用简便算法计算:47.6X2.3+4.76X78
问题描述:
用简便算法计算:47.6X2.3+4.76X78
答
47.6X2.3+47.6X7.8
=4.76(23+78)
=4.76(100+1)
=476+4.76
=480.76