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7th Class Mathematics Rational Numbers Question Bank Rational Number

  • question_answer
    What should be subtracted from \[\frac{-2}{3}\]to get \[\frac{5}{6}\]?

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

    B)        \[\frac{-3}{2}\]    

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

    D)        \[\frac{-2}{3}\]

    Correct Answer: B

    Solution :

    Let the number to be subtracted be 'x'. Then, \[\frac{-2}{3}-x=\frac{5}{6}\]    \[\Rightarrow \]  \[\frac{-2}{3}=\frac{5}{6}+x\] \[\Rightarrow \]               \[x=\frac{-2}{3}-\frac{5}{6}=\frac{-2}{3}+\frac{-5}{6}\] \[=\frac{(-4)+(-5)}{6}=\frac{-9}{6}=\frac{-3}{2}\] Hence, the required number is \[\frac{-3}{2}\] .


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