Maths Crossword!!!!!!!!

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Across
  1. 3. 300x2+6
  2. 4. 71x3
  3. 5. 30x3+10+500+1
  4. 6. 1921-1732-188
  5. 7. 267 divided by 3
  6. 8. Half of 53
Down
  1. 1. 900+70+6
  2. 2. What is half of 1 232?