| 序号 | 题目:1,3,10,12 | |
|---|---|---|
| 1 | ((12 − 1) + 10) + 3 | |
| 2 | ((12 + 3) − 1) + 10 | |
| 3 | ((12 − 1) + 3) + 10 | |
| 4 | ((12 + 10) + 3) − 1 | |
| 5 | ((12 + 3) + 10) − 1 | |
| 6 | ((10 + 3) + 12) − 1 | |
| 7 | ((12 + 10) − 1) + 3 | |
| 8 | (12 + (10 − 1)) + 3 | |
| 9 | (12 + 3) + (10 − 1) | |
| 10 | (12 + 10) + (3 − 1) | |
| 11 | (10 + 3) + (12 − 1) | |
| 12 | (12 + (3 − 1)) + 10 | |
| 13 | 12 + ((10 + 3) − 1) | |
| 14 | 12 + ((10 − 1) + 3) | |
| 15 | 12 + (10 + (3 − 1)) | |