The undone puzzle

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Across
  1. 3. what is 7020 rounded to the nearest thousand
  2. 4. 2,000-1,000=
  3. 5. what's 1,000+600+50+6=
  4. 6. what's 10,000+100+50+5=
  5. 8. what's 2,000+500+60+7=
  6. 9. What is 8,120 rounded to the nearest thousand
  7. 11. what's one thousand in number form
  8. 14. what's two thousand in number form
  9. 15. what's 9,120 rounded to the nearest hundred
  10. 16. 6,000-1,000=
  11. 17. what's 5,600 rounded to the nearest thousand
Down
  1. 1. what's 1,010 rounded to the nearest thousand
  2. 2. 20,000+20,000=
  3. 5. what's 1,000+500+60+9=
  4. 6. what is 1,520 rounded to the nearest hundred
  5. 7. 6,000+6,000
  6. 10. what is five thousand five hundred twenty in number form
  7. 12. 5,000+5,000
  8. 13. what's 60,000+500+30+3=