分类：教育/科学-理工学科-数学
问题：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
=
回答：[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