Mathematics 4024 · O Level · Standard form

Standard form — practice question

(a)[1]

Express $1.23 \times 10^{-4}$ in ordinary-number form.

(b)[2]

$(8.2 \times 10^4) + (x \times 10^y) = 9.1 \times 10^5$. Determine the value of $x$ and the value of $y$.

Worked solution & mark scheme

This 3-mark question has a full step-by-step worked solution and mark scheme. One marking point: The ordinary-number form is $0.000123$.

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