Math Crossword Puzzle

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Across
  1. 2. lowest part of edge of something
  2. 5. are the familiar symbols used in pairs to group things together
  3. 7. finding the number in the middle of a set of numbers
  4. 9. a little number in the upper corner
  5. 11. the relative sizes of two or more volumes
  6. 13. magnitude of a real number without regard to its sign
  7. 15. the amount of 3-dimensional space an object occupies
  8. 16. a number used to multiply a variable
  9. 17. diagram consisting rectangles
  10. 18. greatest highest amount
  11. 19. a number that's not a fraction ; a whole number
Down
  1. 1. any of the four areas made by dividing a plane by an X and Y axis
  2. 3. a division within a system of classification
  3. 4. one part in every hundred
  4. 6. difference in size
  5. 7. least or smallest amount or quantity possible
  6. 8. to divide among several or many
  7. 10. a measurement of length in one direction
  8. 12. the values that divide a list of numbers into quarters
  9. 14. involving in action of identified things