| 序号 | 题目：4,6,8,9 | |
|---|---|---|
| 1 | (6 × (9 − 8)) × 4 | |
| 2 | (6 × 4) × (9 − 8) | |
| 3 | 6 × (4 × (9 − 8)) | |
| 4 | ((9 × 8) ÷ 4) + 6 | |
| 5 | (6 ÷ (9 − 8)) × 4 | |
| 6 | (9 × (8 ÷ 4)) + 6 | |
| 7 | (6 × 4) ÷ (9 − 8) | |
| 8 | 6 × (4 ÷ (9 − 8)) | |
| 9 | (8 ÷ (4 ÷ 9)) + 6 | |
| 10 | (9 ÷ (4 ÷ 8)) + 6 | |
| 11 | (8 × (9 ÷ 4)) + 6 | |
| 12 | 4 ÷ ((9 − 8) ÷ 6) | |
| 13 | 6 ÷ ((9 − 8) ÷ 4) | |
| 14 | 9 × (4 − (8 ÷ 6)) | |