2+6+12+20+30+42=112
小学数学六年级上册基础训练1*2\1+2\1*3\1+3\1*4\1+4\1*5\1+5\1*6\1+6\1*7\1答案
5个回答
相关问题
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六年级数学题/(1*2)+1/(2*3)+1/(3*4)+1/(4*5)+1/(5*6)+.+1/(99*100)=?
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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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五年级下册数学急给好评1/2+1/3=3/4+1/2=1/4+6/1=1-4/5=5/6-1/2=1/2-1/3=1/4
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1/2+2/+3/4+4/5+5/6+6/7的平方+1/2*(1/2+2/3+3/4+4/5+5/6+6/7)-(1+1
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:(1/2+2/3+3/4+4/5+5/6+6/7)+(1/2+2/3+3/4+4/5+5/6+6/7)*1/2—(1+
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∣3/1-2/1∣+∣4/1-3/1∣+∣5/1-4/1∣+∣6/1-5/1∣+∣7/1-6/1∣+∣8/1-7/1∣+
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1/1*2+1/2*3+1/3*4+1/4*5+1/5*6+1/6*7+```+1/29*30
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1/1*2+1/2*3+1/3*4+1/4*5+1/5*6=1/6*7+1/7*8+1/8*9
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1/1*2+1/2*3+1/3*4+1/4*5+1/5*6+1/6*7+1/7*8...1/49*50
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已知 1/2*3=1/2-1/3,1/3-1/4=1/12 计算1/3*4+1/4*5+1/5*6+1/6*7+1/7*