( )/8=( )/40=0.8*0.625+( ):( )( )除以8+40分之( )=0.8*0.625=( )

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()/8=()/40=0.8*0.625+():()()除以8+40分之()=0.8*0.625=()()/8=()/40=0.8*0.625+():()()除以8+40分之()=0.8*0.625=

( )/8=( )/40=0.8*0.625+( ):( )( )除以8+40分之( )=0.8*0.625=( )
( )/8=( )/40=0.8*0.625+( ):( )
( )除以8+40分之( )=0.8*0.625=( )

( )/8=( )/40=0.8*0.625+( ):( )( )除以8+40分之( )=0.8*0.625=( )
( )除以8+40分之( )=0.8*0.625=( )
0.8=4/5=32/40
0.625=5/8
( 5)除以8*40分之( 32)=0.8*0.625=(1:2 )