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x2011

2011x2011+2011/2012x2012+2012 =2011x2011+2011x2012/2012+2012 =2011x2011+2011+2012 =2011x(2011+1)+2012 =2011x2012+2012 =2012x(2011+1) =2012x2012 =4048144

20122012x2011-20112011x2012 =2012×10001x2011-2011×10001x2012 =0

原式=2011(2012-2011-1) 、 =2011乘以0 =0

2011÷2012x2011用简便方法计算 2011÷2012x2011 =2011/2012*2011 =2011*(1-1/2012) =2011-2011/2012 =2010又1/2012

2010x20112011-2011x20102010 =2010x2011×10001-2011x2010×10001 =0

20112011x2012-20122012x2011 =20112011x2011+20112011-20122012x2011 =20112011-(20122012-20112011)x2011 =20112011-10001x2011 =20112011-20112011 =0

一百块钱都不给我

2013x2011/2012 =(2012+1)(2012-1)/2012 =2012^2-1/2012 =2012-1/2012 =2011又2011/2012

20112011x2012-2011x20122012 =10001×2011×2012-2011×10001×2012 =0

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