2008X2007/2009=

问题描述:

2008X2007/2009=

2008X2007/2009=4030056/2009=2006

2008X2007/2009
= ( 2009 -1) x 2007 / 2009
= 2009x2007/ 2009 - 2007/2009
= 2007 - 2007/2009
= 2006 又 2/ 2009

2008X2007/2009
=(2009-1)X2007/2009
=2009x2007/2009-2007/2009
=2007-2007/2009
=2006又2/2009
如果本题有什么不明白可以追问,

2006.00099