math crossword puzzle

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Across
  1. 1. 43 x 12
  2. 4. 9 x(-7)
  3. 7. 31x13
  4. 9. positive visual
  5. 10. line of integers
  6. 11. positive or negative number
Down
  1. 2. 84/12
  2. 3. negative visual
  3. 5. 12- (-13)
  4. 6. to tell if below zero or above zero
  5. 7. 67+(-12)
  6. 8. 31-(23)