怎样简便计算8.1乘以2.31加8.1乘以3.87除以1.8

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怎样简便计算8.1乘以2.31加8.1乘以3.87除以1.8怎样简便计算8.1乘以2.31加8.1乘以3.87除以1.8怎样简便计算8.1乘以2.31加8.1乘以3.87除以1.8(8.1×2.31+

怎样简便计算8.1乘以2.31加8.1乘以3.87除以1.8
怎样简便计算8.1乘以2.31加8.1乘以3.87除以1.8

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