问题
填空题
(1+3+5+7+…+2005)-(2+4+6+8+…+2004)=______.
答案
(1+3+5+7+…+2005)-(2+4+6+8+…+2004),
=(1-2)+(3-4)+(5-6)+…+2005,
=1002×(-1)+2005,
=1003.
故填:1003.
(1+3+5+7+…+2005)-(2+4+6+8+…+2004)=______.
(1+3+5+7+…+2005)-(2+4+6+8+…+2004),
=(1-2)+(3-4)+(5-6)+…+2005,
=1002×(-1)+2005,
=1003.
故填:1003.