8/11除3+1/3X3/11

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8/11除3+1/3X3/118/11除3+1/3X3/118/11除3+1/3X3/118/11除3+1/3X3/11=8/33+1/11=8/33+3/33=11/33=1/3=1/3X(8/11

8/11除3+1/3X3/11
8/11除3+1/3X3/11

8/11除3+1/3X3/11
8/11除3+1/3X3/11
=8/33+1/11
=8/33+3/33
=11/33
=1/3

=1/3X(8/11+3/11)=1/3