（1+1/3+1/5+1/10+1/18+1/30）/（1/2+1/4+1/6+1/12+1/20

(1+1/3+1/5+1/10+1/15+1/30)/(1/2+1/4+1/6+1/12+1/20+1/60)
=(30/30+10/30+6/30+3/30+2/30+1/30)/(30/60+15/60+10/60+5/60+3/60+1/60)
=(52/30)/(64/60)
=(26/15)/(16/15)
=26/15×15/16
=13/8本回答被网友采纳

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