Math

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Across
  1. 4. kind of math
  2. 6. =
  3. 8. surgery operation
  4. 9. 6:2=2
  5. 10. order
Down
  1. 1. difference
  2. 2. a square
  3. 3. music
  4. 5. instrument piano
  5. 7. 1/2