Teen Number Addition

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1234567891011
Across
  1. 6. Ten plus three
  2. 8. Ten plus ten
  3. 10. Eleven plus one
  4. 11. Eight plus ten
Down
  1. 1. Twelve plus three
  2. 2. Seventeen plus two
  3. 3. Fifteen plus two
  4. 4. Seven plus seven
  5. 5. Thirteen plus three
  6. 7. One plus ten
  7. 9. Six plus four