2/3x( )=1.5x( )=5/11x( )=1

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2/3x()=1.5x()=5/11x()=12/3x()=1.5x()=5/11x()=12/3x()=1.5x()=5/11x()=12/3x(3/2)=1.5x(2/3)=5/11x(11/5)

2/3x( )=1.5x( )=5/11x( )=1
2/3x( )=1.5x( )=5/11x( )=1

2/3x( )=1.5x( )=5/11x( )=1
2/3x(3/2)=1.5x(2/3)=5/11x(11/5)=1

3/2
2/3
11/5

2/3x(3/2 )=1.5x(2/3 )=5/11x( 11/5)=1

2/3x(1.5 )=1.5x(2/3 )=5/11x( 2.2)=1

3/2
2/3
11/5
失误了

2/3x(3/2)=1.5x(2/3)=5/11x(11/5)=1