Răspuns :
( + 56 ) : ( - 8) - ( - 45 ) : ( - 9) = - 12
= ( - 7) - ( + 5 )
= - 7 - 5
= - 12
= ( - 7) - ( + 5 )
= - 7 - 5
= - 12
( + 56 ) : ( - 8 ) - ( - 45 ) : ( - 9 ) =
= - 7 + 45 : ( - 9 )
= - 7 - 5
= - 12
= - 7 + 45 : ( - 9 )
= - 7 - 5
= - 12