Maths Crossword

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Across
  1. 3. 5 + 1 =
  2. 5. 2 + 2 =
  3. 7. 18 + 2 =
  4. 8. 7 + 3 =
  5. 9. 3 + 2 =
  6. 10. 11 + 7 =
  7. 12. 6 + 5 =
Down
  1. 1. 5 + 3 =
  2. 2. 8 + 6 =
  3. 3. 8 + 8 =
  4. 4. 6 + 1 =
  5. 5. 10 + 5 =
  6. 6. 5 + 4 =
  7. 11. 2 + 1 =