Algebra Crossword Puzzle

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Across
  1. 2. The smallest multiple that a group of numbers share
  2. 5. Changing the way factors are grouped
  3. 7. Showing the relationship between points on a graph
  4. 9. PEMDAS
  5. 12. To do the opposite
  6. 15. When rearranging an addition/multiplication problem, the answer stays the same.
  7. 19. Any fraction with a denominator that isn't zero
  8. 20. Multiplying a number by other numbers in parenthesis
Down
  1. 1. To find the value of something
  2. 3. The positive version of a number
  3. 4. The number that is multiplied by itself to get a specific number
  4. 6. A simpler way of writing an expression
  5. 8. Two equations with the same solution
  6. 10. Comparing two amounts of something
  7. 11. A decimal with endless, non-repeating digits after the decimal point
  8. 13. A simpler way of writing really big or small numbers
  9. 14. A visual way of figuring out if a line is a function
  10. 16. The biggest factor that a group of numbers share
  11. 17. A number with 1 in its denominator
  12. 18. To find the solution to a problem