四年级下册 运算律（笔算）
姓名：_______________
学号：_______________
用时：_______________
| 97 × 9 = (100 - __) × 9 | 56 + 77 = 77 + __ |
| (5 + 9) × 8 = 40 + __ | 19 + 99 = 99 + __ |
| (14 + 14) × 5 = 70 + __ | 86 × 5 = 5 × __ |
| 95 × 7 = 7 × __ | 66 × 5 = 5 × __ |
| 41 × 4 = 4 × __ | (1 + 14) × 2 = 2 + __ |
| (1 + 11) × 5 = 5 + __ | 5 + 31 + 36 = (5 + __) + 36 |
| 99 × 3 = 100 × 3 - __ × 3 | (3 + 7) × 4 = 12 + __ |
| 98 × 4 = 100 × 4 - __ × 4 | 98 × 8 = 100 × 8 - __ × 8 |
| (17 + 2) × 2 = 34 + __ | 50 × 8 = 8 × __ |
| 16 + 30 + 45 = (16 + __) + 45 | 98 × 5 = 100 × 5 - __ × 5 |
| 91 + 68 = 68 + __ | 5 + 22 + 1 = (5 + __) + 1 |
| 55 + 14 = 14 + __ | 6 + 36 + 1 = (6 + __) + 1 |
| 97 × 7 = 100 × 7 - __ × 7 | 95 × 5 = 100 × 5 - __ × 5 |
| 99 × 2 = 100 × 2 - __ × 2 | 81 + 17 = 17 + __ |
| 50 + 4 + 41 = (50 + __) + 41 | 39 + 4 + 47 = (39 + __) + 47 |
| 98 × 3 = (100 - __) × 3 | 42 + 34 + 32 = (42 + __) + 32 |
| 6 × 7 = 7 × __ | 90 + 25 = 25 + __ |
| 20 + 39 + 24 = (20 + __) + 24 | 4 + 15 + 4 = (4 + __) + 4 |
四年级下册 运算律（笔算）（答案）
姓名：_______________
学号：_______________
用时：_______________
| 97 × 9 = (100 - __) × 9 3 | 56 + 77 = 77 + __ 56 |
| (5 + 9) × 8 = 40 + __ 72 | 19 + 99 = 99 + __ 19 |
| (14 + 14) × 5 = 70 + __ 70 | 86 × 5 = 5 × __ 86 |
| 95 × 7 = 7 × __ 95 | 66 × 5 = 5 × __ 66 |
| 41 × 4 = 4 × __ 41 | (1 + 14) × 2 = 2 + __ 28 |
| (1 + 11) × 5 = 5 + __ 55 | 5 + 31 + 36 = (5 + __) + 36 31 |
| 99 × 3 = 100 × 3 - __ × 3 1 | (3 + 7) × 4 = 12 + __ 28 |
| 98 × 4 = 100 × 4 - __ × 4 2 | 98 × 8 = 100 × 8 - __ × 8 2 |
| (17 + 2) × 2 = 34 + __ 4 | 50 × 8 = 8 × __ 50 |
| 16 + 30 + 45 = (16 + __) + 45 30 | 98 × 5 = 100 × 5 - __ × 5 2 |
| 91 + 68 = 68 + __ 91 | 5 + 22 + 1 = (5 + __) + 1 22 |
| 55 + 14 = 14 + __ 55 | 6 + 36 + 1 = (6 + __) + 1 36 |
| 97 × 7 = 100 × 7 - __ × 7 3 | 95 × 5 = 100 × 5 - __ × 5 5 |
| 99 × 2 = 100 × 2 - __ × 2 1 | 81 + 17 = 17 + __ 81 |
| 50 + 4 + 41 = (50 + __) + 41 4 | 39 + 4 + 47 = (39 + __) + 47 4 |
| 98 × 3 = (100 - __) × 3 2 | 42 + 34 + 32 = (42 + __) + 32 34 |
| 6 × 7 = 7 × __ 6 | 90 + 25 = 25 + __ 90 |
| 20 + 39 + 24 = (20 + __) + 24 39 | 4 + 15 + 4 = (4 + __) + 4 15 |