Warm up maths crossword

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Across
  1. 3. 9700 -(6 X 12)
  2. 6. Three-quarters of 3436
  3. 8. Weeks in a year multiplied by one million
  4. 12. 9 X 112233
  5. 13. 90,000 - (8X8)
  6. 14. 278072 / 8
  7. 16. Median of 16893, 16982, 17776, 17983, 28201
  8. 17. 8 X 111
  9. 18. 7680 Rounded to the nearest thousand
  10. 19. Mean of 290, 207 and 355
Down
  1. 1. 38.6 X 100
  2. 2. Days in a regular year
  3. 4. 4200 / 7
  4. 5. 40 X 3
  5. 7. one less than fifty-thousand
  6. 9. Inches in a foot to the power 4
  7. 10. 6-Cubed
  8. 11. 4/5 as a percentage
  9. 15. The mid-value of 9540 and 1002
  10. 16. 1608 + 1984