24点工具
1:(1 + 7) × (11 - 8)
2:(11 - (1 + 7)) × 8
3:(11 - 1 - 7) × 8
4:((11 - 1) - 7) × 8
5:(11 - 8) × (1 + 7)
6:(11 - 8) × (7 + 1)
7:(11 - (7 + 1)) × 8
8:(11 - 7 - 1) × 8
9:((11 - 7) - 1) × 8
10:8 × (11 - (1 + 7))
11:8 × (11 - 1 - 7)
12:8 × ((11 - 1) - 7)
13:8 × (11 - (7 + 1))
14:8 × (11 - 7 - 1)
15:8 × ((11 - 7) - 1)
16:(7 + 1) × (11 - 8)