Year 11
Foundation

Convert large standard form numbers to ordinary form

Year 11
Foundation

Convert large standard form numbers to ordinary form

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Lesson details

Key learning points

  1. In this lesson, we will convert standard form numbers with positive powers of ten into ordinary numbers

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3 Questions

Q1.
Work out the missing index number for the calculation 2.650 x 10ⁿ = 2,650
Correct answer: 3
4
5
6
Q2.
Write one million in standard form.
1 x 10⁴
1 x 10⁵
Correct answer: 1 x 10⁶
1 x 10⁹
Q3.
Write 280,000 in standard form.
0.28 x 10⁶
2.8 x 10⁴
Correct answer: 2.8 x 10⁵
280 x 10³

3 Questions

Q1.
Why is 78.12 x 10⁵ not a standard form number?
The first part of the standard form number has too many digits.
Correct answer: The first part of the standard form number must be less than ten.
The index number is incorrect.
Q2.
Write 5.81 x 10⁶ in ordinary form.
0.00000581
Correct answer: 5,810,000
58,106
581,000
Q3.
Which number is smaller? 3 x 10⁴ or 4 x 10³
3 x 10⁴
Correct answer: 4 x 10³