( ):12=0.75=6:( )=36分之( )

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():12=0.75=6:()=36分之()():12=0.75=6:()=36分之()():12=0.75=6:()=36分之()(9):12=0.75=6:(8)=36分之(27)解:0.75=3

( ):12=0.75=6:( )=36分之( )
( ):12=0.75=6:( )=36分之( )

( ):12=0.75=6:( )=36分之( )
( 9):12=0.75=6:( 8)=36分之(27 )

:0.75=3/4
= 3×3/4×3
=9/12
=3×2/4×2
=3×9/4×9

(9 ):12=0.75=6:(8 )=36分之( 27)

(9 ):12=0.75=6:(8 )=36分之(27 )