Rational Numbers

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Across
  1. 5. Combination of whole natural and negative nos.
  2. 6. Additive identity of rational numbers
  3. 8. method of representing rational numbers
  4. 10. A form where p/q has no common factors
  5. 11. Number in the form of p/q, where q!=0
  6. 13. This operation by zero is not defined
  7. 15. name the property a+b = b+a
  8. 16. All natural numbers including zero
Down
  1. 1. name the property a+b = c
  2. 2. Rational number without having its sign
  3. 3. Additive inverse of a number
  4. 4. name the property a(b+c)=(a*b)+(a*c)
  5. 7. Multiplicative identity of rational numbers
  6. 9. Numbers starting from 1
  7. 12. name the property (a+b)+c = (a+c)+b
  8. 14. Multiplicative inverse