简便计算:1995+1996+1997+1998+1999+2000.

问题描述:

简便计算:1995+1996+1997+1998+1999+2000.

1995+1996+1997+1998+1999+2000,
=(2000-5)+(2000-4)+(2000-3)+(2000-2)+(2000-1)+2000,
=2000×6-(5+4+3+2+1),
=12000-15,
=11985.