Math crossword

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Across
  1. 2. Two dashes above each other
  2. 4. Another word for Multiplication
  3. 6. The number next to the variable 7x
  4. 8. The dash in front of a number
  5. 11. Another word for addition
  6. 14. 15_12=3
  7. 15. _ of 10 is 1,2,5,and 10
  8. 17. 16_2=8
  9. 19. X is a very common one of these
  10. 20. x,/,+,- are all what
  11. 22. 2_2=4
  12. 23. Semi circles around numbers
  13. 25. Semi circles with divots in them
Down
  1. 1. Any nonzero number raised to the zero power
  2. 3. The number of times the base is used as a factor
  3. 5. The number that does not have a variable
  4. 7. A number over a number
  5. 9. 5_5=25
  6. 10. The top number of a fraction
  7. 12. 1,2,3,4,5,6,7,8 are all what
  8. 13. The number used as a factor
  9. 16. Another word for subtraction
  10. 18. The bottom number of a fraction
  11. 21. The dot in the middle of a number
  12. 24. When there is a single digit coefficient multiplied by an exponent is called _notation