四年级下册 运算律（笔算）
姓名：_______________
学号：_______________
用时：_______________
| 85 × 7 = 7 × __ | 25 × 9 = 9 × __ |
| 61 × 9 = 9 × __ | 99 × 2 = 100 × 2 - __ × 2 |
| (11 + 1) × 2 = 22 + __ | 52 + 72 = 72 + __ |
| 20 + 8 + 43 = (20 + __) + 43 | (12 + 4) × 3 = 36 + __ |
| 11 + 89 = 89 + __ | 46 + 75 = 75 + __ |
| 22 + 15 + 18 = (22 + __) + 18 | 14 + 54 = 54 + __ |
| (18 + 5) × 7 = 126 + __ | 44 + 7 + 37 = (44 + __) + 37 |
| 86 × 5 = 5 × __ | 49 + 40 = 40 + __ |
| 95 × 5 = (100 - __) × 5 | 45 + 78 = 78 + __ |
| (7 + 14) × 6 = 42 + __ | 33 + 31 + 38 = (33 + __) + 38 |
| 74 × 9 = 9 × __ | (2 + 1) × 3 = 6 + __ |
| 13 + 13 = 13 + __ | 32 + 18 + 9 = (32 + __) + 9 |
| 25 × 9 = 9 × __ | 97 × 4 = (100 - __) × 4 |
| (20 + 8) × 4 = 80 + __ | (6 + 19) × 4 = 24 + __ |
| 96 × 5 = 100 × 5 - __ × 5 | (11 + 1) × 7 = 77 + __ |
| 67 × 5 = 5 × __ | 10 + 26 = 26 + __ |
| 99 × 6 = 100 × 6 - __ × 6 | 54 × 9 = 9 × __ |
| 71 × 6 = 6 × __ | 97 × 8 = 100 × 8 - __ × 8 |
四年级下册 运算律（笔算）（答案）
姓名：_______________
学号：_______________
用时：_______________
| 85 × 7 = 7 × __ 85 | 25 × 9 = 9 × __ 25 |
| 61 × 9 = 9 × __ 61 | 99 × 2 = 100 × 2 - __ × 2 1 |
| (11 + 1) × 2 = 22 + __ 2 | 52 + 72 = 72 + __ 52 |
| 20 + 8 + 43 = (20 + __) + 43 8 | (12 + 4) × 3 = 36 + __ 12 |
| 11 + 89 = 89 + __ 11 | 46 + 75 = 75 + __ 46 |
| 22 + 15 + 18 = (22 + __) + 18 15 | 14 + 54 = 54 + __ 14 |
| (18 + 5) × 7 = 126 + __ 35 | 44 + 7 + 37 = (44 + __) + 37 7 |
| 86 × 5 = 5 × __ 86 | 49 + 40 = 40 + __ 49 |
| 95 × 5 = (100 - __) × 5 5 | 45 + 78 = 78 + __ 45 |
| (7 + 14) × 6 = 42 + __ 84 | 33 + 31 + 38 = (33 + __) + 38 31 |
| 74 × 9 = 9 × __ 74 | (2 + 1) × 3 = 6 + __ 3 |
| 13 + 13 = 13 + __ 13 | 32 + 18 + 9 = (32 + __) + 9 18 |
| 25 × 9 = 9 × __ 25 | 97 × 4 = (100 - __) × 4 3 |
| (20 + 8) × 4 = 80 + __ 32 | (6 + 19) × 4 = 24 + __ 76 |
| 96 × 5 = 100 × 5 - __ × 5 4 | (11 + 1) × 7 = 77 + __ 7 |
| 67 × 5 = 5 × __ 67 | 10 + 26 = 26 + __ 10 |
| 99 × 6 = 100 × 6 - __ × 6 1 | 54 × 9 = 9 × __ 54 |
| 71 × 6 = 6 × __ 71 | 97 × 8 = 100 × 8 - __ × 8 3 |