7th Class Mathematics Algebraic Expressions Question Bank Algebra

  • question_answer
    DIRECTIONS: Passage ? 1 Read the passage(s) given below and answer the questions that follow. Let K represents any terminating decimal or a number from 1 to 9.999 _ _ _ (or\[1\le K<10\]). Then we can express very large and very small numbers in special form such as \[K\times {{10}^{n}},\] where n is any integer. This form of writing numbers is known as scientific notation. This form of numbers is also called the standard form. Usual form of \[1.05\times {{10}^{3}}\]is

    A) 105                

    B) 1050

    C) 10500                         

    D) 105000

    Correct Answer: B

    Solution :

     \[1.05\times {{10}^{3}}=\frac{105}{100}\times {{10}^{3}}\]       \[=105\times {{10}^{-2+3}}=105\times 10=1050\]


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