Number Puzzle

123456789
Across
  1. 2. one thousand more than 3786
  2. 5. eight hundred fifteen
  3. 6. the place value of 5 in 59,991
  4. 7. 5000 + 300 + 40 + 8
  5. 8. the product of 45 and 100
  6. 9. the greatest five digit number
Down
  1. 1. the standard form of twenty three thousand eight hundred five
  2. 3. 6884-100
  3. 4. six thousand ten
  4. 7. the predecessor of 6000