四年级下册 运算律（笔算）
姓名：_______________
学号：_______________
用时：_______________
| 33 + 10 = 10 + __ | 99 × 7 = 100 × 7 - __ × 7 |
| (5 + 9) × 8 = 40 + __ | 97 × 5 = (100 - __) × 5 |
| 99 × 4 = 100 × 4 - __ × 4 | 32 + 24 = 24 + __ |
| 28 + 68 = 68 + __ | (18 + 7) × 9 = 162 + __ |
| 97 × 2 = (100 - __) × 2 | 43 + 31 + 24 = (43 + __) + 24 |
| (8 + 6) × 6 = 48 + __ | 10 + 51 = 51 + __ |
| 98 × 4 = (100 - __) × 4 | 5 + 46 + 34 = (5 + __) + 34 |
| 98 × 9 = (100 - __) × 9 | 54 × 9 = 9 × __ |
| (20 + 12) × 3 = 60 + __ | 24 + 13 = 13 + __ |
| (7 + 11) × 2 = 14 + __ | 20 + 86 = 86 + __ |
| 99 × 2 = (100 - __) × 2 | 22 + 50 + 40 = (22 + __) + 40 |
| 38 + 12 + 9 = (38 + __) + 9 | 28 × 4 = 4 × __ |
| 80 × 9 = 9 × __ | (17 + 5) × 3 = 51 + __ |
| 32 × 4 = 4 × __ | (20 + 10) × 4 = 80 + __ |
| 55 × 4 = 4 × __ | 10 × 7 = 7 × __ |
| 36 + 45 + 18 = (36 + __) + 18 | 98 × 3 = (100 - __) × 3 |
| 16 × 2 = 2 × __ | 22 + 4 + 42 = (22 + __) + 42 |
| 80 + 37 = 37 + __ | 40 + 27 + 48 = (40 + __) + 48 |
四年级下册 运算律（笔算）（答案）
姓名：_______________
学号：_______________
用时：_______________
| 33 + 10 = 10 + __ 33 | 99 × 7 = 100 × 7 - __ × 7 1 |
| (5 + 9) × 8 = 40 + __ 72 | 97 × 5 = (100 - __) × 5 3 |
| 99 × 4 = 100 × 4 - __ × 4 1 | 32 + 24 = 24 + __ 32 |
| 28 + 68 = 68 + __ 28 | (18 + 7) × 9 = 162 + __ 63 |
| 97 × 2 = (100 - __) × 2 3 | 43 + 31 + 24 = (43 + __) + 24 31 |
| (8 + 6) × 6 = 48 + __ 36 | 10 + 51 = 51 + __ 10 |
| 98 × 4 = (100 - __) × 4 2 | 5 + 46 + 34 = (5 + __) + 34 46 |
| 98 × 9 = (100 - __) × 9 2 | 54 × 9 = 9 × __ 54 |
| (20 + 12) × 3 = 60 + __ 36 | 24 + 13 = 13 + __ 24 |
| (7 + 11) × 2 = 14 + __ 22 | 20 + 86 = 86 + __ 20 |
| 99 × 2 = (100 - __) × 2 1 | 22 + 50 + 40 = (22 + __) + 40 50 |
| 38 + 12 + 9 = (38 + __) + 9 12 | 28 × 4 = 4 × __ 28 |
| 80 × 9 = 9 × __ 80 | (17 + 5) × 3 = 51 + __ 15 |
| 32 × 4 = 4 × __ 32 | (20 + 10) × 4 = 80 + __ 40 |
| 55 × 4 = 4 × __ 55 | 10 × 7 = 7 × __ 10 |
| 36 + 45 + 18 = (36 + __) + 18 45 | 98 × 3 = (100 - __) × 3 2 |
| 16 × 2 = 2 × __ 16 | 22 + 4 + 42 = (22 + __) + 42 4 |
| 80 + 37 = 37 + __ 80 | 40 + 27 + 48 = (40 + __) + 48 27 |