Ответ:

  1. 47 − 29 = 18;
  2. 62 − 34 = 28;
  3. 50 − 16 = 34;
  4. 27 − 18 = 9;
  5. 27 + 31 = 58;
  6. 34 + 38 = 72;
  7. 14 + 37 = 51;
  8. 68 + 23 = 91.