1/6+1/12+1/36+1/66+1/99=?123

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1/6+1/12+1/36+1/66+1/99=?123
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1/6+1/12+1/36+1/66+1/99=?123
1/6+1/12+1/36+1/66+1/99=?
123

1/6+1/12+1/36+1/66+1/99=?123
1/6+1/12+1/36+1/66+1/99
=(1/6+1/66)+(1/12+1/36)+1/99
=2/11+1/9+1/99
=10/33

(2+4+6)/2=6黑球

1/6+1/12+1/36=5/18
1/66+1/99=5/(18*11)
5/(18*11)+5/18=10/33

先乘除，后加减