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8th Class Mathematics Rational Numbers Question Bank Rational Numbers

  • question_answer
    What is the simplified form of \[\left( \frac{-9}{7}\times \frac{-1}{3} \right)+\left( \frac{15}{8}\times \frac{4}{5} \right)-\left( \frac{27}{14}\times \frac{2}{9} \right)\]?                

    A)          \[\frac{3}{2}\]                                  

    B)                         \[\frac{-3}{7}\]                

    C)                                         \[\frac{-3}{2}\]                                

    D)                         \[\frac{3}{7}\]

    Correct Answer: C

    Solution :

    \[\left( \frac{-9}{7}\times \frac{-1}{3} \right)+\left( \frac{15}{8}\times \frac{-4}{5} \right)-\left( \frac{27}{14}\times \frac{2}{9} \right)\] \[=\frac{3}{7}-\frac{3}{2}-\frac{3}{7}=\frac{-3}{2}\]


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