四年级下册 运算律（笔算）
姓名：_______________
学号：_______________
用时：_______________
| 32 × 4 = 4 × __ | (16 + 8) × 5 = 80 + __ |
| (20 + 7) × 3 = 60 + __ | 96 × 7 = 100 × 7 - __ × 7 |
| 40 × 9 = 9 × __ | 7 × 9 = 9 × __ |
| 96 × 8 = 100 × 8 - __ × 8 | 28 + 15 = 15 + __ |
| 13 + 16 + 22 = (13 + __) + 22 | 36 + 48 + 47 = (36 + __) + 47 |
| 51 + 35 = 35 + __ | 21 + 31 + 7 = (21 + __) + 7 |
| 4 + 40 + 39 = (4 + __) + 39 | 27 × 9 = 9 × __ |
| (15 + 19) × 5 = 75 + __ | 40 + 34 = 34 + __ |
| 28 + 18 + 13 = (28 + __) + 13 | (9 + 7) × 2 = 18 + __ |
| (10 + 5) × 5 = 50 + __ | (20 + 6) × 2 = 40 + __ |
| (7 + 4) × 8 = 56 + __ | (1 + 12) × 3 = 3 + __ |
| 95 × 5 = (100 - __) × 5 | 99 × 2 = (100 - __) × 2 |
| 95 × 6 = (100 - __) × 6 | (16 + 17) × 2 = 32 + __ |
| 97 × 2 = (100 - __) × 2 | 10 + 71 = 71 + __ |
| 97 × 7 = 100 × 7 - __ × 7 | 38 + 49 + 1 = (38 + __) + 1 |
| 92 × 8 = 8 × __ | 81 × 9 = 9 × __ |
| (14 + 7) × 6 = 84 + __ | 72 + 85 = 85 + __ |
| 22 + 42 + 19 = (22 + __) + 19 | 91 + 41 = 41 + __ |
四年级下册 运算律（笔算）（答案）
姓名：_______________
学号：_______________
用时：_______________
| 32 × 4 = 4 × __ 32 | (16 + 8) × 5 = 80 + __ 40 |
| (20 + 7) × 3 = 60 + __ 21 | 96 × 7 = 100 × 7 - __ × 7 4 |
| 40 × 9 = 9 × __ 40 | 7 × 9 = 9 × __ 7 |
| 96 × 8 = 100 × 8 - __ × 8 4 | 28 + 15 = 15 + __ 28 |
| 13 + 16 + 22 = (13 + __) + 22 16 | 36 + 48 + 47 = (36 + __) + 47 48 |
| 51 + 35 = 35 + __ 51 | 21 + 31 + 7 = (21 + __) + 7 31 |
| 4 + 40 + 39 = (4 + __) + 39 40 | 27 × 9 = 9 × __ 27 |
| (15 + 19) × 5 = 75 + __ 95 | 40 + 34 = 34 + __ 40 |
| 28 + 18 + 13 = (28 + __) + 13 18 | (9 + 7) × 2 = 18 + __ 14 |
| (10 + 5) × 5 = 50 + __ 25 | (20 + 6) × 2 = 40 + __ 12 |
| (7 + 4) × 8 = 56 + __ 32 | (1 + 12) × 3 = 3 + __ 36 |
| 95 × 5 = (100 - __) × 5 5 | 99 × 2 = (100 - __) × 2 1 |
| 95 × 6 = (100 - __) × 6 5 | (16 + 17) × 2 = 32 + __ 34 |
| 97 × 2 = (100 - __) × 2 3 | 10 + 71 = 71 + __ 10 |
| 97 × 7 = 100 × 7 - __ × 7 3 | 38 + 49 + 1 = (38 + __) + 1 49 |
| 92 × 8 = 8 × __ 92 | 81 × 9 = 9 × __ 81 |
| (14 + 7) × 6 = 84 + __ 42 | 72 + 85 = 85 + __ 72 |
| 22 + 42 + 19 = (22 + __) + 19 42 | 91 + 41 = 41 + __ 91 |