10 questions🇬🇧English
🔬 Standard Form – Year 9
Maths · Year 9 (KS3) — writing, ordering and calculating with very large and very small numbers
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Questions
Write 45 000 in standard form:
4.5 × 10⁵
4.5 × 10³
45 × 10⁴
4.5 × 10⁴
20s
Write 3.2 × 10⁵ as an ordinary number:
3 200 000
32 000
3 200
320 000
20s
Which of these numbers is written correctly in standard form?
6.02 × 10²³
10 × 10²²
0.602 × 10²⁴
60.2 × 10²²
20s
A human hair is about 0.00008 m thick. Write this in standard form:
8 × 10⁻⁴ m
8 × 10⁻⁵ m
8 × 10⁵ m
8 × 10⁻⁶ m
30s
Which of these numbers is the largest?
9.8 × 10⁴
2.1 × 10⁵
1.2 × 10⁵
5.3 × 10⁴
30s
Which of these numbers is the smallest?
1 × 10⁻³
3 × 10⁻⁴
8 × 10⁻⁵
5 × 10⁻⁴
30s
Work out (3 × 10⁴) × (2 × 10⁵) in standard form:
6 × 10⁹
6 × 10²⁰
6 × 10¹
5 × 10⁹
30s
Work out (8 × 10⁶) ÷ (2 × 10²) in standard form:
4 × 10⁸
4 × 10¹²
4 × 10⁴
4 × 10³
30s
Work out (5 × 10³) × (4 × 10⁶) and give your answer in standard form:
9 × 10⁹
2 × 10¹⁰
2 × 10⁹
2 × 10¹⁸
60s
The Sun is about 1.5 × 10⁸ km from Earth. Light travels about 3 × 10⁵ km per second. How long does sunlight take to reach us?
About 5000 seconds
About 0.5 seconds
About 500 seconds
About 50 seconds
60s