1/2+1/6+1/12+1/20+1/30+1/42+1/56+1/72+1/90+1/110=1/1*2+1/2*3+……+1/10*11=(1/1-1/2)+(1/2-1/3)+……+(1/10-1/11)=1/1-1/11=10/11
计算1/2+1/6+1/12+1/20+1/30+1/42+1/56+1/72+1/90+1/110=?
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相关问题
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计算1/2+1/6+1/12+1/20+1/30+1/42+1/56+1/72+1/90+1/110=?
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1／2＋1／6＋1／12＋1／20＋1／30＋1／42＋1／56＋1／72＋1／90＋1／110＝?
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1/2+1/6+1/12+1/20+1/30+1/42+1/56+1/72+1/90+1/110 +······1/99
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计算：1/2+1/6+1/12+1/20+/+1/30+1/42+1/56+1/72+1/90
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计算1/2+1/6+1/12+1/20+1/30+1/42+1/56+1/72+1/90
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1/6+1/12+1/20+1/30+1/42+1/56+1/72+1/90简便计算
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1/2+1/6+1/12+1/20+1/30+1/42+1/56+1/72+190+1/110=?
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不通分计算1/2+1/6+1/12+1/20+1/30+1+42+1/56+1/72+1/90
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2\1-6\1-12\1-20\1-30\1-42\1-56\1-72\1-90\1
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1/2+1/6+1/12+1/20+1/30+1/42+1/56+1/72+1/90=