2006÷2008分之2007

问题描述:

2006÷2008分之2007

2006÷(2007/2008)=2006×2008/2007=(2007-1)×2008/2007=2007×2008/2007-1×2008/2007=2008-2008/2007=2008-(1+1/2007)=2008-1-1/2007=2007-1/2007=2006又2006/2007望采纳~~~