Work on numbers

12345678910
Across
  1. 3. what's seven + four
  2. 5. what's twenty seven + five
  3. 7. what's thirty + sixteen
  4. 8. what's twenty + twenty
  5. 9. what's three + two
  6. 10. what's fifteen + fifteen
Down
  1. 1. what's twenty + nine
  2. 2. what's nineteen + six
  3. 4. what's six + six
  4. 6. what's ten + three
  5. 8. what's twenty five+ twenty five