関連ワード:  a negative number multiplied by a negative number is    a negative number times a negative number is    is a negative number multiplied by a negative number positive    why is a negative number multiplied by a negative number always positive    why a negative number times a negative number is positive    if a negative number is multiplied by a negative number    what happens when a negative number is multiplied by a negative number    what happens when you add a negative number to a negative number    why does a negative number times a negative number  
結果 : a negative number multiplied by a negative number is