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