Ответ:

  1. \(691+181=872\);
  2. \(736-393=343\);
  3. \(416+361=777\);
  4. \(702-290=412\);
  5. \(3\cdot6=18\);
  6. \(2\cdot5=10\);
  7. \(15:3=5\);
  8. \(18:2=9\).