四年级下册 运算律（笔算）
姓名：_______________
学号：_______________
用时：_______________
| 98 × 7 = 100 × 7 - __ × 7 | 95 × 8 = (100 - __) × 8 |
| 79 + 40 = 40 + __ | (13 + 15) × 8 = 104 + __ |
| 10 × 9 = 9 × __ | 96 × 3 = (100 - __) × 3 |
| 22 + 49 + 16 = (22 + __) + 16 | (20 + 8) × 6 = 120 + __ |
| 95 × 3 = (100 - __) × 3 | 21 + 11 + 32 = (21 + __) + 32 |
| 46 + 27 + 43 = (46 + __) + 43 | 96 × 7 = (100 - __) × 7 |
| 38 + 31 + 47 = (38 + __) + 47 | 40 × 6 = 6 × __ |
| (18 + 16) × 3 = 54 + __ | 43 + 39 + 9 = (43 + __) + 9 |
| 20 + 38 = 38 + __ | 44 + 26 = 26 + __ |
| 91 × 6 = 6 × __ | (14 + 19) × 2 = 28 + __ |
| 4 + 40 + 38 = (4 + __) + 38 | 62 × 5 = 5 × __ |
| 13 + 87 = 87 + __ | 52 + 91 = 91 + __ |
| 99 × 2 = 100 × 2 - __ × 2 | 97 × 5 = (100 - __) × 5 |
| 95 × 3 = 100 × 3 - __ × 3 | 6 + 32 + 10 = (6 + __) + 10 |
| (5 + 15) × 3 = 15 + __ | (8 + 4) × 7 = 56 + __ |
| 42 + 27 + 47 = (42 + __) + 47 | (9 + 14) × 4 = 36 + __ |
| 25 + 21 + 31 = (25 + __) + 31 | 68 + 77 = 77 + __ |
| 60 × 8 = 8 × __ | 83 + 67 = 67 + __ |
四年级下册 运算律（笔算）（答案）
姓名：_______________
学号：_______________
用时：_______________
| 98 × 7 = 100 × 7 - __ × 7 2 | 95 × 8 = (100 - __) × 8 5 |
| 79 + 40 = 40 + __ 79 | (13 + 15) × 8 = 104 + __ 120 |
| 10 × 9 = 9 × __ 10 | 96 × 3 = (100 - __) × 3 4 |
| 22 + 49 + 16 = (22 + __) + 16 49 | (20 + 8) × 6 = 120 + __ 48 |
| 95 × 3 = (100 - __) × 3 5 | 21 + 11 + 32 = (21 + __) + 32 11 |
| 46 + 27 + 43 = (46 + __) + 43 27 | 96 × 7 = (100 - __) × 7 4 |
| 38 + 31 + 47 = (38 + __) + 47 31 | 40 × 6 = 6 × __ 40 |
| (18 + 16) × 3 = 54 + __ 48 | 43 + 39 + 9 = (43 + __) + 9 39 |
| 20 + 38 = 38 + __ 20 | 44 + 26 = 26 + __ 44 |
| 91 × 6 = 6 × __ 91 | (14 + 19) × 2 = 28 + __ 38 |
| 4 + 40 + 38 = (4 + __) + 38 40 | 62 × 5 = 5 × __ 62 |
| 13 + 87 = 87 + __ 13 | 52 + 91 = 91 + __ 52 |
| 99 × 2 = 100 × 2 - __ × 2 1 | 97 × 5 = (100 - __) × 5 3 |
| 95 × 3 = 100 × 3 - __ × 3 5 | 6 + 32 + 10 = (6 + __) + 10 32 |
| (5 + 15) × 3 = 15 + __ 45 | (8 + 4) × 7 = 56 + __ 28 |
| 42 + 27 + 47 = (42 + __) + 47 27 | (9 + 14) × 4 = 36 + __ 56 |
| 25 + 21 + 31 = (25 + __) + 31 21 | 68 + 77 = 77 + __ 68 |
| 60 × 8 = 8 × __ 60 | 83 + 67 = 67 + __ 83 |