the numbers

123456789101112131415161718
Across
  1. 1. fifteen+twenty five
  2. 3. one+ten
  3. 4. five+eleven
  4. 6. twenty one+twenty nine
  5. 8. eight+nine
  6. 11. five+three
  7. 12. two+seven
  8. 14. eleven+nine
  9. 17. seven+eight
  10. 18. zero+ten
Down
  1. 2. five+seven
  2. 4. thirteen+fifty seven
  3. 5. eleven+two
  4. 6. nine+five
  5. 7. thirty three+fifty seven
  6. 9. sixteen+two
  7. 10. ten+nine
  8. 13. nineteen+forty one
  9. 15. thirty+fifty
  10. 16. twenty four+six