Two marks exercise problems XV — task. Mathematics State Board, Class 9.

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1. Represent the following information in scientific notation:

(i) The world population is nearly \(7000,000,000\).

i \times i^{i}

(ii) One light year means the distance \(9460528400000000\) \(km\).

i \times i^{i}

(iii) Mass of an electron is \(0.000 000 000 000 000 000 000 000 000 00091093822\) \(kg\).

i \times i^{i}

2. Simplify:

(i) \((2.75 \times 10^7) + (1.23 \times 10^8)\) \(=\)

i \times i^{i}

(ii) \((1.598 \times 10^{17}) - (4.58 \times 10^{15})\) \(=\)

i \times i^{i}

(iii) \((1.02 \times 10^{10}) \times (1.20 \times 10^{-3})\) \(=\)

i \times i^{i}

(iv) \((8.41 \times 10^{4}) \div (4.3 \times 10^{5})\) \(=\)

i \times i^{i}

Did you find an error?

27. Two marks exercise problems XV