Algebra 1 is fun

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Across
  1. 3. absolute value never =
  2. 6. A number with a variable
  3. 9. a number alone
  4. 12. {1,2,3,4...}
  5. 13. Algebra is a fun subject
  6. 14. a positive or negative whole number
  7. 15. anything to the zero power is
  8. 16. x<7 or x≥4
Down
  1. 1. 2/3 and 3/2
  2. 2. non-terminating non-repeating decimal numbers
  3. 4. power to a power and you?
  4. 5. when dividing like bases ___ the exponent
  5. 7. any number that can be written as integer÷integer
  6. 8. a+(b+c)=(b+c)+a
  7. 10. Natural number plus zero
  8. 11. -3>x>4