2009分之2008乘以2008怎么算

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2009分之2008乘以2008怎么算
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2009分之2008乘以2008怎么算
2009分之2008乘以2008怎么算

2009分之2008乘以2008怎么算
=2008/2009×(2009-1)
=2008/2009×2009-2008/2009×1
=2008-2008/2009
=2007+1-2008/2009
=2007+1/2009
=2007又2009分之1

2008/2009×2008
=2008/2009×(2009-1)
=2008/2009×2009-2008/2009
=2008-2008/2009
=2007又1/2009

2009分之2008乘以2008=(1-1/2009)*2008= 2008-2008/2009=2007又1/2009

2008/2009*2008=(1-1/2009)*2008=2008-2008/2009=2007又1/2009

(2008/2009)*2008
=(2009-1)*(2009-1)/2009
=(2009*2009-2*2009+1)/2009
=2009*2009/2009-2*2009/2009+1/2009
=2009-2+1/2009
=2007又1/2009

=2008*(1-1/2009)=2007 1/2009