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7th Class Mathematics Integers Question Bank Number System

  • question_answer
    Find the sum \[\left( \frac{4}{5}+\frac{25}{15}-10 \right)+\frac{21}{45}\]

    A)  \[-\frac{1}{9}\]                        

    B)  \[1\frac{1}{9}\]             

    C)  \[-7\frac{1}{15}\] 

    D)  \[4\frac{22}{27}\]

    Correct Answer: C

    Solution :

    (c): \[\frac{4}{5}+\frac{25}{15}-10+\frac{21}{45}\] \[=\frac{36+75-450+21}{45}\] \[=\frac{-318}{45}=\frac{-106}{15}=-7\frac{1}{15}.\]               


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