四年级下册 运算律（笔算）
姓名：_______________
学号：_______________
用时：_______________
| 45 × 5 = 5 × __ | 70 × 8 = 8 × __ |
| 45 × 8 = 8 × __ | 47 + 71 = 71 + __ |
| 81 + 35 = 35 + __ | 9 × 5 = 5 × __ |
| (13 + 15) × 8 = 104 + __ | 35 + 17 + 39 = (35 + __) + 39 |
| (10 + 20) × 9 = 90 + __ | (9 + 11) × 3 = 27 + __ |
| (5 + 2) × 2 = 10 + __ | 97 × 6 = (100 - __) × 6 |
| 65 × 4 = 4 × __ | 96 × 3 = 100 × 3 - __ × 3 |
| (9 + 15) × 7 = 63 + __ | (16 + 4) × 9 = 144 + __ |
| (20 + 7) × 7 = 140 + __ | 47 + 10 + 48 = (47 + __) + 48 |
| 9 + 32 + 42 = (9 + __) + 42 | 37 + 92 = 92 + __ |
| 41 + 36 + 32 = (41 + __) + 32 | (16 + 3) × 2 = 32 + __ |
| 95 × 4 = 100 × 4 - __ × 4 | 98 × 2 = (100 - __) × 2 |
| 6 × 3 = 3 × __ | 96 × 2 = 100 × 2 - __ × 2 |
| 37 + 89 = 89 + __ | 52 + 22 = 22 + __ |
| 5 + 27 + 38 = (5 + __) + 38 | 20 + 61 = 61 + __ |
| 13 + 7 + 46 = (13 + __) + 46 | 40 + 47 + 11 = (40 + __) + 11 |
| 8 × 9 = 9 × __ | 44 + 37 = 37 + __ |
| 11 + 27 = 27 + __ | 43 + 5 + 42 = (43 + __) + 42 |
四年级下册 运算律（笔算）（答案）
姓名：_______________
学号：_______________
用时：_______________
| 45 × 5 = 5 × __ 45 | 70 × 8 = 8 × __ 70 |
| 45 × 8 = 8 × __ 45 | 47 + 71 = 71 + __ 47 |
| 81 + 35 = 35 + __ 81 | 9 × 5 = 5 × __ 9 |
| (13 + 15) × 8 = 104 + __ 120 | 35 + 17 + 39 = (35 + __) + 39 17 |
| (10 + 20) × 9 = 90 + __ 180 | (9 + 11) × 3 = 27 + __ 33 |
| (5 + 2) × 2 = 10 + __ 4 | 97 × 6 = (100 - __) × 6 3 |
| 65 × 4 = 4 × __ 65 | 96 × 3 = 100 × 3 - __ × 3 4 |
| (9 + 15) × 7 = 63 + __ 105 | (16 + 4) × 9 = 144 + __ 36 |
| (20 + 7) × 7 = 140 + __ 49 | 47 + 10 + 48 = (47 + __) + 48 10 |
| 9 + 32 + 42 = (9 + __) + 42 32 | 37 + 92 = 92 + __ 37 |
| 41 + 36 + 32 = (41 + __) + 32 36 | (16 + 3) × 2 = 32 + __ 6 |
| 95 × 4 = 100 × 4 - __ × 4 5 | 98 × 2 = (100 - __) × 2 2 |
| 6 × 3 = 3 × __ 6 | 96 × 2 = 100 × 2 - __ × 2 4 |
| 37 + 89 = 89 + __ 37 | 52 + 22 = 22 + __ 52 |
| 5 + 27 + 38 = (5 + __) + 38 27 | 20 + 61 = 61 + __ 20 |
| 13 + 7 + 46 = (13 + __) + 46 7 | 40 + 47 + 11 = (40 + __) + 11 47 |
| 8 × 9 = 9 × __ 8 | 44 + 37 = 37 + __ 44 |
| 11 + 27 = 27 + __ 11 | 43 + 5 + 42 = (43 + __) + 42 5 |