四年级下册 运算律（笔算）
姓名：_______________
学号：_______________
用时：_______________
| (8 + 9) × 9 = 72 + __ | 28 × 9 = 9 × __ |
| 91 + 56 = 56 + __ | 99 + 22 = 22 + __ |
| 3 × 9 = 9 × __ | (11 + 12) × 3 = 33 + __ |
| 27 + 24 + 42 = (27 + __) + 42 | 97 × 9 = (100 - __) × 9 |
| 13 + 41 + 4 = (13 + __) + 4 | (18 + 13) × 5 = 90 + __ |
| 14 × 7 = 7 × __ | (5 + 3) × 7 = 35 + __ |
| 96 × 6 = 100 × 6 - __ × 6 | 99 × 7 = 100 × 7 - __ × 7 |
| (8 + 17) × 9 = 72 + __ | 98 × 9 = (100 - __) × 9 |
| 8 × 8 = 8 × __ | 13 + 6 + 6 = (13 + __) + 6 |
| 49 × 8 = 8 × __ | 26 + 43 + 41 = (26 + __) + 41 |
| 32 × 4 = 4 × __ | 77 + 18 = 18 + __ |
| 20 + 26 + 20 = (20 + __) + 20 | (3 + 5) × 7 = 21 + __ |
| 94 + 56 = 56 + __ | 96 × 7 = 100 × 7 - __ × 7 |
| 97 × 4 = (100 - __) × 4 | 14 × 8 = 8 × __ |
| 57 + 66 = 66 + __ | (15 + 17) × 4 = 60 + __ |
| 98 × 5 = (100 - __) × 5 | 98 × 7 = (100 - __) × 7 |
| 14 + 22 + 23 = (14 + __) + 23 | 66 + 70 = 70 + __ |
| 95 × 5 = (100 - __) × 5 | 95 × 3 = (100 - __) × 3 |
四年级下册 运算律（笔算）（答案）
姓名：_______________
学号：_______________
用时：_______________
| (8 + 9) × 9 = 72 + __ 81 | 28 × 9 = 9 × __ 28 |
| 91 + 56 = 56 + __ 91 | 99 + 22 = 22 + __ 99 |
| 3 × 9 = 9 × __ 3 | (11 + 12) × 3 = 33 + __ 36 |
| 27 + 24 + 42 = (27 + __) + 42 24 | 97 × 9 = (100 - __) × 9 3 |
| 13 + 41 + 4 = (13 + __) + 4 41 | (18 + 13) × 5 = 90 + __ 65 |
| 14 × 7 = 7 × __ 14 | (5 + 3) × 7 = 35 + __ 21 |
| 96 × 6 = 100 × 6 - __ × 6 4 | 99 × 7 = 100 × 7 - __ × 7 1 |
| (8 + 17) × 9 = 72 + __ 153 | 98 × 9 = (100 - __) × 9 2 |
| 8 × 8 = 8 × __ 8 | 13 + 6 + 6 = (13 + __) + 6 6 |
| 49 × 8 = 8 × __ 49 | 26 + 43 + 41 = (26 + __) + 41 43 |
| 32 × 4 = 4 × __ 32 | 77 + 18 = 18 + __ 77 |
| 20 + 26 + 20 = (20 + __) + 20 26 | (3 + 5) × 7 = 21 + __ 35 |
| 94 + 56 = 56 + __ 94 | 96 × 7 = 100 × 7 - __ × 7 4 |
| 97 × 4 = (100 - __) × 4 3 | 14 × 8 = 8 × __ 14 |
| 57 + 66 = 66 + __ 57 | (15 + 17) × 4 = 60 + __ 68 |
| 98 × 5 = (100 - __) × 5 2 | 98 × 7 = (100 - __) × 7 2 |
| 14 + 22 + 23 = (14 + __) + 23 22 | 66 + 70 = 70 + __ 66 |
| 95 × 5 = (100 - __) × 5 5 | 95 × 3 = (100 - __) × 3 5 |