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x2011

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

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

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

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

原式=2011(2012-2011-1) 、 =2011乘以0 =0

2010x201120112011一2011x201020102010 =2010x2011x1000100010001-2011x2010x1000100010001 =0

2011×20122012-2012×20112011 =2011×20122012-2012×20112011 =2011×2012×10001-2012×2011×10001 =2011×2012×(10001-10001) =0

显示屏是12.1英寸

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

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