Number practice

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Across
  1. 2. Weeks in a year + seconds in a minute
  2. 3. 10% of 185
  3. 5. 7 x 1/2
  4. 9. 3-cubed x 1000
  5. 10. 18756 - 984
  6. 11. 7300 metres in km
  7. 13. 3/10
  8. 14. 25% as a decimal
  9. 15. one fifth of 1375
  10. 16. Area of a rectangle with lengths 18cm and 25cm
  11. 18. 8-squared x 100
  12. 19. Perimeter of a regular octagon with sides of 85cm
  13. 20. 868 + 297
Down
  1. 1. 897.75 / 7
  2. 3. 15.36 x 100
  3. 4. Inches in one million feet
  4. 6. 48735 / 100
  5. 7. 2693178 / 3
  6. 8. 600 x 70
  7. 10. 524 x 37
  8. 12. 12.8 metres in cm
  9. 16. one less than 5000
  10. 17. Days in a regular year