Ответ:

  1. 90 − 45 = 45
  2. 70 − 38 = 32
  3. 60 + 32 = 92
  4. 20 + 77 = 97
  5. 80 − 33 = 47
  6. 50 − 16 = 34
  7. 80 + 13 = 93
  8. 90 − 28 = 62
  9. 50 + 45 = 95
  10. 60 − 56 = 4
  11. 10 + 82 = 92
  12. 40 + 44 = 84
  13. 20 + 53 = 73
  14. 60 + 27 = 87
  15. 40 − 24 = 16
  16. 10 + 55 = 65
  17. 30 + 38 = 68