Basic Set Principles

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