四年级下册 运算律（笔算）
姓名：_______________
学号：_______________
用时：_______________
| (5 + 11) × 9 = 45 + __ | 37 × 2 = 2 × __ |
| 17 + 25 + 21 = (17 + __) + 21 | 59 + 51 = 51 + __ |
| 23 + 43 + 23 = (23 + __) + 23 | 78 + 69 = 69 + __ |
| 96 × 4 = 100 × 4 - __ × 4 | 56 + 63 = 63 + __ |
| 97 × 6 = (100 - __) × 6 | 18 + 90 = 90 + __ |
| 53 × 9 = 9 × __ | 51 + 30 = 30 + __ |
| 95 × 2 = (100 - __) × 2 | (16 + 11) × 9 = 144 + __ |
| (15 + 17) × 4 = 60 + __ | 78 × 4 = 4 × __ |
| 48 + 2 + 17 = (48 + __) + 17 | 98 × 3 = (100 - __) × 3 |
| (15 + 7) × 3 = 45 + __ | 95 × 8 = 100 × 8 - __ × 8 |
| 95 × 8 = 100 × 8 - __ × 8 | 23 + 6 + 7 = (23 + __) + 7 |
| 65 × 8 = 8 × __ | (11 + 3) × 8 = 88 + __ |
| 34 + 49 + 23 = (34 + __) + 23 | (5 + 17) × 4 = 20 + __ |
| 28 × 5 = 5 × __ | 2 + 21 + 16 = (2 + __) + 16 |
| 96 × 6 = 100 × 6 - __ × 6 | 99 × 7 = (100 - __) × 7 |
| (10 + 20) × 9 = 90 + __ | 16 + 47 + 34 = (16 + __) + 34 |
| 54 × 7 = 7 × __ | 40 + 61 = 61 + __ |
| (5 + 9) × 7 = 35 + __ | 2 + 8 + 49 = (2 + __) + 49 |
四年级下册 运算律（笔算）（答案）
姓名：_______________
学号：_______________
用时：_______________
| (5 + 11) × 9 = 45 + __ 99 | 37 × 2 = 2 × __ 37 |
| 17 + 25 + 21 = (17 + __) + 21 25 | 59 + 51 = 51 + __ 59 |
| 23 + 43 + 23 = (23 + __) + 23 43 | 78 + 69 = 69 + __ 78 |
| 96 × 4 = 100 × 4 - __ × 4 4 | 56 + 63 = 63 + __ 56 |
| 97 × 6 = (100 - __) × 6 3 | 18 + 90 = 90 + __ 18 |
| 53 × 9 = 9 × __ 53 | 51 + 30 = 30 + __ 51 |
| 95 × 2 = (100 - __) × 2 5 | (16 + 11) × 9 = 144 + __ 99 |
| (15 + 17) × 4 = 60 + __ 68 | 78 × 4 = 4 × __ 78 |
| 48 + 2 + 17 = (48 + __) + 17 2 | 98 × 3 = (100 - __) × 3 2 |
| (15 + 7) × 3 = 45 + __ 21 | 95 × 8 = 100 × 8 - __ × 8 5 |
| 95 × 8 = 100 × 8 - __ × 8 5 | 23 + 6 + 7 = (23 + __) + 7 6 |
| 65 × 8 = 8 × __ 65 | (11 + 3) × 8 = 88 + __ 24 |
| 34 + 49 + 23 = (34 + __) + 23 49 | (5 + 17) × 4 = 20 + __ 68 |
| 28 × 5 = 5 × __ 28 | 2 + 21 + 16 = (2 + __) + 16 21 |
| 96 × 6 = 100 × 6 - __ × 6 4 | 99 × 7 = (100 - __) × 7 1 |
| (10 + 20) × 9 = 90 + __ 180 | 16 + 47 + 34 = (16 + __) + 34 47 |
| 54 × 7 = 7 × __ 54 | 40 + 61 = 61 + __ 40 |
| (5 + 9) × 7 = 35 + __ 63 | 2 + 8 + 49 = (2 + __) + 49 8 |