place value

12345678
Across
  1. 1. predecessor of 671
  2. 3. 100 less than 523
  3. 6. Largest three digit number
  4. 8. six hundred and twelve
Down
  1. 2. 200 more than 564
  2. 4. successor of 398
  3. 5. 800 + 90 + 6
  4. 7. Three hundred and twenty five