Multiplication of 2 and 4

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Across
  1. 2. Nine pairs
  2. 5. 2 times 2
  3. 6. Half of twenty
  4. 7. Five groups of four
  5. 9. 4 times 4
  6. 10. 1 times 2
Down
  1. 1. 3 times 4
  2. 3. 2 times 4
  3. 4. Four times ten
  4. 8. Six groups of four