用加减乘除,不加括号,1,2,3,4,5,6怎样算等于75?
问题描述：
用加减乘除,不加括号,1,2,3,4,5,6怎样算等于75?
答
共有21个算式：1*23-4+56=751*(23-4)+56=751*(23-4+56)=751*23-(4-56)=751*(23-(4-56))=751+23+45+6=7512+3+4+56=7512*3+45-6=75(12+3)*(4-5+6)=75(12+3)*(4-(5-6))=75(12-3)*(4+5)-6=7512*(3/4+5)+6=751+2+(3+4+5)*...