Crossword 1.2 through 6.2

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Across
  1. 3. The distance around a polygon.
  2. 6. A natural number greater than 1 whose only factors are 1 and itself.
  3. 8. The addends of an algebraic expression.
  4. 9. The number factor of a variable term.
  5. 12. The _____ are 0, 1, 2, 3, …
  6. 14. Two numbers are _____ of each other if their product is 1.
  7. 16. The top number in a fraction.
  8. 17. A combination of operations on variables and numbers.
  9. 18. The middle number in a set of numbers written in numerical order.
Down
  1. 1. A term that is a number only.
  2. 2. A mathematical statement that two ratios are equal.
  3. 4. A(n) _____ can be written in the form ‘expression = expression.”
  4. 5. The _____ of a number is its distance from zero on a number line.
  5. 7. The number in a set of numbers that occurs most often.
  6. 10. The letter used to represent a number.
  7. 11. An expression that indicates the quotient of two quantities.
  8. 13. A value of a variable that makes an equation a true statement.
  9. 15. The position of each digit in a number determines its _____.