四年级下册 运算律（笔算）
姓名：_______________
学号：_______________
用时：_______________
| 98 × 5 = (100 - __) × 5 | (12 + 1) × 2 = 24 + __ |
| 50 + 4 + 47 = (50 + __) + 47 | 96 × 2 = (100 - __) × 2 |
| (14 + 4) × 5 = 70 + __ | (19 + 8) × 8 = 152 + __ |
| 97 × 7 = (100 - __) × 7 | 23 + 32 = 32 + __ |
| 99 × 7 = (100 - __) × 7 | 11 × 7 = 7 × __ |
| 68 × 4 = 4 × __ | 40 + 30 + 16 = (40 + __) + 16 |
| 96 × 4 = 100 × 4 - __ × 4 | 96 × 9 = 9 × __ |
| 18 + 25 + 10 = (18 + __) + 10 | 3 × 5 = 5 × __ |
| 44 + 2 + 43 = (44 + __) + 43 | 55 × 7 = 7 × __ |
| (7 + 12) × 7 = 49 + __ | 96 × 8 = 100 × 8 - __ × 8 |
| 96 × 6 = 100 × 6 - __ × 6 | (3 + 17) × 2 = 6 + __ |
| (8 + 9) × 5 = 40 + __ | 47 × 3 = 3 × __ |
| 95 × 6 = 100 × 6 - __ × 6 | 56 + 52 = 52 + __ |
| (16 + 6) × 3 = 48 + __ | 17 + 85 = 85 + __ |
| 99 × 2 = (100 - __) × 2 | 7 + 48 + 42 = (7 + __) + 42 |
| (19 + 5) × 5 = 95 + __ | 75 + 92 = 92 + __ |
| 50 + 20 + 34 = (50 + __) + 34 | 51 + 31 = 31 + __ |
| 34 + 49 = 49 + __ | 62 × 5 = 5 × __ |
四年级下册 运算律（笔算）（答案）
姓名：_______________
学号：_______________
用时：_______________
| 98 × 5 = (100 - __) × 5 2 | (12 + 1) × 2 = 24 + __ 2 |
| 50 + 4 + 47 = (50 + __) + 47 4 | 96 × 2 = (100 - __) × 2 4 |
| (14 + 4) × 5 = 70 + __ 20 | (19 + 8) × 8 = 152 + __ 64 |
| 97 × 7 = (100 - __) × 7 3 | 23 + 32 = 32 + __ 23 |
| 99 × 7 = (100 - __) × 7 1 | 11 × 7 = 7 × __ 11 |
| 68 × 4 = 4 × __ 68 | 40 + 30 + 16 = (40 + __) + 16 30 |
| 96 × 4 = 100 × 4 - __ × 4 4 | 96 × 9 = 9 × __ 96 |
| 18 + 25 + 10 = (18 + __) + 10 25 | 3 × 5 = 5 × __ 3 |
| 44 + 2 + 43 = (44 + __) + 43 2 | 55 × 7 = 7 × __ 55 |
| (7 + 12) × 7 = 49 + __ 84 | 96 × 8 = 100 × 8 - __ × 8 4 |
| 96 × 6 = 100 × 6 - __ × 6 4 | (3 + 17) × 2 = 6 + __ 34 |
| (8 + 9) × 5 = 40 + __ 45 | 47 × 3 = 3 × __ 47 |
| 95 × 6 = 100 × 6 - __ × 6 5 | 56 + 52 = 52 + __ 56 |
| (16 + 6) × 3 = 48 + __ 18 | 17 + 85 = 85 + __ 17 |
| 99 × 2 = (100 - __) × 2 1 | 7 + 48 + 42 = (7 + __) + 42 48 |
| (19 + 5) × 5 = 95 + __ 25 | 75 + 92 = 92 + __ 75 |
| 50 + 20 + 34 = (50 + __) + 34 20 | 51 + 31 = 31 + __ 51 |
| 34 + 49 = 49 + __ 34 | 62 × 5 = 5 × __ 62 |