0580/12 May/Jun 2022, Question 18: Estimation
Cambridge IGCSE Mathematics 0580 · Paper 12 (Core) · Calculator · 2 marks
اقرأ هذا الحل مشروحاً بالعربي ←
The question, in short
Round 27, 2.3, 845.4 and 0.048 each to 1 significant figure, then use these to estimate the value of (27 − 2.3²) ÷ (845.4 × 0.048).
Summarised in our own words. Use the official paper for the exact wording and any diagrams.
Solution · 2 marks
- 1Round to 1 s.f.: (30 − 2²)/(800 × 0.05)
- 2= (30 − 4)/40 = 26/40
- 3= 0.65
Answer0.65
Stuck on a step? Read the free lesson: Estimation
Practise more estimation questions
Real 0580 past-paper questions, marked on your working like the exam, with a worked solution for every part.
Practise free on LemmaraMore past-paper questions on estimation
Also searched as: 0580/12/M/J/22 · 0580_s22_qp_12 · 0580 s22 12 · question 18.
Lemmara is an independent study tool, not affiliated with or endorsed by Cambridge International Education. The worked solutions are Lemmara’s own.