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计算(-1)+(+2)+(-3)+(+4)+...+(-2007)+(+2008)+(-2009)+(2010)
初一数学的题目速度速度!
人气:455 ℃ 时间:2019-08-19 09:28:08
解答
(-1)+(+2)+(-3)+(+4)+...+(-2007)+(+2008)+(-2009)+(2010)
=(2-1)+(4-3)+...+(2010-2009)
=1+1+..+1
=1050
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