Basic Set Principles

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Across
  1. 6. _____ numbers refer to counting numbers that start with 1
  2. 8. ∈ is an _____ of the set
  3. 9. ∅ means ___ set
  4. 10. < symbol for____ than
Down
  1. 1. The {} are ______ that house the elements of the set
  2. 2. _____ numbers refer to natural numbers that include 0
  3. 3. > symbol for ____ than
  4. 4. ∉ is ____ not an element of the set
  5. 5. _____ include both positive and negative whole numbers
  6. 7. _____ numbers include white numbers, rational numbers, irrational numbers, and natural numbers