| 序号 | 题目：3,4,11,13 | |
|---|---|---|
| 1 | ((13 × 3) − 11) − 4 | |
| 2 | ((11 × 3) + 4) − 13 | |
| 3 | ((13 × 3) − 4) − 11 | |
| 4 | ((11 × 3) − 13) + 4 | |
| 5 | (4 × 3) × (13 − 11) | |
| 6 | (11 × 3) − (13 − 4) | |
| 7 | (13 + 11) × (4 − 3) | |
| 8 | (4 × (13 − 11)) × 3 | |
| 9 | (3 × (13 − 11)) × 4 | |
| 10 | (13 × (4 − 3)) + 11 | |
| 11 | (13 × 3) − (11 + 4) | |
| 12 | 13 + (11 × (4 − 3)) | |
| 13 | (13 + 11) ÷ (4 − 3) | |
| 14 | (13 ÷ (4 − 3)) + 11 | |
| 15 | 13 + (11 ÷ (4 − 3)) | |