3.6*42.5*3.75--12.5*0.425*28
问题描述：
3.6*42.5*3.75--12.5*0.425*28
答
3.6*42.5*3.75-12.5*0.425*28
=0.9*42.5*15-50*0.425*7
=1350*0.425-350*0.425
=（1350-350）*0.425
=1000*0.425
=425