0580/23 May/Jun 2021, Question 20: Standard Form
Cambridge IGCSE Mathematics 0580 · Paper 23 (Extended) · Calculator · 2 marks
اقرأ هذا الحل مشروحاً بالعربي ←
The question, in short
Simplify the sum 2.1 × 10ᵖ + 2.1 × 10ᵖ⁻¹ and express the result in standard form.
Summarised in our own words. Use the official paper for the exact wording and any diagrams.
Solution · 2 marks
- 12.1 × 10ᵖ⁻¹ = 0.21 × 10ᵖ
- 22.1 × 10ᵖ + 0.21 × 10ᵖ = 2.31 × 10ᵖ
Answer2.31 × 10ᵖ
Stuck on a step? Read the free lesson: Standard Form
Practise more standard form 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 standard form
Also searched as: 0580/23/M/J/21 · 0580_s21_qp_23 · 0580 s21 23 · question 20.
Lemmara is an independent study tool, not affiliated with or endorsed by Cambridge International Education. The worked solutions are Lemmara’s own.