四年级下册 运算律（笔算）
姓名：_______________
学号：_______________
用时：_______________
| (3 + 18) × 2 = 6 + __ | 47 + 47 + 17 = (47 + __) + 17 |
| 30 + 86 = 86 + __ | 13 + 38 + 23 = (13 + __) + 23 |
| 15 × 7 = 7 × __ | (9 + 9) × 6 = 54 + __ |
| 86 + 74 = 74 + __ | 29 + 30 + 11 = (29 + __) + 11 |
| 56 + 80 = 80 + __ | 98 × 5 = (100 - __) × 5 |
| 35 + 28 + 12 = (35 + __) + 12 | (16 + 10) × 6 = 96 + __ |
| 97 × 4 = 100 × 4 - __ × 4 | 97 × 4 = 100 × 4 - __ × 4 |
| 86 × 3 = 3 × __ | (18 + 3) × 4 = 72 + __ |
| 21 + 22 + 8 = (21 + __) + 8 | (14 + 3) × 2 = 28 + __ |
| 35 + 14 = 14 + __ | 96 × 4 = (100 - __) × 4 |
| 99 × 9 = (100 - __) × 9 | 69 + 95 = 95 + __ |
| 22 + 37 + 16 = (22 + __) + 16 | 35 + 62 = 62 + __ |
| 99 + 82 = 82 + __ | 97 × 9 = 100 × 9 - __ × 9 |
| 97 × 4 = (100 - __) × 4 | 10 + 15 + 9 = (10 + __) + 9 |
| 21 + 44 = 44 + __ | (2 + 18) × 3 = 6 + __ |
| 61 × 7 = 7 × __ | 8 + 4 + 36 = (8 + __) + 36 |
| 48 × 5 = 5 × __ | 44 + 36 + 9 = (44 + __) + 9 |
| 98 × 8 = 100 × 8 - __ × 8 | (1 + 9) × 2 = 2 + __ |
四年级下册 运算律（笔算）（答案）
姓名：_______________
学号：_______________
用时：_______________
| (3 + 18) × 2 = 6 + __ 36 | 47 + 47 + 17 = (47 + __) + 17 47 |
| 30 + 86 = 86 + __ 30 | 13 + 38 + 23 = (13 + __) + 23 38 |
| 15 × 7 = 7 × __ 15 | (9 + 9) × 6 = 54 + __ 54 |
| 86 + 74 = 74 + __ 86 | 29 + 30 + 11 = (29 + __) + 11 30 |
| 56 + 80 = 80 + __ 56 | 98 × 5 = (100 - __) × 5 2 |
| 35 + 28 + 12 = (35 + __) + 12 28 | (16 + 10) × 6 = 96 + __ 60 |
| 97 × 4 = 100 × 4 - __ × 4 3 | 97 × 4 = 100 × 4 - __ × 4 3 |
| 86 × 3 = 3 × __ 86 | (18 + 3) × 4 = 72 + __ 12 |
| 21 + 22 + 8 = (21 + __) + 8 22 | (14 + 3) × 2 = 28 + __ 6 |
| 35 + 14 = 14 + __ 35 | 96 × 4 = (100 - __) × 4 4 |
| 99 × 9 = (100 - __) × 9 1 | 69 + 95 = 95 + __ 69 |
| 22 + 37 + 16 = (22 + __) + 16 37 | 35 + 62 = 62 + __ 35 |
| 99 + 82 = 82 + __ 99 | 97 × 9 = 100 × 9 - __ × 9 3 |
| 97 × 4 = (100 - __) × 4 3 | 10 + 15 + 9 = (10 + __) + 9 15 |
| 21 + 44 = 44 + __ 21 | (2 + 18) × 3 = 6 + __ 54 |
| 61 × 7 = 7 × __ 61 | 8 + 4 + 36 = (8 + __) + 36 4 |
| 48 × 5 = 5 × __ 48 | 44 + 36 + 9 = (44 + __) + 9 36 |
| 98 × 8 = 100 × 8 - __ × 8 2 | (1 + 9) × 2 = 2 + __ 18 |