | (11 + 6) × 3 = 33 + __ |
| 8 + 34 + 37 = (8 + __) + 37 | 69 + 47 = 47 + __ |
| 15 + 21 + 5 = (15 + __) + 5 | 20 + 62 = 62 + __ |
| 28 + 18 + 9 = (28 + __) + 9 | 60 × 7 = 7 × __ |
| 98 × 4 = 100 × 4 - __ × 4 | (14 + 19) × 6 = 84 + __ |
| 96 + 45 = 45 + __ | 25 + 57 = 57 + __ |
| 97 × 4 = 100 × 4 - __ × 4 | 98 × 5 = (100 - __) × 5 |
| 47 + 40 + 44 = (47 + __) + 44 | (19 + 5) × 2 = 38 + __ |
| 85 × 4 = 4 × __ | (9 + 8) × 5 = 45 + __ |
| 99 × 8 = (100 - __) × 8 | 86 × 8 = 8 × __ |
| 10 + 18 + 45 = (10 + __) + 45 | 24 + 36 + 28 = (24 + __) + 28 |
| 98 × 3 = (100 - __) × 3 | 23 × 9 = 9 × __ |
| 47 + 76 = 76 + __ | 1 + 28 + 18 = (1 + __) + 18 |
| 45 + 20 + 32 = (45 + __) + 32 | 97 × 9 = (100 - __) × 9 |
| (10 + 9) × 4 = 40 + __ | 21 × 4 = 4 × __ |
四年级下册 运算律（笔算）（答案）
姓名：_______________
学号：_______________
用时：_______________
| 99 × 2 = 100 × 2 - __ × 2 1 | 38 + 13 = 13 + __ 38 |
| 81 + 29 = 29 + __ 81 | 53 + 48 = 48 + __ 53 |
| 74 × 2 = 2 × __ 74 | 29 × 2 = 2 × __ 29 |
| (17 + 9) × 5 = 85 + __ 45 | (11 + 6) × 3 = 33 + __ 18 |
| 8 + 34 + 37 = (8 + __) + 37 34 | 69 + 47 = 47 + __ 69 |
| 15 + 21 + 5 = (15 + __) + 5 21 | 20 + 62 = 62 + __ 20 |
| 28 + 18 + 9 = (28 + __) + 9 18 | 60 × 7 = 7 × __ 60 |
| 98 × 4 = 100 × 4 - __ × 4 2 | (14 + 19) × 6 = 84 + __ 114 |
| 96 + 45 = 45 + __ 96 | 25 + 57 = 57 + __ 25 |
| 97 × 4 = 100 × 4 - __ × 4 3 | 98 × 5 = (100 - __) × 5 2 |
| 47 + 40 + 44 = (47 + __) + 44 40 | (19 + 5) × 2 = 38 + __ 10 |
| 85 × 4 = 4 × __ 85 | (9 + 8) × 5 = 45 + __ 40 |
| 99 × 8 = (100 - __) × 8 1 | 86 × 8 = 8 × __ 86 |
| 10 + 18 + 45 = (10 + __) + 45 18 | 24 + 36 + 28 = (24 + __) + 28 36 |
| 98 × 3 = (100 - __) × 3 2 | 23 × 9 = 9 × __ 23 |
| 47 + 76 = 76 + __ 47 | 1 + 28 + 18 = (1 + __) + 18 28 |
| 45 + 20 + 32 = (45 + __) + 32 20 | 97 × 9 = (100 - __) × 9 3 |
| (10 + 9) × 4 = 40 + __ 36 | 21 × 4 = 4 × __ 21 |