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