1/6+1/18+1/36+1/60+1/90=?另外要写过程的!

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1/6+1/18+1/36+1/60+1/90=?另外要写过程的!

1/6+1/18+1/36+1/60+1/90=?另外要写过程的!
1/6+1/18+1/36+1/60+1/90=?
另外要写过程的!

1/6+1/18+1/36+1/60+1/90=?另外要写过程的!
1/6+1/18+1/36+1/60+1/90
=3/18+1/18+1/36+1/60+1/90
=2/9+1/36+1/60+1/90
=8/36+1/36+1/60+1/90
=1/4+1/60+1/90
=15/60+1/60+1/90
=4/15+1/90
=24/90+1/90
=25/90
=5/18