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