四年级下册 运算律（笔算）
姓名：_______________
学号：_______________
用时：_______________
| 2 + 39 + 9 = (2 + __) + 9 | 62 + 25 = 25 + __ |
| (11 + 11) × 7 = 77 + __ | 49 + 47 + 1 = (49 + __) + 1 |
| 1 + 15 + 41 = (1 + __) + 41 | 91 + 44 = 44 + __ |
| (3 + 19) × 8 = 24 + __ | 97 × 6 = 100 × 6 - __ × 6 |
| 98 × 8 = 100 × 8 - __ × 8 | 93 × 3 = 3 × __ |
| 34 × 6 = 6 × __ | 91 × 5 = 5 × __ |
| (3 + 19) × 6 = 18 + __ | 39 + 80 = 80 + __ |
| 68 + 47 = 47 + __ | 96 × 8 = (100 - __) × 8 |
| 34 + 20 = 20 + __ | (15 + 3) × 9 = 135 + __ |
| (5 + 4) × 3 = 15 + __ | 71 + 23 = 23 + __ |
| 44 + 11 + 1 = (44 + __) + 1 | 82 × 5 = 5 × __ |
| (20 + 17) × 8 = 160 + __ | 99 × 6 = (100 - __) × 6 |
| 34 × 5 = 5 × __ | 92 × 7 = 7 × __ |
| (3 + 15) × 4 = 12 + __ | (12 + 11) × 6 = 72 + __ |
| 35 + 10 + 20 = (35 + __) + 20 | 68 × 7 = 7 × __ |
| 67 + 48 = 48 + __ | 43 + 34 + 21 = (43 + __) + 21 |
| 4 + 14 + 45 = (4 + __) + 45 | 54 + 18 = 18 + __ |
| 41 + 11 + 33 = (41 + __) + 33 | 97 × 7 = 100 × 7 - __ × 7 |
四年级下册 运算律（笔算）（答案）
姓名：_______________
学号：_______________
用时：_______________
| 2 + 39 + 9 = (2 + __) + 9 39 | 62 + 25 = 25 + __ 62 |
| (11 + 11) × 7 = 77 + __ 77 | 49 + 47 + 1 = (49 + __) + 1 47 |
| 1 + 15 + 41 = (1 + __) + 41 15 | 91 + 44 = 44 + __ 91 |
| (3 + 19) × 8 = 24 + __ 152 | 97 × 6 = 100 × 6 - __ × 6 3 |
| 98 × 8 = 100 × 8 - __ × 8 2 | 93 × 3 = 3 × __ 93 |
| 34 × 6 = 6 × __ 34 | 91 × 5 = 5 × __ 91 |
| (3 + 19) × 6 = 18 + __ 114 | 39 + 80 = 80 + __ 39 |
| 68 + 47 = 47 + __ 68 | 96 × 8 = (100 - __) × 8 4 |
| 34 + 20 = 20 + __ 34 | (15 + 3) × 9 = 135 + __ 27 |
| (5 + 4) × 3 = 15 + __ 12 | 71 + 23 = 23 + __ 71 |
| 44 + 11 + 1 = (44 + __) + 1 11 | 82 × 5 = 5 × __ 82 |
| (20 + 17) × 8 = 160 + __ 136 | 99 × 6 = (100 - __) × 6 1 |
| 34 × 5 = 5 × __ 34 | 92 × 7 = 7 × __ 92 |
| (3 + 15) × 4 = 12 + __ 60 | (12 + 11) × 6 = 72 + __ 66 |
| 35 + 10 + 20 = (35 + __) + 20 10 | 68 × 7 = 7 × __ 68 |
| 67 + 48 = 48 + __ 67 | 43 + 34 + 21 = (43 + __) + 21 34 |
| 4 + 14 + 45 = (4 + __) + 45 14 | 54 + 18 = 18 + __ 54 |
| 41 + 11 + 33 = (41 + __) + 33 11 | 97 × 7 = 100 × 7 - __ × 7 3 |