Addition Crossword

123456789
Across
  1. 3. 1 + 5
  2. 4. 2 + 1
  3. 6. 1 + 0
  4. 7. 6 + 4
  5. 9. 2 + 0
Down
  1. 1. 2+ 3
  2. 2. 4 + 3
  3. 4. 9 + 1
  4. 5. 3 + 5
  5. 8. 3 + 1