四年级下册 运算律（笔算）
姓名：_______________
学号：_______________
用时：_______________
| 52 + 24 = 24 + __ | 7 + 39 + 1 = (7 + __) + 1 |
| 15 × 9 = 9 × __ | 42 + 24 = 24 + __ |
| 9 + 33 + 49 = (9 + __) + 49 | 13 + 40 = 40 + __ |
| 95 × 5 = (100 - __) × 5 | 23 × 5 = 5 × __ |
| 72 + 59 = 59 + __ | 96 × 8 = 100 × 8 - __ × 8 |
| 48 × 4 = 4 × __ | 48 + 55 = 55 + __ |
| 8 + 23 + 5 = (8 + __) + 5 | 78 × 6 = 6 × __ |
| 33 + 14 + 19 = (33 + __) + 19 | 50 + 64 = 64 + __ |
| 96 × 3 = 100 × 3 - __ × 3 | (11 + 19) × 7 = 77 + __ |
| 28 × 5 = 5 × __ | 69 × 6 = 6 × __ |
| 50 × 2 = 2 × __ | 43 + 22 + 21 = (43 + __) + 21 |
| 98 × 3 = (100 - __) × 3 | (9 + 15) × 9 = 81 + __ |
| (9 + 19) × 5 = 45 + __ | (7 + 10) × 2 = 14 + __ |
| (4 + 15) × 6 = 24 + __ | (19 + 9) × 6 = 114 + __ |
| 6 × 3 = 3 × __ | 2 + 48 + 5 = (2 + __) + 5 |
| 9 × 6 = 6 × __ | 98 × 5 = (100 - __) × 5 |
| 1 + 32 + 37 = (1 + __) + 37 | 22 + 37 + 28 = (22 + __) + 28 |
| 98 × 5 = (100 - __) × 5 | 1 + 29 + 1 = (1 + __) + 1 |
四年级下册 运算律（笔算）（答案）
姓名：_______________
学号：_______________
用时：_______________
| 52 + 24 = 24 + __ 52 | 7 + 39 + 1 = (7 + __) + 1 39 |
| 15 × 9 = 9 × __ 15 | 42 + 24 = 24 + __ 42 |
| 9 + 33 + 49 = (9 + __) + 49 33 | 13 + 40 = 40 + __ 13 |
| 95 × 5 = (100 - __) × 5 5 | 23 × 5 = 5 × __ 23 |
| 72 + 59 = 59 + __ 72 | 96 × 8 = 100 × 8 - __ × 8 4 |
| 48 × 4 = 4 × __ 48 | 48 + 55 = 55 + __ 48 |
| 8 + 23 + 5 = (8 + __) + 5 23 | 78 × 6 = 6 × __ 78 |
| 33 + 14 + 19 = (33 + __) + 19 14 | 50 + 64 = 64 + __ 50 |
| 96 × 3 = 100 × 3 - __ × 3 4 | (11 + 19) × 7 = 77 + __ 133 |
| 28 × 5 = 5 × __ 28 | 69 × 6 = 6 × __ 69 |
| 50 × 2 = 2 × __ 50 | 43 + 22 + 21 = (43 + __) + 21 22 |
| 98 × 3 = (100 - __) × 3 2 | (9 + 15) × 9 = 81 + __ 135 |
| (9 + 19) × 5 = 45 + __ 95 | (7 + 10) × 2 = 14 + __ 20 |
| (4 + 15) × 6 = 24 + __ 90 | (19 + 9) × 6 = 114 + __ 54 |
| 6 × 3 = 3 × __ 6 | 2 + 48 + 5 = (2 + __) + 5 48 |
| 9 × 6 = 6 × __ 9 | 98 × 5 = (100 - __) × 5 2 |
| 1 + 32 + 37 = (1 + __) + 37 32 | 22 + 37 + 28 = (22 + __) + 28 37 |
| 98 × 5 = (100 - __) × 5 2 | 1 + 29 + 1 = (1 + __) + 1 29 |