Numbers

1234567891011
Across
  1. 2. between 10 and 20
  2. 4. in the middle of Twenty and Thirty
  3. 7. ten+one
  4. 8. half an hour
  5. 9. seven x seven
  6. 11. 20-1:
Down
  1. 1. ten plus ten
  2. 3. six x two:
  3. 4. 2 times five
  4. 5. 6x5:
  5. 6. 2x4:
  6. 10. the first number