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2018x2017一2017怎么算

2018x2017-2017 =2017x2018-2017×1 =2017×(2018-1) =2017×2017 =2017² =4068289

2017x2017一2018x2016 =2017x2017-(2017+1)x(2017-1) =2017x2017-2017x2017+1 =1

如图

2017×2017-2016×2018 =2017×2017-(2017-1)×(2017+1) =2017×2017-2017x2017 +1 =1

2018×2017-2017×2016-2016×2015+2015×2014=(2018-2016)x2017-(2016-2014)x2015=2x2017-2x2015=2x(2017-2015)=2x2=4 数学(mathematics或maths),是研究数量、结构、变化、空间以及信息等概念的一门学科,从某种角度看属于形式科学的一...

2018×20172017-2017×2018 =2018×2017×10001-2017×2018 =2017×2018×(10001-1) =4070306×10000 =40703060000

(201720172017-20172017-2017)/(201820182018-20182018-2018) =[2017×(100010001-10001-1)]/[2018×(100010001-10001-1)] =2017/2018

2017×2015/2018简便计算 2017×2015/2018 =(2018-1)*(2015/2018 =2018*2015/2018-2015/2018 =2015-2015/2018 =2014又3/2018

2017²-2016×2018 =2017²-(2017-1)(2017+1) =2017²-(2017²-1) =2017²-2017²+1 =1

2018+2017-2016-2015=42014+2013-2012-2011=4…………6+5-4-3=4有504个44×504+2+1=2016+3=2019

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