ARE YOU A MATH ROYAL?

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