NUMBERS

123456789
Across
  1. 4. nine+nine
  2. 5. ten+three
  3. 8. twelve+seven
  4. 9. six+nine
Down
  1. 1. thirteen+one
  2. 2. eleven+five
  3. 3. seven+five
  4. 6. fourteen+six
  5. 7. eight+three