Ответ:

  1. \(68+24=92\);
  2. \(53+47=100\);
  3. \(536+247=783\);
  4. \(975-638=337\);
  5. \(319+562=881\);
  6. \(258+328=586\);
  7. \(764-237=527\);
  8. \(867-539=328\);
  9. \(971-346=625\).