四年级下册 运算律（笔算）
姓名：_______________
学号：_______________
用时：_______________
| (10 + 6) × 7 = 70 + __ | 72 × 3 = 3 × __ |
| (9 + 2) × 3 = 27 + __ | 44 + 4 + 11 = (44 + __) + 11 |
| (13 + 9) × 6 = 78 + __ | 99 × 5 = 100 × 5 - __ × 5 |
| 50 + 38 = 38 + __ | 35 + 48 = 48 + __ |
| 99 × 6 = 100 × 6 - __ × 6 | 87 × 6 = 6 × __ |
| 86 + 71 = 71 + __ | 71 + 83 = 83 + __ |
| 97 + 59 = 59 + __ | 99 × 7 = 100 × 7 - __ × 7 |
| 8 × 4 = 4 × __ | 40 + 17 + 9 = (40 + __) + 9 |
| (6 + 13) × 5 = 30 + __ | 99 × 3 = 100 × 3 - __ × 3 |
| 90 + 87 = 87 + __ | 25 + 79 = 79 + __ |
| 2 + 47 + 20 = (2 + __) + 20 | 81 × 4 = 4 × __ |
| (16 + 5) × 6 = 96 + __ | 50 + 6 + 33 = (50 + __) + 33 |
| 11 + 31 + 28 = (11 + __) + 28 | 99 × 5 = 100 × 5 - __ × 5 |
| 99 × 4 = 100 × 4 - __ × 4 | (5 + 15) × 3 = 15 + __ |
| 49 × 5 = 5 × __ | 34 × 7 = 7 × __ |
| 43 + 37 + 25 = (43 + __) + 25 | 10 × 6 = 6 × __ |
| 57 + 87 = 87 + __ | (11 + 16) × 5 = 55 + __ |
| 96 × 6 = (100 - __) × 6 | 35 + 16 + 42 = (35 + __) + 42 |
四年级下册 运算律（笔算）（答案）
姓名：_______________
学号：_______________
用时：_______________
| (10 + 6) × 7 = 70 + __ 42 | 72 × 3 = 3 × __ 72 |
| (9 + 2) × 3 = 27 + __ 6 | 44 + 4 + 11 = (44 + __) + 11 4 |
| (13 + 9) × 6 = 78 + __ 54 | 99 × 5 = 100 × 5 - __ × 5 1 |
| 50 + 38 = 38 + __ 50 | 35 + 48 = 48 + __ 35 |
| 99 × 6 = 100 × 6 - __ × 6 1 | 87 × 6 = 6 × __ 87 |
| 86 + 71 = 71 + __ 86 | 71 + 83 = 83 + __ 71 |
| 97 + 59 = 59 + __ 97 | 99 × 7 = 100 × 7 - __ × 7 1 |
| 8 × 4 = 4 × __ 8 | 40 + 17 + 9 = (40 + __) + 9 17 |
| (6 + 13) × 5 = 30 + __ 65 | 99 × 3 = 100 × 3 - __ × 3 1 |
| 90 + 87 = 87 + __ 90 | 25 + 79 = 79 + __ 25 |
| 2 + 47 + 20 = (2 + __) + 20 47 | 81 × 4 = 4 × __ 81 |
| (16 + 5) × 6 = 96 + __ 30 | 50 + 6 + 33 = (50 + __) + 33 6 |
| 11 + 31 + 28 = (11 + __) + 28 31 | 99 × 5 = 100 × 5 - __ × 5 1 |
| 99 × 4 = 100 × 4 - __ × 4 1 | (5 + 15) × 3 = 15 + __ 45 |
| 49 × 5 = 5 × __ 49 | 34 × 7 = 7 × __ 34 |
| 43 + 37 + 25 = (43 + __) + 25 37 | 10 × 6 = 6 × __ 10 |
| 57 + 87 = 87 + __ 57 | (11 + 16) × 5 = 55 + __ 80 |
| 96 × 6 = (100 - __) × 6 4 | 35 + 16 + 42 = (35 + __) + 42 16 |