0580/21 May/Jun 2022, Question 13: Standard Form
Cambridge IGCSE Mathematics 0580 · Paper 21 (Extended) · Calculator · 2 marks
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The question, in short
Work out 2 × 10¹⁰⁰ − 2 × 10⁹⁸ and give the result in standard form.
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Solution · 2 marks
- 12 × 10¹⁰⁰ = 200 × 10⁹⁸
- 2200 × 10⁹⁸ − 2 × 10⁹⁸ = 198 × 10⁹⁸
- 3= 1.98 × 10¹⁰⁰
Answer1.98 × 10¹⁰⁰
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