Amelia's Crossword

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Across
  1. 4. seventy-two thousand three hundred
  2. 5. one million seventy-two thousand eight hundred twenty two
  3. 9. 8921+4360000
  4. 12. 4800 rounded to the nearest thousand
  5. 13. 336921-100000
  6. 15. 49999950+50
Down
  1. 1. 4560 rounded to the nearest hundred
  2. 2. 500+200+30
  3. 3. 4000+300+20+2
  4. 6. two thousand one
  5. 7. 689032-1890321
  6. 8. 5000+20+1
  7. 10. 7321-1000
  8. 11. 20563+2000000
  9. 14. rhymes with pun