Maths Crossword

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Across
  1. 1. Half of one hundred
  2. 4. Four multiplied by four
  3. 7. Three groups of five
  4. 8. Double forty five
Down
  1. 1. Nine times five
  2. 2. A quarter of twenty
  3. 3. Five times six
  4. 5. Three quarters of twelve
  5. 6. One third of twenty one
  6. 9. A quarter of twelve