四年级下册 运算律（笔算）
姓名：_______________
学号：_______________
用时：_______________
| 28 + 78 = 78 + __ | (10 + 18) × 6 = 60 + __ |
| 95 × 3 = (100 - __) × 3 | 30 + 62 = 62 + __ |
| 99 + 29 = 29 + __ | 34 + 43 + 19 = (34 + __) + 19 |
| 18 + 33 + 13 = (18 + __) + 13 | 3 + 24 + 37 = (3 + __) + 37 |
| 13 × 8 = 8 × __ | 99 × 2 = (100 - __) × 2 |
| 31 × 4 = 4 × __ | 12 × 7 = 7 × __ |
| 96 × 7 = 100 × 7 - __ × 7 | (20 + 20) × 9 = 180 + __ |
| (3 + 12) × 2 = 6 + __ | 33 + 10 = 10 + __ |
| 33 + 15 + 28 = (33 + __) + 28 | 54 × 9 = 9 × __ |
| 23 + 8 + 22 = (23 + __) + 22 | (7 + 9) × 8 = 56 + __ |
| 41 + 10 + 32 = (41 + __) + 32 | 39 × 5 = 5 × __ |
| 95 × 4 = (100 - __) × 4 | (10 + 13) × 2 = 20 + __ |
| 98 × 3 = 100 × 3 - __ × 3 | 42 + 47 + 43 = (42 + __) + 43 |
| (15 + 3) × 4 = 60 + __ | 98 × 7 = (100 - __) × 7 |
| 36 + 90 = 90 + __ | 96 × 9 = 100 × 9 - __ × 9 |
| 34 + 77 = 77 + __ | 16 + 50 = 50 + __ |
| 97 × 7 = 100 × 7 - __ × 7 | 34 × 7 = 7 × __ |
| 9 + 8 + 46 = (9 + __) + 46 | 97 × 6 = 100 × 6 - __ × 6 |
四年级下册 运算律（笔算）（答案）
姓名：_______________
学号：_______________
用时：_______________
| 28 + 78 = 78 + __ 28 | (10 + 18) × 6 = 60 + __ 108 |
| 95 × 3 = (100 - __) × 3 5 | 30 + 62 = 62 + __ 30 |
| 99 + 29 = 29 + __ 99 | 34 + 43 + 19 = (34 + __) + 19 43 |
| 18 + 33 + 13 = (18 + __) + 13 33 | 3 + 24 + 37 = (3 + __) + 37 24 |
| 13 × 8 = 8 × __ 13 | 99 × 2 = (100 - __) × 2 1 |
| 31 × 4 = 4 × __ 31 | 12 × 7 = 7 × __ 12 |
| 96 × 7 = 100 × 7 - __ × 7 4 | (20 + 20) × 9 = 180 + __ 180 |
| (3 + 12) × 2 = 6 + __ 24 | 33 + 10 = 10 + __ 33 |
| 33 + 15 + 28 = (33 + __) + 28 15 | 54 × 9 = 9 × __ 54 |
| 23 + 8 + 22 = (23 + __) + 22 8 | (7 + 9) × 8 = 56 + __ 72 |
| 41 + 10 + 32 = (41 + __) + 32 10 | 39 × 5 = 5 × __ 39 |
| 95 × 4 = (100 - __) × 4 5 | (10 + 13) × 2 = 20 + __ 26 |
| 98 × 3 = 100 × 3 - __ × 3 2 | 42 + 47 + 43 = (42 + __) + 43 47 |
| (15 + 3) × 4 = 60 + __ 12 | 98 × 7 = (100 - __) × 7 2 |
| 36 + 90 = 90 + __ 36 | 96 × 9 = 100 × 9 - __ × 9 4 |
| 34 + 77 = 77 + __ 34 | 16 + 50 = 50 + __ 16 |
| 97 × 7 = 100 × 7 - __ × 7 3 | 34 × 7 = 7 × __ 34 |
| 9 + 8 + 46 = (9 + __) + 46 8 | 97 × 6 = 100 × 6 - __ × 6 3 |