2001分之2005*2006

问题描述:

2001分之2005*2006

2005/2001x2006
=2005/2001x(2001+5)
=2005/2001x2001+2005/2001x5
=2005+(1+4/2001)x5
=2005+5+20/2001
=2010又20/2001