38*1/4+17*0.25+45.25%的简便方法是?
问题描述:
38*1/4+17*0.25+45.25%的简便方法是?
答
38*1/4+17*0.25+45*25%
=38*1/4+17*1/4+45*1/4
=(38+17+45)*1/4
=100*1/4
=25