I

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Across
  1. 2. Addition _ of Equality
  2. 4. result of addition
  3. 5. A multiplication factor
  4. 6. can be represented as a fraction
  5. 8. (O,0)
  6. 10. the length around a 2D shape
  7. 11. Multiplication property of _
  8. 12. a single mathematical expression
  9. 14. a plane split into fourths
  10. 15. one or more numbers to identify location
  11. 16. Non-changing number
  12. 17. Changing the order of 2 numbers doesn't change the result
  13. 18. the region of a 2D shape
Down
  1. 1. two numbers that multiply to 1
  2. 3. Changing two or more numbers doesn't change the result
  3. 7. two numbers that add to get 0
  4. 9. result of multiplication
  5. 13. can'r be represented by a ration