四年级下册 运算律（笔算）
姓名：_______________
学号：_______________
用时：_______________
| 29 + 3 + 40 = (29 + __) + 40 | (17 + 18) × 5 = 85 + __ |
| (15 + 15) × 9 = 135 + __ | 45 + 9 + 20 = (45 + __) + 20 |
| 29 + 25 = 25 + __ | 89 × 3 = 3 × __ |
| 19 + 2 + 45 = (19 + __) + 45 | 43 + 12 + 19 = (43 + __) + 19 |
| 97 × 7 = 7 × __ | 22 + 50 + 15 = (22 + __) + 15 |
| 13 + 26 = 26 + __ | 64 × 7 = 7 × __ |
| 98 × 4 = 100 × 4 - __ × 4 | 30 + 31 + 2 = (30 + __) + 2 |
| (13 + 18) × 7 = 91 + __ | 84 + 40 = 40 + __ |
| 87 × 9 = 9 × __ | (12 + 20) × 8 = 96 + __ |
| 25 + 89 = 89 + __ | 99 × 6 = (100 - __) × 6 |
| 37 + 11 + 13 = (37 + __) + 13 | 98 × 5 = 5 × __ |
| 37 × 7 = 7 × __ | 95 × 7 = (100 - __) × 7 |
| (2 + 18) × 3 = 6 + __ | 6 × 8 = 8 × __ |
| 53 + 75 = 75 + __ | (19 + 6) × 4 = 76 + __ |
| (2 + 2) × 8 = 16 + __ | 10 × 6 = 6 × __ |
| 54 × 2 = 2 × __ | 42 + 63 = 63 + __ |
| 67 + 53 = 53 + __ | (15 + 1) × 3 = 45 + __ |
| 96 × 9 = 100 × 9 - __ × 9 | 95 × 4 = 100 × 4 - __ × 4 |
四年级下册 运算律（笔算）（答案）
姓名：_______________
学号：_______________
用时：_______________
| 29 + 3 + 40 = (29 + __) + 40 3 | (17 + 18) × 5 = 85 + __ 90 |
| (15 + 15) × 9 = 135 + __ 135 | 45 + 9 + 20 = (45 + __) + 20 9 |
| 29 + 25 = 25 + __ 29 | 89 × 3 = 3 × __ 89 |
| 19 + 2 + 45 = (19 + __) + 45 2 | 43 + 12 + 19 = (43 + __) + 19 12 |
| 97 × 7 = 7 × __ 97 | 22 + 50 + 15 = (22 + __) + 15 50 |
| 13 + 26 = 26 + __ 13 | 64 × 7 = 7 × __ 64 |
| 98 × 4 = 100 × 4 - __ × 4 2 | 30 + 31 + 2 = (30 + __) + 2 31 |
| (13 + 18) × 7 = 91 + __ 126 | 84 + 40 = 40 + __ 84 |
| 87 × 9 = 9 × __ 87 | (12 + 20) × 8 = 96 + __ 160 |
| 25 + 89 = 89 + __ 25 | 99 × 6 = (100 - __) × 6 1 |
| 37 + 11 + 13 = (37 + __) + 13 11 | 98 × 5 = 5 × __ 98 |
| 37 × 7 = 7 × __ 37 | 95 × 7 = (100 - __) × 7 5 |
| (2 + 18) × 3 = 6 + __ 54 | 6 × 8 = 8 × __ 6 |
| 53 + 75 = 75 + __ 53 | (19 + 6) × 4 = 76 + __ 24 |
| (2 + 2) × 8 = 16 + __ 16 | 10 × 6 = 6 × __ 10 |
| 54 × 2 = 2 × __ 54 | 42 + 63 = 63 + __ 42 |
| 67 + 53 = 53 + __ 67 | (15 + 1) × 3 = 45 + __ 3 |
| 96 × 9 = 100 × 9 - __ × 9 4 | 95 × 4 = 100 × 4 - __ × 4 5 |