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