Ответ:\(880-80-100=700\).\(640-40+200=800\).\(290+70=360\).\(680+50=730\).\(480:6=80\).\(260\cdot3=780\).\(140\cdot6=840\).\(360:9=40\).Ответ: 700; 800; 360; 730; 80; 780; 840; 40.