四年级下册 运算律（笔算）
姓名：_______________
学号：_______________
用时：_______________
| 51 × 3 = 3 × __ | 21 + 41 + 22 = (21 + __) + 22 |
| 31 + 46 + 9 = (31 + __) + 9 | 43 + 42 = 42 + __ |
| (11 + 1) × 6 = 66 + __ | (19 + 14) × 9 = 171 + __ |
| 96 × 7 = (100 - __) × 7 | 8 + 43 + 41 = (8 + __) + 41 |
| 99 × 3 = (100 - __) × 3 | (11 + 18) × 6 = 66 + __ |
| 17 + 19 + 47 = (17 + __) + 47 | 98 × 8 = 100 × 8 - __ × 8 |
| 5 + 27 + 33 = (5 + __) + 33 | 75 + 33 = 33 + __ |
| 96 × 8 = 100 × 8 - __ × 8 | 62 × 5 = 5 × __ |
| 99 × 4 = (100 - __) × 4 | 22 + 7 + 48 = (22 + __) + 48 |
| 27 × 4 = 4 × __ | 11 + 76 = 76 + __ |
| 95 × 3 = 100 × 3 - __ × 3 | (9 + 2) × 7 = 63 + __ |
| 7 + 50 + 32 = (7 + __) + 32 | 29 + 44 + 50 = (29 + __) + 50 |
| 96 + 71 = 71 + __ | 11 × 2 = 2 × __ |
| (7 + 12) × 4 = 28 + __ | 63 + 48 = 48 + __ |
| 45 × 6 = 6 × __ | 56 × 3 = 3 × __ |
| 56 + 89 = 89 + __ | 91 × 5 = 5 × __ |
| 36 + 72 = 72 + __ | 15 + 85 = 85 + __ |
| 22 × 5 = 5 × __ | 49 + 13 = 13 + __ |
四年级下册 运算律（笔算）（答案）
姓名：_______________
学号：_______________
用时：_______________
| 51 × 3 = 3 × __ 51 | 21 + 41 + 22 = (21 + __) + 22 41 |
| 31 + 46 + 9 = (31 + __) + 9 46 | 43 + 42 = 42 + __ 43 |
| (11 + 1) × 6 = 66 + __ 6 | (19 + 14) × 9 = 171 + __ 126 |
| 96 × 7 = (100 - __) × 7 4 | 8 + 43 + 41 = (8 + __) + 41 43 |
| 99 × 3 = (100 - __) × 3 1 | (11 + 18) × 6 = 66 + __ 108 |
| 17 + 19 + 47 = (17 + __) + 47 19 | 98 × 8 = 100 × 8 - __ × 8 2 |
| 5 + 27 + 33 = (5 + __) + 33 27 | 75 + 33 = 33 + __ 75 |
| 96 × 8 = 100 × 8 - __ × 8 4 | 62 × 5 = 5 × __ 62 |
| 99 × 4 = (100 - __) × 4 1 | 22 + 7 + 48 = (22 + __) + 48 7 |
| 27 × 4 = 4 × __ 27 | 11 + 76 = 76 + __ 11 |
| 95 × 3 = 100 × 3 - __ × 3 5 | (9 + 2) × 7 = 63 + __ 14 |
| 7 + 50 + 32 = (7 + __) + 32 50 | 29 + 44 + 50 = (29 + __) + 50 44 |
| 96 + 71 = 71 + __ 96 | 11 × 2 = 2 × __ 11 |
| (7 + 12) × 4 = 28 + __ 48 | 63 + 48 = 48 + __ 63 |
| 45 × 6 = 6 × __ 45 | 56 × 3 = 3 × __ 56 |
| 56 + 89 = 89 + __ 56 | 91 × 5 = 5 × __ 91 |
| 36 + 72 = 72 + __ 36 | 15 + 85 = 85 + __ 15 |
| 22 × 5 = 5 × __ 22 | 49 + 13 = 13 + __ 49 |