数学问题1989+1991+1993+1995+1997+1999+2001/1990+1992+1994+1996+1998+2000+2002=(1989+1991+1993+1995+1997+1999+2001)/(1990+1992+1994+1996+1998+2000+2002)=

问题描述:

数学问题1989+1991+1993+1995+1997+1999+2001/1990+1992+1994+1996+1998+2000+2002=
(1989+1991+1993+1995+1997+1999+2001)/(1990+1992+1994+1996+1998+2000+2002)=

1989+2001=1991+1999=1993+1997=1995*2
1990+2002=1992+2000=1994+1998=1996*2
所以分子=1995*7
分母=1996*7
结果=1995/1996