NUMBERS

12345678910
Across
  1. 3. Before nine
  2. 5. The last number after 99
  3. 7. The second after zero
  4. 8. +
  5. 10. Combine between one and two
Down
  1. 1. X
  2. 2. After hundred
  3. 4. Before 39
  4. 6. =
  5. 9. The first number