5th Class Mathematics Decimals Question Bank Decimals

  • question_answer Study the equation given. Find the value of \[R\] rounded off to one decimal place.

    A) \[7.8\]                           

    B)          \[7.75\]             

    C)          \[7.7\]                           

    D)          \[8\]

    Correct Answer: A

    Solution :

    \[7.8+2.4\div 60-0.09=R\]             \[7.8+\left( \frac{2.4}{60} \right)-0.09=R\]             \[7.8+\left( \frac{24}{600} \right)-0.09=R\]             \[7.8+0.04-0.09=R\]             \[7.84-0.09=R\] \[\therefore \]      \[R=7.75\] Rounding off \[R\] to \[1\] decimal place, we get\[7.8\].

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