四年级下册 运算律（笔算）
姓名：_______________
学号：_______________
用时：_______________
| (4 + 20) × 3 = 12 + __ | 15 + 21 + 48 = (15 + __) + 48 |
| 50 × 4 = 4 × __ | 98 × 7 = 7 × __ |
| 60 + 74 = 74 + __ | 43 + 6 + 2 = (43 + __) + 2 |
| (17 + 1) × 6 = 102 + __ | 15 × 7 = 7 × __ |
| 47 + 32 + 35 = (47 + __) + 35 | 18 + 50 + 31 = (18 + __) + 31 |
| 98 × 6 = 100 × 6 - __ × 6 | 35 × 7 = 7 × __ |
| 42 + 39 + 16 = (42 + __) + 16 | 95 × 2 = 100 × 2 - __ × 2 |
| 48 + 10 = 10 + __ | 98 × 2 = 100 × 2 - __ × 2 |
| 98 × 5 = 100 × 5 - __ × 5 | 5 + 44 + 10 = (5 + __) + 10 |
| 96 × 9 = 9 × __ | 75 + 37 = 37 + __ |
| 21 × 7 = 7 × __ | 28 + 10 + 4 = (28 + __) + 4 |
| 96 × 9 = 100 × 9 - __ × 9 | (7 + 2) × 4 = 28 + __ |
| 15 + 38 + 24 = (15 + __) + 24 | (3 + 3) × 7 = 21 + __ |
| 30 + 16 + 36 = (30 + __) + 36 | (19 + 1) × 9 = 171 + __ |
| 65 × 8 = 8 × __ | 15 + 81 = 81 + __ |
| (5 + 12) × 9 = 45 + __ | 33 + 24 + 24 = (33 + __) + 24 |
| 94 + 73 = 73 + __ | 95 × 2 = 100 × 2 - __ × 2 |
| 55 + 22 = 22 + __ | (15 + 13) × 3 = 45 + __ |
四年级下册 运算律（笔算）（答案）
姓名：_______________
学号：_______________
用时：_______________
| (4 + 20) × 3 = 12 + __ 60 | 15 + 21 + 48 = (15 + __) + 48 21 |
| 50 × 4 = 4 × __ 50 | 98 × 7 = 7 × __ 98 |
| 60 + 74 = 74 + __ 60 | 43 + 6 + 2 = (43 + __) + 2 6 |
| (17 + 1) × 6 = 102 + __ 6 | 15 × 7 = 7 × __ 15 |
| 47 + 32 + 35 = (47 + __) + 35 32 | 18 + 50 + 31 = (18 + __) + 31 50 |
| 98 × 6 = 100 × 6 - __ × 6 2 | 35 × 7 = 7 × __ 35 |
| 42 + 39 + 16 = (42 + __) + 16 39 | 95 × 2 = 100 × 2 - __ × 2 5 |
| 48 + 10 = 10 + __ 48 | 98 × 2 = 100 × 2 - __ × 2 2 |
| 98 × 5 = 100 × 5 - __ × 5 2 | 5 + 44 + 10 = (5 + __) + 10 44 |
| 96 × 9 = 9 × __ 96 | 75 + 37 = 37 + __ 75 |
| 21 × 7 = 7 × __ 21 | 28 + 10 + 4 = (28 + __) + 4 10 |
| 96 × 9 = 100 × 9 - __ × 9 4 | (7 + 2) × 4 = 28 + __ 8 |
| 15 + 38 + 24 = (15 + __) + 24 38 | (3 + 3) × 7 = 21 + __ 21 |
| 30 + 16 + 36 = (30 + __) + 36 16 | (19 + 1) × 9 = 171 + __ 9 |
| 65 × 8 = 8 × __ 65 | 15 + 81 = 81 + __ 15 |
| (5 + 12) × 9 = 45 + __ 108 | 33 + 24 + 24 = (33 + __) + 24 24 |
| 94 + 73 = 73 + __ 94 | 95 × 2 = 100 × 2 - __ × 2 5 |
| 55 + 22 = 22 + __ 55 | (15 + 13) × 3 = 45 + __ 39 |