这个数学题等于多少越细越好哦[250+23.4/(1+17%)]
[250+23.4/(1+17%)]*17%-40 =
[250+23.4/(1+17%)]*17%-40 =[250+23.4/1.17]*0.17-40 =[250+20]*0.17-40 =270*0.17-40 =45.9-40 =5.9