四年级下册 运算律（笔算）
姓名：_______________
学号：_______________
用时：_______________
| 97 × 8 = 100 × 8 - __ × 8 | 99 × 9 = (100 - __) × 9 |
| (19 + 16) × 6 = 114 + __ | 99 × 9 = 100 × 9 - __ × 9 |
| (12 + 4) × 2 = 24 + __ | 98 × 6 = (100 - __) × 6 |
| 46 × 5 = 5 × __ | 79 + 68 = 68 + __ |
| 16 + 50 + 23 = (16 + __) + 23 | 46 × 5 = 5 × __ |
| (2 + 20) × 5 = 10 + __ | 95 × 4 = (100 - __) × 4 |
| 69 + 82 = 82 + __ | 80 × 8 = 8 × __ |
| (8 + 13) × 4 = 32 + __ | 53 × 4 = 4 × __ |
| 81 × 7 = 7 × __ | (3 + 12) × 5 = 15 + __ |
| 13 + 17 = 17 + __ | (8 + 18) × 2 = 16 + __ |
| (12 + 12) × 6 = 72 + __ | 96 × 6 = 6 × __ |
| 4 + 23 + 32 = (4 + __) + 32 | 35 + 16 = 16 + __ |
| 98 × 8 = (100 - __) × 8 | 63 + 28 = 28 + __ |
| 98 × 7 = (100 - __) × 7 | 13 × 2 = 2 × __ |
| (11 + 7) × 9 = 99 + __ | 66 + 17 = 17 + __ |
| 95 × 5 = 100 × 5 - __ × 5 | 20 + 2 + 41 = (20 + __) + 41 |
| 16 + 91 = 91 + __ | 8 + 6 + 41 = (8 + __) + 41 |
| (5 + 11) × 6 = 30 + __ | 39 + 18 + 24 = (39 + __) + 24 |
四年级下册 运算律（笔算）（答案）
姓名：_______________
学号：_______________
用时：_______________
| 97 × 8 = 100 × 8 - __ × 8 3 | 99 × 9 = (100 - __) × 9 1 |
| (19 + 16) × 6 = 114 + __ 96 | 99 × 9 = 100 × 9 - __ × 9 1 |
| (12 + 4) × 2 = 24 + __ 8 | 98 × 6 = (100 - __) × 6 2 |
| 46 × 5 = 5 × __ 46 | 79 + 68 = 68 + __ 79 |
| 16 + 50 + 23 = (16 + __) + 23 50 | 46 × 5 = 5 × __ 46 |
| (2 + 20) × 5 = 10 + __ 100 | 95 × 4 = (100 - __) × 4 5 |
| 69 + 82 = 82 + __ 69 | 80 × 8 = 8 × __ 80 |
| (8 + 13) × 4 = 32 + __ 52 | 53 × 4 = 4 × __ 53 |
| 81 × 7 = 7 × __ 81 | (3 + 12) × 5 = 15 + __ 60 |
| 13 + 17 = 17 + __ 13 | (8 + 18) × 2 = 16 + __ 36 |
| (12 + 12) × 6 = 72 + __ 72 | 96 × 6 = 6 × __ 96 |
| 4 + 23 + 32 = (4 + __) + 32 23 | 35 + 16 = 16 + __ 35 |
| 98 × 8 = (100 - __) × 8 2 | 63 + 28 = 28 + __ 63 |
| 98 × 7 = (100 - __) × 7 2 | 13 × 2 = 2 × __ 13 |
| (11 + 7) × 9 = 99 + __ 63 | 66 + 17 = 17 + __ 66 |
| 95 × 5 = 100 × 5 - __ × 5 5 | 20 + 2 + 41 = (20 + __) + 41 2 |
| 16 + 91 = 91 + __ 16 | 8 + 6 + 41 = (8 + __) + 41 6 |
| (5 + 11) × 6 = 30 + __ 66 | 39 + 18 + 24 = (39 + __) + 24 18 |