関連ワード:  does a negative times a negative negative equal a positive    does a negative times a negative always equal a positive    does a negative divided by a negative equal a positive    does a negative minus a negative equal a positive    does a negative multiplied by a negative equal a positive    is a negative times a negative equal a positive    can a negative times a negative equal a positive    is a negative multiplied by a negative equal a positive    does a negative number divided by a negative number equal a positive number    does a negative number minus a negative number equal a positive number  
結果 : does a negative times a negative negative equal a positive