原式=1-1/2+1/2-1/3+1/3-.-1/2009+1/2009-1/2010
1/(1*2)+1/(2*3)+1/(3*4)+1/(4*5)+1/(5*6).+1(2009*2010)=?
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相关问题
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1/2+1/4+3/4+1/6+3/6+5/6.2009/2010
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(1+3+5……+2009)-(2+4+6+……+2010)=?
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1+2+3+4+5+6...+2009-2010=?
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(1)︱1/3+(-1/2)︱+︱1/4+(-1/3)︱+︱1/5+(-1/4)︱+.+︱1/2010+(-1/2009
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1/1*2 + 1/2*3 + 1/3*4 + 1/4*5 + 1/5*6 + ……+ 1/2008*2009
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1*(2*3)/(3*4)*(4*5)/(5*6)*……*(2008*2009)/(2009*2010)等于?
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初一数学|1/3-1/2|+|1/4-1/3|+|1/5-1/4|+……+|1/2010-1/2009|
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简便计算:|1/3-1/2|+|1/4-1/3|+|1/5-1/4|+…+|1/2010-1/2009|
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[1+2+3+4+5+...+2009+2010]/[(1-1/1006)(1-1/1007)...(1-1/2009)
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计算:1-2+3-4+5-6+…+2009-2010=______.