Subtraction Crossword

1234567
Across
  1. 2. 10-4
  2. 3. 9-4
  3. 4. 18-8
  4. 5. 12-3
  5. 6. 15-7
Down
  1. 1. 20-9
  2. 2. 14-7
  3. 3. 7-3
  4. 4. 5-2
  5. 7. 4-2