四年级下册 运算律（笔算）
姓名：_______________
学号：_______________
用时：_______________
| 31 + 64 = 64 + __ | (15 + 16) × 3 = 45 + __ |
| 67 × 2 = 2 × __ | 73 × 5 = 5 × __ |
| 17 + 23 = 23 + __ | (12 + 11) × 8 = 96 + __ |
| 96 × 5 = (100 - __) × 5 | 98 × 8 = (100 - __) × 8 |
| 39 + 12 + 21 = (39 + __) + 21 | (4 + 20) × 8 = 32 + __ |
| (13 + 15) × 2 = 26 + __ | 48 + 20 + 5 = (48 + __) + 5 |
| 23 + 14 + 32 = (23 + __) + 32 | 36 × 2 = 2 × __ |
| 97 × 3 = 100 × 3 - __ × 3 | 50 + 8 + 6 = (50 + __) + 6 |
| 62 × 3 = 3 × __ | 78 + 24 = 24 + __ |
| (3 + 6) × 6 = 18 + __ | 81 + 67 = 67 + __ |
| 97 × 9 = (100 - __) × 9 | 2 + 10 + 15 = (2 + __) + 15 |
| 50 + 46 = 46 + __ | 20 + 35 = 35 + __ |
| 95 × 9 = (100 - __) × 9 | (7 + 14) × 9 = 63 + __ |
| (6 + 17) × 8 = 48 + __ | 39 + 45 + 18 = (39 + __) + 18 |
| 96 × 2 = 100 × 2 - __ × 2 | (5 + 17) × 4 = 20 + __ |
| 51 + 52 = 52 + __ | 51 × 3 = 3 × __ |
| 15 + 43 + 3 = (15 + __) + 3 | (7 + 17) × 5 = 35 + __ |
| 36 + 13 + 50 = (36 + __) + 50 | 95 × 6 = 100 × 6 - __ × 6 |
四年级下册 运算律（笔算）（答案）
姓名：_______________
学号：_______________
用时：_______________
| 31 + 64 = 64 + __ 31 | (15 + 16) × 3 = 45 + __ 48 |
| 67 × 2 = 2 × __ 67 | 73 × 5 = 5 × __ 73 |
| 17 + 23 = 23 + __ 17 | (12 + 11) × 8 = 96 + __ 88 |
| 96 × 5 = (100 - __) × 5 4 | 98 × 8 = (100 - __) × 8 2 |
| 39 + 12 + 21 = (39 + __) + 21 12 | (4 + 20) × 8 = 32 + __ 160 |
| (13 + 15) × 2 = 26 + __ 30 | 48 + 20 + 5 = (48 + __) + 5 20 |
| 23 + 14 + 32 = (23 + __) + 32 14 | 36 × 2 = 2 × __ 36 |
| 97 × 3 = 100 × 3 - __ × 3 3 | 50 + 8 + 6 = (50 + __) + 6 8 |
| 62 × 3 = 3 × __ 62 | 78 + 24 = 24 + __ 78 |
| (3 + 6) × 6 = 18 + __ 36 | 81 + 67 = 67 + __ 81 |
| 97 × 9 = (100 - __) × 9 3 | 2 + 10 + 15 = (2 + __) + 15 10 |
| 50 + 46 = 46 + __ 50 | 20 + 35 = 35 + __ 20 |
| 95 × 9 = (100 - __) × 9 5 | (7 + 14) × 9 = 63 + __ 126 |
| (6 + 17) × 8 = 48 + __ 136 | 39 + 45 + 18 = (39 + __) + 18 45 |
| 96 × 2 = 100 × 2 - __ × 2 4 | (5 + 17) × 4 = 20 + __ 68 |
| 51 + 52 = 52 + __ 51 | 51 × 3 = 3 × __ 51 |
| 15 + 43 + 3 = (15 + __) + 3 43 | (7 + 17) × 5 = 35 + __ 85 |
| 36 + 13 + 50 = (36 + __) + 50 13 | 95 × 6 = 100 × 6 - __ × 6 5 |