Ответ:

  1. 53 + 5 = 58
  2. 23 + 7 = 30
  3. 44 − 2 = 42
  4. 42 + 30 = 72
  5. 56 − 30 = 26
  6. 80 − 14 = 66
  7. 12 + 9 = 21
  8. 91 − 6 = 85