Math Integer Crossword Puzzle

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Across
  1. 1. 2^2 =?
  2. 4. 20 - -4 =?
  3. 5. 20 + 5 =?
  4. 10. 7 + 7 = total
  5. 11. 5.8 + 10.3 =?
  6. 12. 20 + 20 (solve expression)
  7. 13. 56 + -3 =?
  8. 14. 5 x 5 =?
  9. 15. (10 - -5) + 2 =?
  10. 17. 33 - 3
  11. 18. a + 20 =?
  12. 20. 5 + 5 = 10
Down
  1. 2. -5 + -2 =?
  2. 3. |-5| =?
  3. 6. ? < 25 =?
  4. 7. -7 - -5 =?
  5. 8. 15 + -9 =?
  6. 9. 20/5 =?
  7. 16. -2 to 2
  8. 19. 33 < ?