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