関連ワード:  does a negative subtract a negative equal a positive    does a negative plus a negative equal a positive    can a negative plus a negative equal a positive    does a negative plus a negative always equal a positive    in math does a negative plus a negative equal a positive    does a negative number plus a negative number equal a positive    does a negative number minus a negative number equal a positive number    does subtracting a negative equal a positive    a negative plus a negative equals a positive movie    a negative plus a negative equals a positive right  
結果 : does a negative subtract a negative equal a positive