Maths

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Across
  1. 1. 12 groups of 9
  2. 3. 99 / 9
  3. 5. half of 90
  4. 8. double 9
  5. 10. 9 multiplied by 1
  6. 11. 9 multiplied by 0
  7. 13. 7 x 9
Down
  1. 2. 11 nines
  2. 4. 9 x 10
  3. 6. 9 multiplied by itself
  4. 7. 8 lots of 9
  5. 9. 3 lots of 9
  6. 12. 6 times 9
  7. 14. double 9 then double again