Do The Math!

12345678
Across
  1. 2. 365-348
  2. 4. 90-30
  3. 6. 38-19
  4. 7. 19+22
Down
  1. 1. 12+8
  2. 3. 21+12
  3. 5. 19-7
  4. 8. 20+10