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