(6+8+10,+2010)-(5+7+9+,+2009)怎样简便算
问题描述:
(6+8+10,+2010)-(5+7+9+,+2009)怎样简便算
答
原式
=(6-5)+(8-7)+(10-9)+...+(2010-2009)
=1+1+1+...+1(共有1003个1相加)
=1003