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