関連ワード:  a negative plus a negative equals positive    a negative times a negative equals positive    a negative plus a negative equals a positive movie    a negative plus a negative equals a positive right    does a negative plus a negative equals positive    can a negative plus a negative equal positive    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  
結果 : a negative plus a negative equals positive