| 序号 | 题目:6,7,12,13 | |
|---|---|---|
| 1 | ((13 + 12) − 7) + 6 | |
| 2 | ((13 + 6) + 12) − 7 | |
| 3 | ((13 + 12) + 6) − 7 | |
| 4 | ((12 + 6) + 13) − 7 | |
| 5 | (13 + 12) − (7 − 6) | |
| 6 | (6 × (13 − 7)) − 12 | |
| 7 | (12 + (13 − 7)) + 6 | |
| 8 | (13 + (12 − 7)) + 6 | |
| 9 | (12 + 6) + (13 − 7) | |
| 10 | (13 + 6) + (12 − 7) | |
| 11 | 13 + ((12 + 6) − 7) | |
| 12 | 13 + (12 − (7 − 6)) | |
| 13 | 12 + (13 − (7 − 6)) | |
| 14 | 12 + (6 + (13 − 7)) | |
| 15 | 13 + (6 + (12 − 7)) | |
| 16 | 12 + ((13 + 6) − 7) | |