2,7,5,8算二十四点!
问题描述:
2,7,5,8算二十四点!
答
1:(2 × 5 - 7) × 8
2:((2 × 5) - 7) × 8
3:(5 × 2 - 7) × 8
4:((5 × 2) - 7) × 8
5:8 × (2 × 5 - 7)
6:8 × ((2 × 5) - 7)
7:8 × (5 × 2 - 7)
8:8 × ((5 × 2) - 7)