0580/12 May/Jun 2021, Question 21: Standard Form

Cambridge IGCSE Mathematics 0580 · Paper 12 (Core) · Calculator · 2 marks

The question, in short

Convert 0.006 54 into standard form, and for 1.467 × 10¹⁰² written as an ordinary number, state how many zeros come after the 7.

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

Express 0.006 54 in standard form.

Answer6.54 × 10⁻³

Given 1.467 × 10¹⁰² as an ordinary number, find how many zeros follow the digit 7.

11.467 × 10¹⁰² moves the decimal point 102 places right.
2The digits 4, 6, 7 use 3 of these places, leaving 102 − 3 = 99 zeros after the 7

Answer99

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