Ответ:

  1. 100000 − 1 = 99999
  2. 55899 + 1 = 55900
  3. 747999 + 1 = 748000
  4. 959999 + 1 = 960000
  5. 240500 − 1 = 240499
  6. 604000 − 1 = 603999
  7. 70000 − 1 = 69999
  8. 553999 + 1 = 554000
  9. 765000 − 1 = 764999