有理数加减运算(-1)+(+2)+(-3)+(+4)+·····(-2001)+(2002)+(2003)+(2004)怎么解
问题描述:
有理数加减运算(-1)+(+2)+(-3)+(+4)+·····(-2001)+(2002)+(2003)+(2004)怎么解
答
(-1)+(+2)+(-3)+(+4)+·····(-2001)+(2002)+(2003)+(2004)
=(-1+2)+(-3+4)+·····(-2001+2002)+(2003+2004)
=1+1+……+1+1 (1002个1)
=1002