1/3=2:( )=4/( ) =( )/15=6/( )三分之一=2比 ( )=4除以( )=十五分之 ( ) =( )分之六

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1/3=2:( )=4/( ) =( )/15=6/( )
三分之一=2比 ( )=4除以( )=十五分之 ( ) =( )分之六

1/3=2:( 6)=4/(12 ) =(5 )/15=6/( 18)

6
12
5
18

1/3=(1*2)/(3*2)=2/6
=(1*4)/(3*4)=4/12
=(1*3)/(5*3)=3/15
=(1*6)/(3*6)=6/18