四年级下册 运算律（笔算）
姓名：_______________
学号：_______________
用时：_______________
| 12 + 16 + 19 = (12 + __) + 19 | 34 × 9 = 9 × __ |
| 9 × 8 = 8 × __ | 43 + 41 = 41 + __ |
| 24 + 80 = 80 + __ | 97 + 48 = 48 + __ |
| 39 + 76 = 76 + __ | 8 + 28 + 5 = (8 + __) + 5 |
| (15 + 13) × 4 = 60 + __ | 23 × 5 = 5 × __ |
| 47 + 38 + 24 = (47 + __) + 24 | 99 × 3 = (100 - __) × 3 |
| (6 + 4) × 4 = 24 + __ | 96 × 5 = (100 - __) × 5 |
| 96 × 2 = (100 - __) × 2 | (19 + 18) × 2 = 38 + __ |
| 73 × 7 = 7 × __ | (1 + 1) × 6 = 6 + __ |
| 17 + 1 + 42 = (17 + __) + 42 | 93 × 2 = 2 × __ |
| 99 × 9 = 100 × 9 - __ × 9 | 99 × 4 = (100 - __) × 4 |
| 3 + 30 + 11 = (3 + __) + 11 | 67 + 52 = 52 + __ |
| 14 × 6 = 6 × __ | 49 × 8 = 8 × __ |
| 97 × 3 = 100 × 3 - __ × 3 | 87 + 71 = 71 + __ |
| (16 + 2) × 8 = 128 + __ | 46 + 54 = 54 + __ |
| (7 + 14) × 8 = 56 + __ | 96 × 2 = 100 × 2 - __ × 2 |
| 96 × 6 = 6 × __ | 13 × 4 = 4 × __ |
| 60 + 51 = 51 + __ | 98 × 5 = 100 × 5 - __ × 5 |
四年级下册 运算律（笔算）（答案）
姓名：_______________
学号：_______________
用时：_______________
| 12 + 16 + 19 = (12 + __) + 19 16 | 34 × 9 = 9 × __ 34 |
| 9 × 8 = 8 × __ 9 | 43 + 41 = 41 + __ 43 |
| 24 + 80 = 80 + __ 24 | 97 + 48 = 48 + __ 97 |
| 39 + 76 = 76 + __ 39 | 8 + 28 + 5 = (8 + __) + 5 28 |
| (15 + 13) × 4 = 60 + __ 52 | 23 × 5 = 5 × __ 23 |
| 47 + 38 + 24 = (47 + __) + 24 38 | 99 × 3 = (100 - __) × 3 1 |
| (6 + 4) × 4 = 24 + __ 16 | 96 × 5 = (100 - __) × 5 4 |
| 96 × 2 = (100 - __) × 2 4 | (19 + 18) × 2 = 38 + __ 36 |
| 73 × 7 = 7 × __ 73 | (1 + 1) × 6 = 6 + __ 6 |
| 17 + 1 + 42 = (17 + __) + 42 1 | 93 × 2 = 2 × __ 93 |
| 99 × 9 = 100 × 9 - __ × 9 1 | 99 × 4 = (100 - __) × 4 1 |
| 3 + 30 + 11 = (3 + __) + 11 30 | 67 + 52 = 52 + __ 67 |
| 14 × 6 = 6 × __ 14 | 49 × 8 = 8 × __ 49 |
| 97 × 3 = 100 × 3 - __ × 3 3 | 87 + 71 = 71 + __ 87 |
| (16 + 2) × 8 = 128 + __ 16 | 46 + 54 = 54 + __ 46 |
| (7 + 14) × 8 = 56 + __ 112 | 96 × 2 = 100 × 2 - __ × 2 4 |
| 96 × 6 = 6 × __ 96 | 13 × 4 = 4 × __ 13 |
| 60 + 51 = 51 + __ 60 | 98 × 5 = 100 × 5 - __ × 5 2 |