1994+1996+1998+2000+2002+2004+2006/1995+1997+1999+2001+2003+2005+2007等于多少

问题描述:

1994+1996+1998+2000+2002+2004+2006/1995+1997+1999+2001+2003+2005+2007等于多少

(1994+1996+1998+2000+2002+2004+2006)/(1995+1997+1999+2001+2003+2005+2007)
=2000×5/(2001×5)
=2000/2001

(1994+1996+1998+2000+2002+2004+2006)/(1995+1997+1999+2001+2003+2005+2007)=[(1994+2006)*7/2]/[(1995+2007)*7/2]=(1994+2006)/(1995+2007)=2*2000/(2*2001)=2000/2001