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当前位置:首页>>关于2016-2015×2017的资料>>

2016-2015×2017

2016²-2015×2017 =2016²-(2016-1)(2016+1) =2016²-(2016²-1) =2016²-2016²+1 =1

2O18╳2017一2017╳2016一2016╳2015+2015╳2014简便计算 解: 2O18×2017-2017×2016-2016×2015+2015×2014 =(2018-2016)×2017-(2016-2014)×2015 =2×2017-2×2015 =2×(2017-2015) =2×2 =4

2016²-2017×2015 =2016²-(2016+1)×(2016-1) =2016²-[2016²-1] =2016²-2016²+1 =1。

2018*2016-2017*2016-2016*2015+2015*2014简便计算 =2016x(2018-2017)-2015x(2016-2014) =2016x1-2015x2 =2016-4030 =-2014

=(2017-1)x2017分之2015 =2017x2017分之2015-2017分之2015 =2014又2017分之2

2017×2016/2015 =2017×(1+1/2015) =2017+2017/2015 =2018+2/2015 =2018又2/2015

2016x2017一2015x2015 =2016x(2015+2)-2015x2015 =2016x2015+2016x2-2015x2015 =(2016-2015)x2015+4032 =1x2015+4032 =2015+4032 =6047

2O18╳2017一2017╳2016一2016╳2015+2015╳2014简便计算 解: 2O18×2017-2017×2016-2016×2015+2015×2014 =(2018-2016)×2017-(2016-2014)×2015 =2×2017-2×2015 =2×(2017-2015) =2×2 =4

2015-2017*2016 = -4 064 257

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