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