Edexcel IGCSE Math A Higher 1.9 A Standard Form Questions

Practise standard-form questions by converting ordinary numbers and performing arithmetic before correcting the coefficient.

Exam points

Convert between ordinary numbers and a × 10^n for positive and negative powers.
Add, multiply or divide standard-form values before correcting the final coefficient.
Keep the final answer in standard form with coefficient 1 ≤ a < 10 after simplifying.

[Maximum number: 4]

(a)

Write $6.04 \times 10^{5}$ as an ordinary number.

[ 1 ]

(b)

Write 0.00007 in standard form.

[ 1 ]

Final answer:
$7\times10^{-5}$

(c)

Work out $\frac{7.6 \times 10^{10}}{4 \times 10^{5}-2 \times 10^{4}}$

Give your answer in standard form.

[ 2 ]

Working values accepted for method:
$380000,\qquad 3.8\times10^{5},\qquad 38\times10^{4}$

Final answer:
$2\times10^{5}$

Accept $2.0\times10^{5}$ , $2.00\times10^{5}$ , etc.
SC B1 for 200000, $20\times10^{4}$ , $0.2\times10^{6}$ , or $2\times10^{n}$ where $n\ne5$ , when given as a final answer.

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Edexcel IGCSE Math A Higher 1.9 A Standard Form Questions question 1

Question (a)

Question (b)

Question (c)