7.8乘以0.2+78乘以0.98的简便方法怎么计算
问题描述:
7.8乘以0.2+78乘以0.98的简便方法怎么计算
答
7.8乘以0.2+78乘以0.98
=78*0.02+78*0.98
=78*(0.02+0.98)
=78*1
=78