Ответ:

  1. \(81:9=9\)
  2. \(9\times7=63\)
  3. \(54:9=6\)
  4. \(9\times9=81\)
  5. \(5\times9=45\)
  6. \(27:9=3\)
  7. \(9\times8=72\)
  8. \(45:9=5\)
  9. \(9\times10=90\)