2,4,4,5的24点答案:
1:(2+5)×4-4
2:((2+5)×4)-4
3:(2×5-4)×4
4:((2×5)-4)×4
5:(4×(2+5))-4
6:4×(2+5)-4
7:4×(2×5-4)
8:4×((2×5)-4)
9:(4+4)×(5-2)
10:(4×(5+2))-4
11:4×(5+2)-4
12:4×(5×2-4)
13:4×((5×2)-4)
14:(5+2)×4-4
15:((5+2)×4)-4
16:(5-2)×(4+4)
17:(5×2-4)×4
18:((5×2)-4)×4