Crossword Puzzle on Integers

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Across
  1. 4. 1234x-163=
  2. 6. (13- -58)x67=
  3. 10. (58+600)- -56=
  4. 11. -50x76=
  5. 13. (63x54)- -65=
  6. 14. -90+-13=
  7. 15. -121/122=
Down
  1. 1. 100- -60 =
  2. 2. (-95-68)- -58=
  3. 3. 50x-50=
  4. 5. -124-134=
  5. 7. -80+-86=
  6. 8. 821+51=
  7. 9. -200x-300=
  8. 12. 6x-8=