www.bhkl.net > 2016×2015/2017+2016/2017×2用简便运算

2016×2015/2017+2016/2017×2用简便运算

2017*2015/2016 =(2016^2-1)/2016 =2016-1/2016 =2015又2015/2016

原式 =2017x2016-2017x2017 =2017x(2016-2017) =2017x(-1) =-2017 供参考。

2016×2015/2017+2016/2017×2= 2016/2017×2015+2016/2017×2=2016/2017×(2015+2)=2016/2017×2017=2016。

2016 2017*2015=(2016+1)*(2016-1)=2016^2-1 2016/[2016^2-(2016^2-1)]=2016

=2016×2016÷(2016+2016/2015)=2016×2016÷(2016×(1+1/2015))=2016×2016÷(2016×2016/2015)=2016×2016÷[(2016×2016)/2015]=2015

=(2013+2019)/2016+ (2014+2018)/2016+ (2015+2017)/2016+ 2016/2016 =2+2+2+1 =7

2018-2017+2016-2015+…+4-3+2-1 =(2018-2017)+(2016-2015)+……+(4-3)+(2-1) =1+1+1+……+1+1 =1009

(2014+2015+2016+2017+2018)÷2016 =(2016×5)÷2016 =(2016÷2016)×5 =1×5 =5

用简便方法计算 2016/2017×2016 =2016/2017×(2017-1) =2016/2017×2017-2016/2017 =2016-2016/2017 =2015又1/2017

为什么结果是1008

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