Divide decimal fractions by 1-digit numbers
I can use multiplying by 10 or 100 to divide decimal fractions by 1-digit numbers mentally.
Divide decimal fractions by 1-digit numbers
I can use multiplying by 10 or 100 to divide decimal fractions by 1-digit numbers mentally.
These resources will be removed by end of Summer Term 2025.
Lesson details
Key learning points
- When we divide decimal fractions by 1-digit numbers, make the decimal into a whole number by multiplying by 10 or 100
- Then use unitising and known facts to divide.
- The answer can then be adjusted by division.
Keywords
Unitising - Treating groups that contain the same number of things as ‘ones’ or ‘units’. It is important particularly in handling money and in understanding place value and supports us to think multiplicatively.
Integer - An integer is a whole number with no fractional part e.g. 0, 1, 14, 103 Decimal numbers such as 3.4 are not integers.
Common misconception
Children may scale the decimal fraction inaccurately or may forget to scale the answer accordingly to solve the original equation.
If a decimal fraction has only tenths, we multiply by 10 to form a whole number. If the decimal fraction has hundredths, we multiply by 100 to form a whole number. Remember to adjust the answer to solve the original equation.
To help you plan your year 5 maths lesson on: Divide decimal fractions by 1-digit numbers, download all teaching resources for free and adapt to suit your pupils' needs...
To help you plan your year 5 maths lesson on: Divide decimal fractions by 1-digit numbers, download all teaching resources for free and adapt to suit your pupils' needs.
The starter quiz will activate and check your pupils' prior knowledge, with versions available both with and without answers in PDF format.
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The assessment exit quiz will test your pupils' understanding of the key learning points.
Our video is a tool for planning, showing how other teachers might teach the lesson, offering helpful tips, modelled explanations and inspiration for your own delivery in the classroom. Plus, you can set it as homework or revision for pupils and keep their learning on track by sharing an online pupil version of this lesson.
Explore more key stage 2 maths lessons from the Calculating with decimal fractions unit, dive into the full secondary maths curriculum, or learn more about lesson planning.
Licence
Lesson video
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Starter quiz
6 Questions
3
5
1
15
30
50
85 ÷ 10
85 ÷ 100
85 ÷ 1
8.5 ÷ 10
8.5 ÷ 100
0.24
0.49
2
2.8
0.27
Exit quiz
6 Questions
0.5
0.6
0.7
0.3
0.08
0.18
0.07
0.12