Math Puzzle

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1234567891011121314151617181920
Across
  1. 5. ✖️
  2. 7. 7=7
  3. 8. 5+9
  4. 10. shapes
  5. 11. 7+7
  6. 13. 4 to 8
  7. 15. —————————
  8. 16. 0.36
  9. 18. 1/2
  10. 20. You do this to find the length pf something
Down
  1. 1. -
  2. 2. ➗
  3. 3. Another word for addition
  4. 4. 8
  5. 6. Ones,tens,hundreds, thousands,etc
  6. 9. Outside of a shape
  7. 12. 8 divided by 4
  8. 14. +
  9. 17. Inside of a shape
  10. 19. Right