(2007-1)×2007分之2008-1 等于几,是等于2006吗
问题描述:
(2007-1)×2007分之2008-1 等于几,是等于2006吗
答
(2007-1)×(2008/2007)-1
=2007×2008/2007-1×2008/2007-1
=2008-2008/2007-1
=2008-1-1//2007-1
=2006-1/2007
=2005又2006/2007
(2007-1)×(2008-1)/2007
=2006×1
=2006