Colbie's Number Puzzle

123456789101112131415161718
Across
  1. 1. 80000+2000+700+20
  2. 3. 89632-3594
  3. 5. 64978-39845
  4. 10. five million
  5. 11. 3924+6921
  6. 13. 5435+9000
  7. 16. 894+958
  8. 17. 95863-9461
  9. 18. six thousand seven hundred two
Down
  1. 2. 20000+5000+600+90+1
  2. 4. 31692 rounded to the greatest place
  3. 5. twenty four thousand
  4. 6. 35962 rounded to the nearest tens place
  5. 7. 76324 rounded to the greatest place
  6. 8. 50000+1000+600+40+2
  7. 9. 563276-64572
  8. 12. 90000+2000+500+10+6
  9. 13. 9875+7485
  10. 14. 45692 rounded to the nearest thousands place
  11. 15. seventy five thousand three hundred