将3,-5,11,7这四个数用+,-,*,/四则运算算出24

问题描述:

将3,-5,11,7这四个数用+,-,*,/四则运算算出24

(7-3)×[11+(-5)]=24那2,3,-4,-9怎样运算呢?2×(-9)×(-4)÷3=24[(-9)-3]×[2+(-4)]=24