Maths

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Across
  1. 2. half of 30
  2. 4. 6+5
  3. 7. 10+20
  4. 8. 15+5
Down
  1. 1. 6+6
  2. 3. 3+2
  3. 5. 25-7
  4. 6. 9-3
  5. 9. 10-2