Math

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Across
  1. 4. A set which the elements are countable
  2. 6. A' is called the ______ of A
  3. 8. set/ A set without an element
  4. 9. Sets are enclosed by pair of _______
  5. 10. It is the multiplicative identity element
Down
  1. 1. builder/ This is done by simply describing the characteristics of the elements
  2. 2. It is the sum of two real numbers which are said to be additive inverses or opposites
  3. 3. The answer in addition
  4. 5. It is the set whose elements are those which common to both sets
  5. 7. The members of a set