2004/2005×2003简便计算

问题描述:

2004/2005×2003简便计算
还有 2004/2005×2006

2004/2005×2003
=2004/2005×(2005-2)
=2004/2005×2005-2004/2005×2
=2004-4008/2005
=2002+2-4008/2005
=2002+2/2005
=2002又2/2005