四年级下册 运算律（笔算）
姓名：_______________
学号：_______________
用时：_______________
| 81 × 7 = 7 × __ | 12 + 8 + 41 = (12 + __) + 41 |
| (1 + 19) × 8 = 8 + __ | 45 × 4 = 4 × __ |
| 37 × 2 = 2 × __ | 96 × 5 = (100 - __) × 5 |
| 33 + 15 = 15 + __ | 37 + 21 + 25 = (37 + __) + 25 |
| 97 × 6 = 100 × 6 - __ × 6 | 95 × 7 = (100 - __) × 7 |
| (6 + 5) × 7 = 42 + __ | (2 + 2) × 4 = 8 + __ |
| (3 + 12) × 6 = 18 + __ | (10 + 3) × 8 = 80 + __ |
| 20 + 35 + 1 = (20 + __) + 1 | 98 + 76 = 76 + __ |
| 5 + 43 + 6 = (5 + __) + 6 | (7 + 18) × 9 = 63 + __ |
| 83 + 69 = 69 + __ | 8 + 33 + 7 = (8 + __) + 7 |
| 61 × 6 = 6 × __ | (4 + 12) × 5 = 20 + __ |
| 98 × 8 = (100 - __) × 8 | 57 + 75 = 75 + __ |
| 29 + 28 = 28 + __ | 18 + 25 + 10 = (18 + __) + 10 |
| 95 × 7 = (100 - __) × 7 | 23 + 43 + 23 = (23 + __) + 23 |
| (15 + 20) × 8 = 120 + __ | 95 × 9 = 100 × 9 - __ × 9 |
| 47 + 7 + 29 = (47 + __) + 29 | 51 + 11 = 11 + __ |
| 44 + 96 = 96 + __ | 35 × 9 = 9 × __ |
| 39 + 4 + 29 = (39 + __) + 29 | 96 × 2 = 100 × 2 - __ × 2 |
四年级下册 运算律（笔算）（答案）
姓名：_______________
学号：_______________
用时：_______________
| 81 × 7 = 7 × __ 81 | 12 + 8 + 41 = (12 + __) + 41 8 |
| (1 + 19) × 8 = 8 + __ 152 | 45 × 4 = 4 × __ 45 |
| 37 × 2 = 2 × __ 37 | 96 × 5 = (100 - __) × 5 4 |
| 33 + 15 = 15 + __ 33 | 37 + 21 + 25 = (37 + __) + 25 21 |
| 97 × 6 = 100 × 6 - __ × 6 3 | 95 × 7 = (100 - __) × 7 5 |
| (6 + 5) × 7 = 42 + __ 35 | (2 + 2) × 4 = 8 + __ 8 |
| (3 + 12) × 6 = 18 + __ 72 | (10 + 3) × 8 = 80 + __ 24 |
| 20 + 35 + 1 = (20 + __) + 1 35 | 98 + 76 = 76 + __ 98 |
| 5 + 43 + 6 = (5 + __) + 6 43 | (7 + 18) × 9 = 63 + __ 162 |
| 83 + 69 = 69 + __ 83 | 8 + 33 + 7 = (8 + __) + 7 33 |
| 61 × 6 = 6 × __ 61 | (4 + 12) × 5 = 20 + __ 60 |
| 98 × 8 = (100 - __) × 8 2 | 57 + 75 = 75 + __ 57 |
| 29 + 28 = 28 + __ 29 | 18 + 25 + 10 = (18 + __) + 10 25 |
| 95 × 7 = (100 - __) × 7 5 | 23 + 43 + 23 = (23 + __) + 23 43 |
| (15 + 20) × 8 = 120 + __ 160 | 95 × 9 = 100 × 9 - __ × 9 5 |
| 47 + 7 + 29 = (47 + __) + 29 7 | 51 + 11 = 11 + __ 51 |
| 44 + 96 = 96 + __ 44 | 35 × 9 = 9 × __ 35 |
| 39 + 4 + 29 = (39 + __) + 29 4 | 96 × 2 = 100 × 2 - __ × 2 4 |