用3,-5,7,-13组成24点(用四则运算)
问题描述:
用3,-5,7,-13组成24点(用四则运算)
答
((3*-5)+7)*-33*((-5*-3)-7)3*((-3*-5)-7)((-5*3)+7)*-3((-5*-3)-7)*3(7+(3*-5))*-3(7+(-5*3))*-3-3*((3*-5)+7)-3*((-5*3)+7)((-3*-5)-7)*3-3*(7+(3*-5))-3*(7+(-5*3))