Ответ:

  1. 45 + 27 = 72 > 70
  2. 100 − 36 = 64 = 64
  3. 72 − 18 = 54 > 50
  4. 35 + 48 = 83 = 83
  5. 91 − 27 = 64 < 65
  6. 63 + 17 = 80 = 80