Ответ:

  1. 30 + 40 + 50 = 70 + 50 = 120.
  2. 9 + 100 + 1 = 9 + 1 + 100 = 110.
  3. 45 + 45 + 15 = 90 + 15 = 105.
  4. 60 + 60 + 60 = 180.