Math Crossword Puzzle

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Across
  1. 2. Parenthesis, exponents, multiplication, division, addition, subtraction
  2. 3. The answer to a multiplication problem.
  3. 5. A line on which numbers are at certain intervals.
  4. 8. Value of the number of spaces before or after 0.
  5. 9. A Fixed value.
  6. 10. Arrangement of numbers, pictures, or objects formatted into rows and columns.
  7. 12. A number that never ends, March 13 at school.
  8. 14. The number before a variable.
  9. 15. The act of separating something into groups
  10. 16. A relation between two amounts.
  11. 19. A numerical quantity that is not a whole number like 3/4.
  12. 20. A whole number.
Down
  1. 1. Adding something to something.
  2. 4. A single thing.
  3. 6. Repeated addition of the same number.
  4. 7. Taking something away from something.
  5. 11. The total space taken up by a flat (2-D) surface or shape of an object.
  6. 13. The vertical axis on a graph.
  7. 17. A number or quantity that when multiplied with another produces a given number or expression.
  8. 18. Any number from 0 to 9 also a name for fingers.
  9. 19. One side of a 3D shape.