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.
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.
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.
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.
Licence
This content is © Oak National Academy Limited (2024), licensed on Open Government Licence version 3.0 except where otherwise stated. See Oak's terms & conditions (Collection 2).
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