Ordinal numbers

123456789
Across
  1. 1. 2nd
  2. 4. 1st
  3. 7. 30th
  4. 8. 20th
  5. 9. 100th
Down
  1. 2. 9th
  2. 3. 15th
  3. 4. 4th
  4. 5. 3rd
  5. 6. 11th
  6. 8. 12th