( )( ) = ( )( ) * ( ) = ( )( ) - ( )( ) 从1到9,且不重复.
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()()=()()*()=()()-()()从1到9,且不重复.()()=()()*()=()()-()()从1到9,且不重复.()()=()()*()=()()-()()从1到9,且不重复.68=1
( )( ) = ( )( ) * ( ) = ( )( ) - ( )( ) 从1到9,且不重复.
( )( ) = ( )( ) * ( ) = ( )( ) - ( )( ) 从1到9,且不重复.
( )( ) = ( )( ) * ( ) = ( )( ) - ( )( ) 从1到9,且不重复.
68=17*4=93-25