1240*3.8+124*63-12.4*10简便算法怎么算
问题描述:
1240*3.8+124*63-12.4*10简便算法怎么算
答
1240*3.8+124*63-12.4*10
=124*38+124*63-124*1
=124*(38+63-1)
=124*100
=12400