Ответ:

  1. 8 + 6 + 9 + 4 = 27
  2. 7 − 3 + 7 + 9 = 20
  3. 4 + 2 + 8 + 9 = 23
  4. 5 + 9 − 3 + 4 = 15
  5. 1 + 7 + 6 + 1 = 15
  6. 4 + 2 + 9 + 9 = 24
  7. 6 + 8 + 1 + 9 = 24
  8. 3 + 2 + 9 + 4 = 18
  9. 2 + 4 + 5 + 9 = 20
  10. 9 − 5 + 7 + 9 = 20
  11. 3 + 9 + 3 + 9 = 24
  12. 6 − 4 + 9 + 9 = 20