5.58 6.3-0.63 15.8
问题描述：
5.58 6.3-0.63 15.8
答
5.58*0.63*10-0.63*15.8=0.63*(55.8-15.8)=0.63*40=25.2 ,
5.58 6.3-0.63 15.8
5.58*0.63*10-0.63*15.8=0.63*(55.8-15.8)=0.63*40=25.2 ,