2007*2007/2008
=(2008-1)(2008-1)/2008
=(2008^2-2*2008+1)/2008
=2008^2/2008-2*2008/2008+1/2008
=2008-2+1/2008
=2006+1/2008
=2006又1/2008
急求2007*2007/2008简算过程
2007*2007/2008
=(2008-1)(2008-1)/2008
=(2008^2-2*2008+1)/2008
=2008^2/2008-2*2008/2008+1/2008
=2008-2+1/2008
=2006+1/2008
=2006又1/2008