Integer Crossword Puzzle

Edit Answers
12345678910111213
Across
  1. 1. -640/8
  2. 2. 10-21
  3. 7. -208x355
  4. 8. 31+50
  5. 9. 10729+13950
  6. 10. 31+38
  7. 12. 4-17
  8. 13. 393/3
Down
  1. 1. -828+-1493
  2. 3. 29x42
  3. 4. 5-22
  4. 5. 60/2
  5. 6. 2353-3295
  6. 7. -4216+-6747
  7. 11. 1091+2073
  8. 12. -18-(-3)