四年级下册 运算律（笔算）
姓名：_______________
学号：_______________
用时：_______________
| 97 × 9 = 100 × 9 - __ × 9 | 29 × 5 = 5 × __ |
| (14 + 13) × 4 = 56 + __ | 55 × 8 = 8 × __ |
| 24 + 43 + 39 = (24 + __) + 39 | 61 × 4 = 4 × __ |
| (18 + 19) × 2 = 36 + __ | 33 × 4 = 4 × __ |
| 95 × 4 = (100 - __) × 4 | 93 × 7 = 7 × __ |
| 99 × 8 = (100 - __) × 8 | 95 × 6 = (100 - __) × 6 |
| (17 + 15) × 3 = 51 + __ | 47 + 23 + 47 = (47 + __) + 47 |
| 50 + 33 + 21 = (50 + __) + 21 | 21 + 38 + 16 = (21 + __) + 16 |
| 98 × 4 = 100 × 4 - __ × 4 | 37 + 30 + 22 = (37 + __) + 22 |
| 46 × 2 = 2 × __ | 99 × 2 = 100 × 2 - __ × 2 |
| 26 + 29 + 5 = (26 + __) + 5 | 82 + 96 = 96 + __ |
| (19 + 6) × 7 = 133 + __ | 22 × 9 = 9 × __ |
| 22 + 1 + 27 = (22 + __) + 27 | (19 + 12) × 5 = 95 + __ |
| 82 + 54 = 54 + __ | 69 × 2 = 2 × __ |
| (12 + 9) × 2 = 24 + __ | 92 + 57 = 57 + __ |
| 62 + 55 = 55 + __ | 38 + 40 = 40 + __ |
| 97 × 7 = 100 × 7 - __ × 7 | 92 × 5 = 5 × __ |
| 21 × 8 = 8 × __ | 95 + 74 = 74 + __ |
四年级下册 运算律（笔算）（答案）
姓名：_______________
学号：_______________
用时：_______________
| 97 × 9 = 100 × 9 - __ × 9 3 | 29 × 5 = 5 × __ 29 |
| (14 + 13) × 4 = 56 + __ 52 | 55 × 8 = 8 × __ 55 |
| 24 + 43 + 39 = (24 + __) + 39 43 | 61 × 4 = 4 × __ 61 |
| (18 + 19) × 2 = 36 + __ 38 | 33 × 4 = 4 × __ 33 |
| 95 × 4 = (100 - __) × 4 5 | 93 × 7 = 7 × __ 93 |
| 99 × 8 = (100 - __) × 8 1 | 95 × 6 = (100 - __) × 6 5 |
| (17 + 15) × 3 = 51 + __ 45 | 47 + 23 + 47 = (47 + __) + 47 23 |
| 50 + 33 + 21 = (50 + __) + 21 33 | 21 + 38 + 16 = (21 + __) + 16 38 |
| 98 × 4 = 100 × 4 - __ × 4 2 | 37 + 30 + 22 = (37 + __) + 22 30 |
| 46 × 2 = 2 × __ 46 | 99 × 2 = 100 × 2 - __ × 2 1 |
| 26 + 29 + 5 = (26 + __) + 5 29 | 82 + 96 = 96 + __ 82 |
| (19 + 6) × 7 = 133 + __ 42 | 22 × 9 = 9 × __ 22 |
| 22 + 1 + 27 = (22 + __) + 27 1 | (19 + 12) × 5 = 95 + __ 60 |
| 82 + 54 = 54 + __ 82 | 69 × 2 = 2 × __ 69 |
| (12 + 9) × 2 = 24 + __ 18 | 92 + 57 = 57 + __ 92 |
| 62 + 55 = 55 + __ 62 | 38 + 40 = 40 + __ 38 |
| 97 × 7 = 100 × 7 - __ × 7 3 | 92 × 5 = 5 × __ 92 |
| 21 × 8 = 8 × __ 21 | 95 + 74 = 74 + __ 95 |