Addition and Subtraction

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Across
  1. 1. the sum of forty and two
  2. 5. the total of twentyfive and four
  3. 7. increasing fifteen by fiftyone
  4. 8. increasing eighty by eleven
Down
  1. 2. fifteen added to ten
  2. 3. thirty take away two
  3. 4. fourteen plus five
  4. 6. the difference between one hundred and fifty