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Mathematics

Test your understanding of this lesson Rational numbers | Multiplication of rational numbers and division of rational numbers:-

1)
The value of \(\frac{4}{7}\times \frac{21}{2}\)
  • \(\frac{82}{14}\)
  • \(\frac{1}{6}\)
  • 6
  • \(\frac{2}{3}\)
2)
The value of \(\frac{-8}{15} \times \frac{-21}{20}\)
  • -\(\frac{14}{25}\)
  • -\(\frac{14}{50}\)
  • \(\frac{14}{50}\)
  • \(\frac{14}{25}\)
3)
The value of \((x+y)\div(x-y)\),when x = \(\frac{2}{5}\) and y = \(\frac{1}{2}\) is
  • 9
  • -9
  • -8
  • \(\frac{1}{10}\)
4)
If x=\((\frac{9}{2}\) x \(\frac{1}{3})+(\frac{8}{3} \div \frac{24}{5})-(\frac{4}{-5} \div \frac{6}{-7})\),then x =
  • \(\frac{521}{45}/)
  • \(\frac{557}{45}/)
  • \(\frac{253}{45}/)
  • \(\frac{353}{45}/)
5)
If \(y=(\frac{-3}{17}\times\frac{7}{15})+\frac{8}{25}\times\frac{15}{34})\),then y=
  • \(\frac{1}{17}\)
  • \(\frac{-1}{17}\)
  • \(\frac{-7}{12}\)
  • \(\frac{7}{12}\)
Hand draw

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