Math Crossword Puzzle by Curtis

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Across
  1. 3. answer to a multiplication problem
  2. 4. the amount of fluid or dry measure a container will hold
  3. 7. A+(B+C)=(A+B)+C
  4. 9. the number of cubic units in a closed 3 dimensional shape
  5. 10. answer to a division problem
  6. 11. lines in the same plane that never intersect
  7. 15. angle an angle that measures 90*
  8. 18. the distance around a plane geometric figure
  9. 20. mathematical sentence with an equal sign
  10. 21. the number of square units needed to cover a region
  11. 22. makes a mathematical sentence true
  12. 23. any expression raised to the third power
  13. 24. two rays with a common endpoint
  14. 25. part of a line extending endlessly in one direction
Down
  1. 1. bottom number of a fraction
  2. 2. the distance of a number from zero on a number line
  3. 5. a+b=b+a
  4. 6. answer to an addition problem
  5. 8. a+-a=-a+a=0
  6. 12. bottom number of a fraction
  7. 13. answer to a subtraction problem
  8. 14. a+0=0+a=a
  9. 16. a parallelogram with four right angles
  10. 17. a subscript that indicates how many times a base is used as a factor
  11. 19. the set of whole numbers and their opposites