rational numbers

123456
Across
  1. 4. Integers have ______ properties of operation
  2. 5. Both fractions and rational number are
  3. 6. The denominator of a fraction should be
Down
  1. 1. The sum of two rational numbers is always a/an _____.
  2. 2. How to Identify Rational Numbers?
  3. 3. How many rational numbers are there between two rational numbers?