Open and closed syllables two

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Across
  1. 2. important, needed
  2. 3. a small device used to calculate numbers
  3. 8. to divide
  4. 9. one of a kind, distinctive
  5. 10. a person who has come from another country
Down
  1. 1. a bright musical scale, opposite of minor
  2. 4. the middle or ordinary
  3. 5. what you do when you ride a bike
  4. 6. essential
  5. 7. a sad musical scale (opposite of a major scale); a child