Ответ:

  1. \(40 - 27 = 13\);
  2. \(59 + 12 = 71\);
  3. \(53 + 18 = 71\);
  4. \(84 - 37 = 47\);
  5. \(80 - 13 = 67\);
  6. \(60 + 27 = 87\);
  7. \(46 + 29 = 75\);
  8. \(71 - 35 = 36\).