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Mathematics

Eight Standard

Test your understanding of this lesson Operations on algebraic expressions | Multiplication and division operation:-

1)
The product of \(13x^2y\) and -\(3xyz^2\) is
  • \(39xy^2z^2\)
  • \(39x^3y^2z^2\)
  • -\(39x^3yz^2\)
  • -\(39x^3y^2z^2\)
2)
the product of \(\frac{2}{3}\), \(\frac{3}{4}xz\) and \(\frac{1}{2}yz\) is
  • \(\frac{1}{2}xyz\)
  • \(\frac{1}{3}x^2y^2z^2\)
  • \(\frac{1}{4}x^2y^2z^2\)
  • \(\frac{1}{4}x^3y^3z^3\)
3)
The product of -\(\frac{7}{5}x^2y,\frac{15}{2}xy^2\) and \(\frac{-6}{5}x^3y^3\) is
  • -\(21x^6y^6\)
  • \(21 x^6 y^6\)
  • \(\frac{105}{5}x^6y^5\)
  • -\(\frac{21}{5}x^6 y^5\)
4)
\((\frac{2}{5}a^2b) \times(-15 b^2ac)\times (\frac{1}{2}abc^3)=\)
  • \(2a^4b^3c^4\)
  • \(3a^3b^3c^3\)
  • \(3a^4b^4c^4\)
  • -\(3a^4b^4 c^4\)
5)
\((\frac{4}{9}pqr^3) (\frac{-27}{5}p^3q^2) (-8q^3p)=\)
  • -\(96 p^3q^6r^3\)
  • \(96p^4q^6r^3\)
  • \(96p^5q^6r^3\)
  • -\(96p^6q^6r^3\)
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