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