Math words and equations

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Across
  1. 3. Has no value if alone
  2. 5. 828÷9
  3. 7. An angle over 90 degrees.
  4. 9. The thing this word search is about
  5. 12. 2x3
  6. 13. 34x3
  7. 14. the answer to a multiplication problem
Down
  1. 1. the answer to a division problem
  2. 2. 7x3
  3. 4. 378÷9
  4. 6. The only even prime number
  5. 8. The answer to an addition problem
  6. 10. An angle below 90 degrees.
  7. 11. A fraction with a whole number and a fraction less than one
  8. 15. A 90 degree angle