NUMBERS D.M.

123456789
Across
  1. 4. 10+10-2
  2. 6. 15-4
  3. 7. 9+4
  4. 8. 15-3
  5. 9. 39-20
Down
  1. 1. 10+4+2
  2. 2. 19-5
  3. 3. 10+10-3
  4. 5. 20-5
  5. 7. 100/10