NUMBER CONUNDRUM 🙄

123456789101112131415
Across
  1. 1. 600000+30000+5000 plus 800+30+6
  2. 3. 53765 rounded to the nearest 1000
  3. 7. 50000+2000+200+70+2
  4. 11. 1234859+13204
  5. 13. 42361-5362
  6. 14. one million
  7. 15. two million
Down
  1. 2. 346612-404
  2. 4. 4246256+6537
  3. 5. 821543+34264
  4. 6. 64583-5463
  5. 8. 2030853 rounded to the nearest 1000
  6. 9. 2567891 rounded to the nearest 10000
  7. 10. 50000+3000+300+70+2
  8. 12. three million