関連ワード:  is a negative add a negative a positive    does a negative add a negative equal a positive    does a negative add a negative make a positive    is a negative minus a negative a positive    is a negative minus a negative a positive number    is a negative minus a negative always a positive    when you add a negative and a negative is it a positive    what is a negative add a positive    what happens when you add a negative with a positive  
結果 : is a negative add a negative a positive