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7th Class Mathematics Integers Question Bank Integers

  • question_answer
    If the expression \[[(-\,43)\times 109]\] can also be written as\[[a\,+\,(-\,387)]\], then what is the value of a?

    A) \[-\,4500\]                     

    B)  \[-\,4300\]

    C) \[-\,\,4587\]                   

    D)  \[-\,\,4200\]

    Correct Answer: B

    Solution :

    (b)\[a+\left( -387 \right)=-43\times 109\] \[\Rightarrow a=-43\times 109+387\] \[=-43\left[ 109-9 \right]=-43\times 100\] \[=-\,4300\]


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