四年级下册 运算律（笔算）
姓名：_______________
学号：_______________
用时：_______________
| 26 × 2 = 2 × __ | (11 + 5) × 9 = 99 + __ |
| 77 + 10 = 10 + __ | (15 + 5) × 4 = 60 + __ |
| 16 + 76 = 76 + __ | 45 + 50 + 21 = (45 + __) + 21 |
| 30 + 68 = 68 + __ | 18 + 41 + 29 = (18 + __) + 29 |
| 83 × 2 = 2 × __ | 31 + 95 = 95 + __ |
| 24 + 20 = 20 + __ | 98 × 2 = 2 × __ |
| 96 × 6 = 100 × 6 - __ × 6 | 89 + 32 = 32 + __ |
| (10 + 8) × 8 = 80 + __ | 44 + 61 = 61 + __ |
| 17 + 31 + 43 = (17 + __) + 43 | 76 + 98 = 98 + __ |
| 5 + 12 + 2 = (5 + __) + 2 | 96 × 3 = 100 × 3 - __ × 3 |
| (15 + 14) × 2 = 30 + __ | 99 × 7 = (100 - __) × 7 |
| 4 × 3 = 3 × __ | 3 + 16 + 21 = (3 + __) + 21 |
| (15 + 1) × 3 = 45 + __ | 95 × 7 = (100 - __) × 7 |
| 62 × 7 = 7 × __ | 98 × 2 = 100 × 2 - __ × 2 |
| (15 + 14) × 6 = 90 + __ | 85 × 8 = 8 × __ |
| 95 × 4 = 100 × 4 - __ × 4 | 97 × 7 = 100 × 7 - __ × 7 |
| 45 + 6 + 29 = (45 + __) + 29 | (3 + 5) × 8 = 24 + __ |
| 37 × 2 = 2 × __ | (7 + 16) × 2 = 14 + __ |
四年级下册 运算律（笔算）（答案）
姓名：_______________
学号：_______________
用时：_______________
| 26 × 2 = 2 × __ 26 | (11 + 5) × 9 = 99 + __ 45 |
| 77 + 10 = 10 + __ 77 | (15 + 5) × 4 = 60 + __ 20 |
| 16 + 76 = 76 + __ 16 | 45 + 50 + 21 = (45 + __) + 21 50 |
| 30 + 68 = 68 + __ 30 | 18 + 41 + 29 = (18 + __) + 29 41 |
| 83 × 2 = 2 × __ 83 | 31 + 95 = 95 + __ 31 |
| 24 + 20 = 20 + __ 24 | 98 × 2 = 2 × __ 98 |
| 96 × 6 = 100 × 6 - __ × 6 4 | 89 + 32 = 32 + __ 89 |
| (10 + 8) × 8 = 80 + __ 64 | 44 + 61 = 61 + __ 44 |
| 17 + 31 + 43 = (17 + __) + 43 31 | 76 + 98 = 98 + __ 76 |
| 5 + 12 + 2 = (5 + __) + 2 12 | 96 × 3 = 100 × 3 - __ × 3 4 |
| (15 + 14) × 2 = 30 + __ 28 | 99 × 7 = (100 - __) × 7 1 |
| 4 × 3 = 3 × __ 4 | 3 + 16 + 21 = (3 + __) + 21 16 |
| (15 + 1) × 3 = 45 + __ 3 | 95 × 7 = (100 - __) × 7 5 |
| 62 × 7 = 7 × __ 62 | 98 × 2 = 100 × 2 - __ × 2 2 |
| (15 + 14) × 6 = 90 + __ 84 | 85 × 8 = 8 × __ 85 |
| 95 × 4 = 100 × 4 - __ × 4 5 | 97 × 7 = 100 × 7 - __ × 7 3 |
| 45 + 6 + 29 = (45 + __) + 29 6 | (3 + 5) × 8 = 24 + __ 40 |
| 37 × 2 = 2 × __ 37 | (7 + 16) × 2 = 14 + __ 32 |