Ответ:

  1. \(7\times2=14\);
  2. \(27:3=9\);
  3. \(16:2=8\);
  4. \(3\times3=9\);
  5. \(32+28-20=60-20=40\);
  6. \(16+36+18=52+18=70\);
  7. \(90-24+14=66+14=80\);
  8. \(63+27-56=90-56=34\).