Add N Sub 3

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Across
  1. 4. The operation used to compare two numbers.
  2. 5. The difference obtained when a number is subtracted from itself.
  3. 6. This does no changes when the order of numbers is changed.
  4. 7. The numbers that are added.
Down
  1. 1. The answer obtained in addition.
  2. 2. Equivalent of 100 hundred
  3. 3. The answer obtained in subtraction.