Number Theory

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Across
  1. 2. almost every number
  2. 4. counting with 0
  3. 5. way to find lcm and gcf
  4. 6. counting
  5. 8. one integer over another
  6. 9. natural number and opposites
Down
  1. 1. top
  2. 3. bottom
  3. 7. I for e.g.