math is superior

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Across
  1. 3. the answer to an addition problem
  2. 4. how tall something is
  3. 9. a numerical or constant quantity placed before and multiplying the variable in an algebraic expression
  4. 10. รท starts with D
  5. 12. 3,5,7,9,11,13,15, etc
  6. 13. - started with N
  7. 17. - starts with S
  8. 18. 2,4,6,8,10,12,14,16, etc
  9. 20. + starts with P
  10. 21. 2/4, 5/7, 8/9
  11. 22. %
  12. 23. + starts with A
  13. 24. 2 1/2
Down
  1. 1. x starts with M
  2. 2. > starts with G
  3. 5. the answer to a division problem
  4. 6. how long something is
  5. 7. a collection of symbols that jointly express a quantity
  6. 8. the answer to a subtraction problem
  7. 11. how wide something is
  8. 14. the part of mathematics in which letters and other general symbols are used to represent numbers and quantities in formulae and equations.
  9. 15. 54/9
  10. 16. how much is left over
  11. 18. "a statement that the values of two mathematical expressions are equal"
  12. 19. < starts with L