Math

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Across
  1. 1. A declarative sentence that makes sense and is true or false is called
  2. 3. A sum of a finite number of monomials is called
  3. 6. Two statements connected by the conjunction "and" form a statement called
  4. 7. The set containing all fractions is called the set of
Down
  1. 2. Statement formulas that are always true were called
  2. 4. Mathematical statements that are accepted as true without proof are called
  3. 5. The set of natural numbers is