Math Puzzle

1234567891011121314151617
Across
  1. 2. An substance that is refined for sale
  2. 4. The order of arithmetic numbers
  3. 6. The act of taking something apart
  4. 7. that divisible by two
  5. 10. The process or skill of multiplying
  6. 11. Showing the ratio of equal parts to the whole as a result of dividing a whole into equal parts
  7. 12. Symbol of subtraction
  8. 14. Numbers that have a remainder of one when divided by two
  9. 16. The prodcess of subtract something from something else
  10. 17. The process of adding something to something else
Down
  1. 1. Fractions whose numerator is less than the denominator
  2. 3. The cluster created by counting numbers and zero
  3. 5. Fractions with an integer before the fraction
  4. 8. Fractions whose numerator is more than the denominator
  5. 9. Symbol of addition
  6. 13. He is the first mathematichian who is write the first book about algebria
  7. 15. A result obtained by dividing one quantity by another