四年级下册 运算律（笔算）
姓名：_______________
学号：_______________
用时：_______________
| 90 × 5 = 5 × __ | 38 × 9 = 9 × __ |
| (16 + 19) × 9 = 144 + __ | 40 × 4 = 4 × __ |
| 16 + 36 + 37 = (16 + __) + 37 | 75 + 29 = 29 + __ |
| 88 + 58 = 58 + __ | 87 + 83 = 83 + __ |
| 44 + 37 + 12 = (44 + __) + 12 | 84 × 3 = 3 × __ |
| 2 + 30 + 44 = (2 + __) + 44 | 39 × 3 = 3 × __ |
| 95 × 8 = 100 × 8 - __ × 8 | (2 + 5) × 7 = 14 + __ |
| 93 + 92 = 92 + __ | 20 × 2 = 2 × __ |
| 98 × 5 = 100 × 5 - __ × 5 | 99 × 3 = (100 - __) × 3 |
| 49 + 25 + 1 = (49 + __) + 1 | 96 × 9 = (100 - __) × 9 |
| 18 × 8 = 8 × __ | (13 + 4) × 5 = 65 + __ |
| 97 × 7 = 100 × 7 - __ × 7 | 97 × 7 = 100 × 7 - __ × 7 |
| (1 + 18) × 6 = 6 + __ | 24 + 56 = 56 + __ |
| 99 × 7 = 100 × 7 - __ × 7 | 41 + 97 = 97 + __ |
| 34 + 81 = 81 + __ | 98 × 4 = 100 × 4 - __ × 4 |
| 9 + 12 + 39 = (9 + __) + 39 | 6 + 38 + 40 = (6 + __) + 40 |
| (14 + 18) × 5 = 70 + __ | 36 + 45 + 43 = (36 + __) + 43 |
| 25 + 23 + 30 = (25 + __) + 30 | 96 × 5 = (100 - __) × 5 |
四年级下册 运算律（笔算）（答案）
姓名：_______________
学号：_______________
用时：_______________
| 90 × 5 = 5 × __ 90 | 38 × 9 = 9 × __ 38 |
| (16 + 19) × 9 = 144 + __ 171 | 40 × 4 = 4 × __ 40 |
| 16 + 36 + 37 = (16 + __) + 37 36 | 75 + 29 = 29 + __ 75 |
| 88 + 58 = 58 + __ 88 | 87 + 83 = 83 + __ 87 |
| 44 + 37 + 12 = (44 + __) + 12 37 | 84 × 3 = 3 × __ 84 |
| 2 + 30 + 44 = (2 + __) + 44 30 | 39 × 3 = 3 × __ 39 |
| 95 × 8 = 100 × 8 - __ × 8 5 | (2 + 5) × 7 = 14 + __ 35 |
| 93 + 92 = 92 + __ 93 | 20 × 2 = 2 × __ 20 |
| 98 × 5 = 100 × 5 - __ × 5 2 | 99 × 3 = (100 - __) × 3 1 |
| 49 + 25 + 1 = (49 + __) + 1 25 | 96 × 9 = (100 - __) × 9 4 |
| 18 × 8 = 8 × __ 18 | (13 + 4) × 5 = 65 + __ 20 |
| 97 × 7 = 100 × 7 - __ × 7 3 | 97 × 7 = 100 × 7 - __ × 7 3 |
| (1 + 18) × 6 = 6 + __ 108 | 24 + 56 = 56 + __ 24 |
| 99 × 7 = 100 × 7 - __ × 7 1 | 41 + 97 = 97 + __ 41 |
| 34 + 81 = 81 + __ 34 | 98 × 4 = 100 × 4 - __ × 4 2 |
| 9 + 12 + 39 = (9 + __) + 39 12 | 6 + 38 + 40 = (6 + __) + 40 38 |
| (14 + 18) × 5 = 70 + __ 90 | 36 + 45 + 43 = (36 + __) + 43 45 |
| 25 + 23 + 30 = (25 + __) + 30 23 | 96 × 5 = (100 - __) × 5 4 |