CBSE  /  Class 8  /  Maths  /  Rational Numbers

  • 1. 
    Which of the following statements is true?

  • Natural numbers are not associative for multiplication
  • Whole numbers are not associative for multiplication
  • Integers are associative for multiplication
  • Rational numbers are not associative for multiplication.

  • 2. 
    Which of the following statements is true?

  • Natural numbers are associative for division
  • Whole numbers are associative for division
  • Integers are associative for division
  • Rational numbers are not associative for division.

  • 3. 
    0 is not

  • a natural number
  • a whole number
  • an integer
  • a rational number.

  • 4. 
    \(\frac{1}{2}\) is 2

  • a natural number
  • a whole number
  • an integer
  • a rational number.

  • 5. 
    a + b = b + a is called

  • commutative law of addition
  • associative law of addition
  • distributive law of addition
  • none of these.

  • 6. 
    a × b = b × a is called

  • commutative law for addition
  • commutative law for multiplication
  • associative law for addition
  • associative law for multiplication.

  • 7. 
    (a + b) + c = a + (b + c) is called

  • commutative law for multiplication
  • commutative law for addition
  • associative law for addition
  • associative law for multiplication.

  • 8. 
    a × (b × c) = (a × b) × c is called

  • associative law for addition
  • associative law for multiplication
  • commutative law for addition
  • commutative law for multiplication.

  • 9. 
    a(b + c) = ab + ac is called

  • commutative law
  • associative law
  • distributive law
  • none of these.

  • 10. 
    The additive identity for rational numbers is

  • 1
  • -1
  • 0
  • none of these.
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