James' Math Crossword

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Across
  1. 1. half of ninety
  2. 5. 200,000 doubled plus 50,000
  3. 7. half of 20
  4. 8. 30+2
  5. 9. 300x6 + 306
Down
  1. 2. 10x10x10x50
  2. 3. 30+4
  3. 4. 200+400+403
  4. 6. 72-16
  5. 7. 100+2
  6. 10. triple 20 + 1