怎样简便计算8.1乘以2.31加8.1乘以3.87除以1.8
问题描述:
怎样简便计算8.1乘以2.31加8.1乘以3.87除以1.8
答
(8.1×2.31+8.1×3.87)÷1.8
=[8.1×(2.31+3.87)]÷1.8
=8.1×6÷1.8
=27