Piercen's crossword puzzle

Edit Answers
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Across
  1. 1. 7000+900+20+4
  2. 5. 9000+800+50+6
  3. 6. 50000 6000 800 90 4
  4. 7. (5x10) + (6x1)
Down
  1. 2. (2x1,000) + (8x100) + (5x10) + (7x1)
  2. 3. 4000+500+90
  3. 4. 3000+800+40+1
  4. 5. 90000+4000+300+50+7