第1个回答 2012-12-12
通分180，答案是23/20
第2个回答 2009-06-14
2/3+1/6+1/9+1/12+1/15+1/18
=2/3+1/6+1/9+1/18+1/12+1/15
=2/3+1/6+（2/18+1/18）+1/3-1/4+1/6-1/10
=2/3+1/6+1/6+1/3+1/6-1/4-1/10
=1+1/3-7/20
=1+20/60-21/60
=59/60本回答被网友采纳
=2/3+1/6+1/9+1/18+1/12+1/15
=2/3+1/6+（2/18+1/18）+1/3-1/4+1/6-1/10
=2/3+1/6+1/6+1/3+1/6-1/4-1/10
=1+1/3-7/20
=1+20/60-21/60
=59/60本回答被网友采纳
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