简算:(2009+1/2007)*1/2008

问题描述:

简算:(2009+1/2007)*1/2008

(2009+1/2007)×1/2008
=2009/2008+1/4030056
=1又2007/4030056+1/4030056
=1又2008/4030056
=2008/2007

原式
=2009/2008+1/2007-1/2008
=1+1/2008+1/2007-1/2008
=2008/2007

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