ARE YOU A MATH ROYAL?

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Across
  1. 2. making something smaller in size or quantity
  2. 4. making something bigger in size or quantity
  3. 6. the square ______ of 144 is 12
  4. 8. a fraction in which the numerator is greater than the denominator
  5. 9. numbers you can multiply together to get another number
  6. 10. a numerical quantity that is not a whole number
  7. 12. 0.12345
  8. 14. Numbers, symbols and operators grouped together that show the value of something
  9. 16. synonym of plus
  10. 17. per year
  11. 18. a relationship between two numbers of the same kind
Down
  1. 1. synonym of calculate
  2. 2. SALE! EVERYTHING IS 50% OFF
  3. 3. A number with no fractional part/ only whole numbers
  4. 5. a set of values that show an exact position
  5. 7. an accuate number close to the correct, although not exact
  6. 11. a synonym of 'power'
  7. 12. the action of which a big group is broken up into smaller groups
  8. 13. a time period of 2 weeks
  9. 15. written as a small number to the right and above the base number