Pearson Edexcel IGCSE · Mathematics (Specification A)

Standard form: Practice Questions

5 multiple-choice questions marked as you go, and 5 written questions with worked solutions. All on Standard form.

10 questions19 marksFree, no account

Question 1

1 mark

Write the number \(650,000,000\) in standard form.

Question 2

1 mark

Calculate the value of \((1.2 \times 10^5) + (3.4 \times 10^4)\).
Give your answer in standard form.

Question 3

1 mark

Express the number \(0.000082\) in standard form.

Question 4

1 mark

Work out \(\frac{4.5 \times 10^7}{5 \times 10^{-2}}\).
Give your answer in standard form.

Question 5

1 mark

A rectangular field has a length of \( 6.4 \times 10^2 \) metres and a width of \( 5 \times 10^1 \) metres.

Calculate the area of the field.
Give your answer in standard form.

Question 6

2 marks

Express the number \(0.0000037\) in standard form.

Write your answer out first, then check it against the worked solution.

Question 7

3 marks

A beam of light travels at a speed of \(3 \times 10^5\) km/s. Calculate the time, in seconds, it takes for the light to travel a distance of \(4.5 \times 10^7\) km. Give your answer in standard form.

Write your answer out first, then check it against the worked solution.

Question 8

2 marks

Write the number \(5.4 \times 10^4\) as an ordinary number.

Write your answer out first, then check it against the worked solution.

Question 9

3 marks

A spaceship travels at a constant speed of \(2.4 \times 10^4\) kilometres per hour.

(a) Calculate the distance the spaceship travels in 15 hours. Give your answer in standard form.

(b) The distance from Earth to a satellite is \(3.6 \times 10^5\) km. Calculate the time it takes for the spaceship to reach the satellite. Give your answer in hours.

Write your answer out first, then check it against the worked solution.

Question 10

4 marks

The mass of Planet X is \(6 \times 10^{24} \text{ kg}\). The mass of Planet Y is \(1.5 \times 10^{27} \text{ kg}\).

(a) Calculate how many times heavier Planet Y is than Planet X. Give your answer in standard form.

(b) Find the total mass of Planet X and Planet Y. Give your answer in standard form.

Write your answer out first, then check it against the worked solution.

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