Mathematical Symbol Crossword

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Across
  1. 2. 3-5 is read 'three _____ five'
  2. 4. %
  3. 6. 3+5 is read 'three _____ five'
  4. 7. Greek symbol that starts with a 't'
  5. 9. !
  6. 11. verb for plus +
  7. 13. >
  8. 14. looks like an 8 on its side
  9. 15. <
Down
  1. 1. another word for 'multiplied by'
  2. 2. x ends in '-ation'
  3. 3. verb for take away -
  4. 5. =
  5. 8. ( )
  6. 10. 6 to the power 2 and 6 is the ____
  7. 12. 3.14159...