Lemmara logoLemmaraWorked solution

4024/11 May/Jun 2022, Question 14: Standard Form

Cambridge O Level Mathematics 4024 · Paper 11 (Non-calculator) · Non-calculator · 4 marks

اقرأ هذا الحل مشروحاً بالعربي ←

The question, in short

Convert a decimal to standard form, then use a table of desert areas in km² to identify the largest desert and find a combined area in standard form.

Summarised in our own words. Use the official paper for the exact wording and any diagrams.

Part (a) · 1 mark

Express 0.000 863 in standard form.

  1. 10.000 863 = 8.63 × 10⁻⁴

Answer8.63 × 10⁻⁴

Part (bi) · 1 mark

From the table of desert areas in km², state which desert has the greatest area.

  1. 11.4 × 10⁷ is the largest
  2. 2Antarctica

AnswerAntarctica

Part (bii) · 2 marks

Add the Arabian and Kalahari areas from the table and give the total in standard form.

  1. 19.0 × 10⁵ = 0.9 × 10⁶
  2. 22.3 × 10⁶ + 0.9 × 10⁶ = 3.2 × 10⁶ km²

Answer3.2 × 10⁶

Stuck on a step? Read the free lesson: Standard Form

Practise more standard form questions

Real 4024 past-paper questions, marked on your working like the exam, with a worked solution for every part.

Practise free on Lemmara

More past-paper questions on standard form

Also searched as: 4024/11/M/J/22 · 4024_s22_qp_11 · 4024 s22 11 · question 14.
Lemmara is an independent study tool, not affiliated with or endorsed by Cambridge International Education. The worked solutions are Lemmara’s own.