3.79*1.25+6.21/0.8简便方法
问题描述:
3.79*1.25+6.21/0.8简便方法
答
3.79*1.25+6.21/0.8
=3.79*1.25+6.21*1.25
=(3.79+6.21)*1.25
=10*1.25
=12.5