Math Nuts!!

123456789101112131415
Across
  1. 2. / five thousand six hundred seventy eight
  2. 8. / 1888 rounded to the nearest hundred
  3. 9. / 5999999 + 1
  4. 10. / 3000 + 100 + 10 + 1
  5. 13. / 1999 rounded to the nearest thousand
  6. 14. / 4000000 - 1
  7. 15. / 3000000 - 1
Down
  1. 1. / six thousand five hundred seventy eight
  2. 3. / 7999999 + 1
  3. 4. / 2898 + 162
  4. 5. / 6999999 + 1
  5. 6. / 1000 + 100 + 20 + 3
  6. 7. / 3678 rounded to the nearest ten
  7. 11. / one thousand two hundred thirty four
  8. 12. / 2000000 - 1
  9. 13. / 2000 + 900 + 90