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8th Class Mathematics Rational Numbers Question Bank Rational Numbers

  • question_answer
    Simplify: \[\frac{3}{8}+\frac{7}{2}+\left( \frac{-3}{5} \right)+\frac{9}{8}+\left( \frac{-3}{2} \right)+\frac{6}{5}\].

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

    B)  \[\frac{-41}{10}\]     

    C)         \[\frac{39}{5}\]                     

    D)         \[\frac{41}{10}\]       

    Correct Answer: D

    Solution :

    \[\frac{3}{8}+\frac{7}{2}+\left( \frac{-3}{5} \right)+\frac{9}{8}+\left( \frac{-3}{2} \right)+\frac{6}{5}\] \[=\frac{3}{8}+\frac{7}{2}-\frac{3}{5}+\frac{9}{8}-\frac{3}{2}+\frac{6}{5}\] \[=\frac{15+140-24+45-60+48}{40}=\frac{164}{40}=\frac{41}{10}\]


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