4MA1/1H Jan 2022, Question 8: Standard Form
Pearson Edexcel International GCSE Mathematics A 4MA1 · Paper 1H (Higher) · Calculator · 2 marks
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The question, in short
Multiply a = 4.2 × 10⁻²⁴ by b = 3 × 10¹⁴⁵ and give the result in standard form.
Summarised in our own words. Use the official paper for the exact wording and any diagrams.
Solution · 2 marks
- 14.2 × 10⁻²⁴ × 3 × 10¹⁴⁵
- 24.2 × 3 = 12.6
- 310^(−24+145) = 10¹²¹
- 412.6 × 10¹²¹ = 1.26 × 10¹²²
Answer1.26 × 10¹²²
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