関連ワード:  does a negative plus a negative a positive    is a negative plus a negative a positive    does a negative times a negative a positive    is a negative plus a negative a positive number    does a negative plus a negative equal a positive    does a negative plus a negative equal a positive number    does negative plus negative become positive    does a negative plus a negative always equal a positive    does a negative plus a negative give you a positive    is a negative times a negative a positive number  
結果 : does a negative plus a negative a positive