-1.53*0.75+1.53+二分之一+5分之4*1.53

问题描述:

-1.53*0.75+1.53+二分之一+5分之4*1.53

-1.53*0.75+1.53+二分之一+5分之4*1.53
=1.53(1-0.75)+0.5+0.8*1.53
=1.53(0.25+0.8)+0.5
=1.53*1.05+0.5
=1.6065+0.5
=2.1065