Ответ:

  1. 83 = 80 + 3.
  2. 34 = 30 + 4.
  3. 87 = 80 + 7.
  4. 54 = 50 + 4.
  5. 17 = 10 + 7.
  6. 72 = 70 + 2.
  7. 16 = 10 + 6.
  8. 63 = 60 + 3.