Math Subtraction

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Across
  1. 2. 26 - 13
  2. 4. 52 - 31
  3. 6. 36 - 24
  4. 8. 87 - 5
  5. 9. 90 - 45
Down
  1. 1. 79 - 20
  2. 3. 90 - 30
  3. 4. 85 - 55
  4. 5. 99 - 21
  5. 7. 99 - 9