Use knowledge of column addition and subtraction to calculate with decimal numbers
I can use knowledge of column addition and subtraction to calculate with decimal numbers.
Use knowledge of column addition and subtraction to calculate with decimal numbers
I can use knowledge of column addition and subtraction to calculate with decimal numbers.
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Lesson details
Key learning points
- Numbers are recorded in columns with the same value digits in each column.
- Start with the smallest value column in case numbers need to be regrouped or exchanged.
- If the value of a digit in the minuend is greater than the same digit in the subtrahend, you will need to exchange.
- Make sure that any regrouped numbers are added in with others of the same value.
Keywords
Decimal number - A decimal number has a decimal point followed by digits that show the fractional part.
Regrouping - The process of unitising and exchanging between place values is known as regrouping. For example: ten ones can be regrouped for one ten.
Place value - The value of a digit in a number based on where it is placed.
Common misconception
Pupils regroup incorrectly, particularly when subtracting e.g. exchanging one ten for ten ones.
Build the calculation using place value counters on a grid set out like a column method. Ask pupils to represent regrouping with counters.
To help you plan your year 5 maths lesson on: Use knowledge of column addition and subtraction to calculate with decimal numbers, download all teaching resources for free and adapt to suit your pupils' needs...
To help you plan your year 5 maths lesson on: Use knowledge of column addition and subtraction to calculate with decimal 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 Compose and calculate with decimals including column addition and subtraction 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
Exit quiz
6 Questions
