Billionaire Rounding: Place Value to the Rescue!

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Across
  1. 3. Round 3,276,908,765 to the nearest billion
  2. 5. Round 5,489,721,654 to the nearest billion
  3. 7. Round 9,142,765,309 to the nearest billion
  4. 11. Round 5,432,109,876 to the nearest hundred million
  5. 13. Round 9,876,543,210 to the nearest hundred million
  6. 15. Round 2,109,876,543 to the nearest hundred million
  7. 16. Round 2,987,654,321 to the nearest billion
  8. 17. Round 1,234,567,890 to the nearest billion
  9. 18. Round 5,678,912,345 to the nearest hundred million
  10. 19. Round 4,321,678,234 to the nearest billion
  11. 20. Round 7,890,123,456 to the nearest hundred million
Down
  1. 1. Round 3,210,987,654 to the nearest hundred million
  2. 2. Round 7,856,432,198 to the nearest billion
  3. 4. Round 4,567,890,123 to the nearest hundred million
  4. 6. Round 7,654,321,987 to the nearest billion
  5. 8. Round 8,901,234,567 to the nearest hundred million
  6. 9. Round 6,432,109,876 to the nearest hundred million
  7. 10. Round 8,765,432,189 to the nearest billion
  8. 12. Round 1,098,765,432 to the nearest hundred million
  9. 14. Round 6,543,210,987 to the nearest billion