Count groups of 10 in decade numbers
I can recognise when to count in tens and use my decade numbers to find out how many there are altogether.
Count groups of 10 in decade numbers
I can recognise when to count in tens and use my decade numbers to find out how many there are altogether.
These resources will be removed by end of Summer Term 2025.
Lesson details
Key learning points
- You can count groups of 10 in two ways.
- You can count groups of 10 using decade numbers.
- You can look at the digit before zero to find out how many tens are in a decade number.
Keywords
Group - Objects that are gathered together in a set can be said to be in a group.
Decade numbers - These are the multiples of ten which mark the tens boundary where the pattern of counting changes.
Represent - The word represent tells you what something is worth or what it means or tells you.
Common misconception
When objects are in 10s, children may count the number of tens rather than the amount altogether.
Introduce errors involving confusion between the number of tens and the amount altogether for children to reason about.
To help you plan your year 1 maths lesson on: Count groups of 10 in decade numbers, download all teaching resources for free and adapt to suit your pupils' needs...
To help you plan your year 1 maths lesson on: Count groups of 10 in decade 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.
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Explore more key stage 1 maths lessons from the Counting in tens - decade numbers 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
4 groups of 10
3 groups of 10
10 groups of 10
7 groups of 10
Exit quiz
6 Questions
7 tens
5 tens
3 tens
1 ten