2011分之2010X2010
=(2011-1)X(2011-1)/2011
=(2011^2-2*2011+1)/2011
=2011-2+1/2011
=2009又1/2011
2011分之2010X2010,求简便算法.
相关文章
2011分之2010X2010
=(2011-1)X(2011-1)/2011
=(2011^2-2*2011+1)/2011
=2011-2+1/2011
=2009又1/2011
