Big number fun

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Across
  1. 2. 99,800-30,047
  2. 4. three hundred seventy six thousand nine hundred one
  3. 6. 8,000,000+800,000+30,000+9,000+700+7
  4. 7. eight million nine hundred ninety thousand one hundred thirty two
  5. 11. 5,235,433+2,114,332
  6. 14. 33,615+60,002
  7. 16. 2,000,000+6,299,000
  8. 18. 600,000+60,000+4,000+100+90
  9. 19. seven thousand nine hundred ten
  10. 21. 9,000,000+20,000+8,000+600+30+7
  11. 23. 700,000+50,000+1,000+700+4
  12. 24. six million four hundred ninety thousand thousand five hundred thirty seven
Down
  1. 1. nine million nine hundred ninety eight thousand seven hundred twenty five
  2. 3. 566,085+423,814
  3. 5. 1,000,000+400,000+90,000+5,000+900+40+3
  4. 8. round 899,990 to the nearest 100,000
  5. 9. 9,005,000-7,085,321
  6. 10. 400,000+9,000+300+40+5
  7. 12. round 9,878,332 to the nearest thousand
  8. 13. five hundred fifty seven thousand six hundred ninety
  9. 15. 600,000+90,000+4,000+900+30+3
  10. 16. round 8,179 to the nearest hundred
  11. 17. three hundred ninety four thousand five hundred one
  12. 20. 7,505-5,989
  13. 22. 2,001+4,011