丨1/2007-1/2006丨+丨1/2008-1/2007丨-丨1/2006-1/2006丨=?
问题描述:
丨1/2007-1/2006丨+丨1/2008-1/2007丨-丨1/2006-1/2006丨=?
答
题目错了,最后是1/2008-1/2006吧?
丨1/2007-1/2006丨+丨1/2008-1/2007丨-丨1/2008-1/2006丨
=1/2006-1/2007+1/2007-1/2008-1/2006+1/2008
=0