3又3/4*1.25+37.5*0.975-375%,

问题描述:

3又3/4*1.25+37.5*0.975-375%,

3又3/4*1.25+37.5*0.975-375%
=3.75×1.25+3.75×9.75-3.75
=3.75×(1.25+9.75-1)
=3.75×10
=37.5