Ответ:

  1. \(810:9=90\);
  2. \(450:5=90\);
  3. \(460:2=230\);
  4. \(810:3=270\);
  5. \(340:2=170\);
  6. \(640:4=160\);
  7. \(420:3=140\);
  8. \(650:5=130\);
  9. \(240:3=80\);
  10. \(560:4=140\).