计算:101×0.25+101×35%+101×2/5=?1/2×【1/5÷(1/4+1)】

问题描述:

计算:101×0.25+101×35%+101×2/5=?1/2×【1/5÷(1/4+1)】

101×0.25+101×35%+101×2/5
=101×(0.25+35%+2/5)
=101×1
=101
1/2×【1/5÷(1/4+1)】
=1/2×【1/5÷5/4】
=1/2×4/25
=2/25