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