负2,4,5,7的怎样组成24点

问题描述:

负2,4,5,7的怎样组成24点

(4-2)X(7+5)

3*(6-5+7)=24
9G
4S

(-2+4) X(5+7)=24

(5+7)(-2+4)

-2,4,5,7的24点答案:
1 (4 - 2) × (5 + 7)
2 (4 - 2) × (7 + 5)
3 (7 + 5) × (4 - 2)