122222222222222212312312321111321312313的服务器个人个人前二个
1 1 -1 1 -2 1 1 -3 3 -1 1 -4 6 -4 1 1 -5 10 x 5 -1 1 -6 15 -
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相关问题
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（1+1/2+1/3+1/4+1/5）x（1/2+1/3+1/4+1/5+1/6）-（1+1/2+1/3+1/4+1/5
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2/3-1/8-1/6= 1/3+2/5+4/15= 1/4+2/5+3/20= 1-3/4-1/8= 4/5-1/3-
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(2+1/3+1/4+1/5)×(1/3+1/4+1/5+1/6)—(2+1/3+1/4+1/5+1/6)×(1/3+1
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1/1x3+1/2x4+1/3x5+1/4x6+...+1/10x12
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（-8）+10+2+（-1）-1+2-3-4+5-2/3+（-1/6）-（-1/4）-1/2-20+（-15）-（-17
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1/1*2+1/2*3+1/3*4+1/4*5+1/5*6+1/6*7
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1=5,2=10,3=15,4=20,5=1,6=?
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分数加减法1/3-2/15+3/35-4/63+5/99-6/143=1/2+1/3+1/4+1/5+1/6+1/7+1
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2/1 3/1 4/1 5/1 6/1 8/1 10/1 12/1 15/1 20/1
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1.（1+ 1/3+ 1/5+ 1/10+ 1/15+ 1/30）+（ 1/2+ 1/4+ 1/6+ 1/12+ 1/2