2007×2007÷2008
=2007×(2008-1)÷2008
=2007×(1-1/2008)
=2007-2007/2008
=2006又1/2008
其实原题应该是:2007×2007/2008
=(2008-1)×2007/2008
=2007-2007/2008
=2006又1/2008
2007×2007÷2008
=2007×(2008-1)÷2008
=2007×(1-1/2008)
=2007-2007/2008
=2006又1/2008
其实原题应该是:2007×2007/2008
=(2008-1)×2007/2008
=2007-2007/2008
=2006又1/2008