1-2+3-4+.+2001-2002+2003-2004的值
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1-2+3-4+.+2001-2002+2003-2004的值
1-2+3-4+.+2001-2002+2003-2004的值
1-2+3-4+.+2001-2002+2003-2004的值
1-2+3-4+.+2001-2002+2003-2004的值
=[1-2]+[3-4]+.+[2003-2004]
=[-1]+[-1]+.+[-1]
=-1*1002
=-1002
1-2+3-4+......+2001-2002+2003-2004
=(1-2)+(3-4)+……+(2001-2002)+(2003-2004)
=(-1)×1002
=-1002
(-1)+(+2)+(-3)+(+4)+……(-2001)+(+2002)+(-2003)+(+2004)
=1-2+3-4+5-6+…+2001-2002+2003-2004
=(1-2)+(3-4)+(5-6)+.....+(2001-2002)+(2003-2004)
=-1*(2004/2)
=-1*1002
=-1002
2001/1+2002/2+2001/3+2001/4+.+2001/2001
(2002/2+2002/4+2002+6+...+2002/2002)-(2002/1+2002/3+2002/5+...+2002/2001)算清楚!
(2/2002+4/2002+6/2002+...+2002/2002)-(1/2002+3/2002+5/2002+...2001/2002)
(1-2)*(2-3)*(3-4).*(2001-2002)*(2002-2003)
1+(-2)+3+(-4).+2001+(-2002)
1-2+3-4-6+.+2001-2002
(1-2)(2-3)(3-4)...(2001-2002)=?
1/1*2+1/2*3+1/3*4+.1/2001*2002+1/2002*2003
(-1)+(+2)+(-3)+(+4)+...(-2001)+(+2002)+(-2003)+(+2004)
2003-2002+2001-2000+.+5-4+3-2+1
1-2+3-4+5-6+…+2001-2002简算
计算(-1)+(+2)+(-3)+(+4)+...+(-2001)+(+2002)+(-2003)+(+2004)
如何计算(-1)+(+2)+(-3)+(+4)+...(-2001)+(+2002)+(-2003)+(+2004)
(1+3+5+.+2001+2003)-(2+4+6+.+2000+2002)
1-2+3-4+5-6.+2001-2002
1-2+3-4+……+2001-2002+2003
1-2+3-4+……+2001-2002,
1-2+3-4……+2001-2002