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