四年级下册 运算律（笔算）
姓名：_______________
学号：_______________
用时：_______________
| 95 × 7 = 100 × 7 - __ × 7 | 99 × 5 = (100 - __) × 5 |
| 13 + 47 + 47 = (13 + __) + 47 | 2 + 26 + 47 = (2 + __) + 47 |
| (12 + 19) × 8 = 96 + __ | 5 × 5 = 5 × __ |
| 97 + 44 = 44 + __ | (14 + 14) × 5 = 70 + __ |
| 65 + 87 = 87 + __ | 95 × 6 = 6 × __ |
| (10 + 13) × 4 = 40 + __ | 96 × 8 = (100 - __) × 8 |
| 41 + 7 + 17 = (41 + __) + 17 | 40 + 50 + 19 = (40 + __) + 19 |
| (13 + 14) × 8 = 104 + __ | 99 × 5 = (100 - __) × 5 |
| 57 + 89 = 89 + __ | 27 × 3 = 3 × __ |
| 72 + 29 = 29 + __ | 93 + 66 = 66 + __ |
| 99 × 8 = 100 × 8 - __ × 8 | 96 × 7 = (100 - __) × 7 |
| 57 + 81 = 81 + __ | 83 × 6 = 6 × __ |
| 7 × 3 = 3 × __ | 95 × 9 = 100 × 9 - __ × 9 |
| (10 + 20) × 2 = 20 + __ | 96 × 8 = 100 × 8 - __ × 8 |
| 14 + 7 + 29 = (14 + __) + 29 | 36 + 2 + 48 = (36 + __) + 48 |
| (16 + 16) × 3 = 48 + __ | 95 × 3 = (100 - __) × 3 |
| 78 + 99 = 99 + __ | 63 × 5 = 5 × __ |
| 95 × 8 = 8 × __ | 47 + 76 = 76 + __ |
四年级下册 运算律（笔算）（答案）
姓名：_______________
学号：_______________
用时：_______________
| 95 × 7 = 100 × 7 - __ × 7 5 | 99 × 5 = (100 - __) × 5 1 |
| 13 + 47 + 47 = (13 + __) + 47 47 | 2 + 26 + 47 = (2 + __) + 47 26 |
| (12 + 19) × 8 = 96 + __ 152 | 5 × 5 = 5 × __ 5 |
| 97 + 44 = 44 + __ 97 | (14 + 14) × 5 = 70 + __ 70 |
| 65 + 87 = 87 + __ 65 | 95 × 6 = 6 × __ 95 |
| (10 + 13) × 4 = 40 + __ 52 | 96 × 8 = (100 - __) × 8 4 |
| 41 + 7 + 17 = (41 + __) + 17 7 | 40 + 50 + 19 = (40 + __) + 19 50 |
| (13 + 14) × 8 = 104 + __ 112 | 99 × 5 = (100 - __) × 5 1 |
| 57 + 89 = 89 + __ 57 | 27 × 3 = 3 × __ 27 |
| 72 + 29 = 29 + __ 72 | 93 + 66 = 66 + __ 93 |
| 99 × 8 = 100 × 8 - __ × 8 1 | 96 × 7 = (100 - __) × 7 4 |
| 57 + 81 = 81 + __ 57 | 83 × 6 = 6 × __ 83 |
| 7 × 3 = 3 × __ 7 | 95 × 9 = 100 × 9 - __ × 9 5 |
| (10 + 20) × 2 = 20 + __ 40 | 96 × 8 = 100 × 8 - __ × 8 4 |
| 14 + 7 + 29 = (14 + __) + 29 7 | 36 + 2 + 48 = (36 + __) + 48 2 |
| (16 + 16) × 3 = 48 + __ 48 | 95 × 3 = (100 - __) × 3 5 |
| 78 + 99 = 99 + __ 78 | 63 × 5 = 5 × __ 63 |
| 95 × 8 = 8 × __ 95 | 47 + 76 = 76 + __ 47 |