Ответ:

  1. \(5\,136+2\,344=7\,480\).
  2. \(6\,503+1\,227=7\,730\).
  3. \(3\,428+2\,152=5\,580\).
  4. \(2\,137+7\,256=9\,393\).
  5. \(4\,605+5\,078=9\,683\).
  6. \(374+9\,617=9\,991\).
  7. \(1\,721+259=1\,980\).
  8. \(1\,934+9=1\,943\).
  9. \(87+1\,203=1\,290\).