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2016×2015/2017+2016/2017×2用简便运算

假设x=2016,那么 原式=(x-1)x+x(x+1)+(x-1)(x+1) =3x^2-1 将x=2016代入,则 原式=3*2016^2-1=12192767 码字不易,敬请采纳。

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。

2016×2017+2017+2015分之2016×2016 =2017x(2016+1)+2015x(2016/2015)+1x(2016/2015) =2017x2017+2016+1+1/2015 =2017x(2017+1)+1/2015 =2017x2018+1/2015 =2000x2018+10x2018+7x2018+1/2015 =4036000+20180+14126+1/2015 =4070306+1/2015 =40703...

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

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

答:2015/2015又2016/2015+1/2017 =2015*2016/(2015*2017)+1/2017 =2017/2017 =1

2018+2017-2016-2015+2014+2013-2012-2011+……-4-3+2+1 =(2018+2017)-(2016-2014)-(2015-2013)-(2012-2010)-(2011-2009)-……-(4-2)-(3-1) =2018+2017-2×2016÷4×2 =2018+2017-2016 =2019

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

(2014+2018)÷2016+(2015+2017)÷2016+2016÷2016 =2+2+1 =5

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