Do the calculations and write the numbers

123456789
Across
  1. 3. 19-3
  2. 4. 6+6
  3. 5. 7+6
  4. 7. 16+3
  5. 8. 20-2
  6. 9. 9+11
Down
  1. 1. 6+5
  2. 2. 16-2
  3. 3. 18-1
  4. 6. 19-4