Crazy Maths

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Across
  1. 3. ten+three
  2. 5. thirty+ten
  3. 7. nine+twenty
  4. 9. fifteen+fifteen
  5. 10. forty+twentyone
Down
  1. 1. four+five
  2. 2. twentyfive+twentyfive
  3. 3. eighteen+four
  4. 4. ten+ten
  5. 6. seven+four
  6. 8. five+eleven