関連ワード:  a negative plus a positive equals a negative    a negative times a positive equals a negative    a negative divided by a positive equals a negative    a negative plus a negative equals a positive movie    a negative plus a negative equals a positive right    a negative times a negative equals a positive movie    a negative times a negative equals a positive. true false    a negative times a negative equals a positive right    a negative times a negative equals a positive gif    a negative times a negative equals a positive movie quote  
結果 : a negative plus a positive equals a negative