(-0.25+7/4)÷【0.5-(0.75)*(4/3-4)】

问题描述:

(-0.25+7/4)÷【0.5-(0.75)*(4/3-4)】

原式=6/4÷(1/2-3/4*-8/3)
=6/4÷(5/2)
=6/4*2/5
=6/10
=0.6