7th Class Mathematics Rational Numbers Question Bank Rational Numbers

  • question_answer
    What is the value of the expression \[\left[ -\frac{17}{18}\times (-3)\times \frac{108}{30} \right]\]

    A) \[\frac{-108}{10}\]                    

    B) \[\frac{62}{5}\]

    C)  \[\frac{51}{5}\]             

    D) \[\frac{17}{33}\]

    Correct Answer: C

    Solution :

    (c) \[\frac{-17}{18}\times -3\times \frac{108}{\underset{10}{\mathop{\bcancel{30}}}\,}=\frac{-17}{\bcancel{18}}\times (-1)\times \frac{\bcancel{{{108}^{6}}}}{10}\] \[=17\times \frac{\bcancel{{{6}^{3}}}}{\underset{5}{\mathop{\bcancel{10}}}\,}=\frac{51}{5}\]            


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