KS1 · Maths · Year 1
Composition of decade numbers to 100: making groups of 10
Counting in tens - decade numbers
Learn it. Recall it. Make it stick.
IllumED Slides
IllumED · 1/8
Your learning goal
I can recognise and count groups of ten.
1 of 8
Composition of decade numbers to 100: making groups of 10: slides adapted from the imported teaching text; recall questions created from its keywords, learning points and common mistakes. Self-check practice, with no automatic grading or XP. Answers stay on this page and are cleared when you leave.
Original teaching resources
The original illustrated PowerPoint is available as well as the IllumED text slides. It retains the publisher’s design and credits.
Download original PowerPoint ↓What you’ll learn
I can recognise and count groups of ten.
Key learning points
- Objects can be put into groups of 10 to make them easier to count.
- You can recognise a group of 10 because when you separate them, there will be 10 objects.
- If there is not 10 in each group, they are not groups of 10.
- Groups of 10 can be called tens.
Words to know
- Group
- Objects that are gathered together into a set are said to be in a group.
- Separate
- When a group of objects are taken or split apart they have been separated.
Common mistakes
Any group of objects can be counted in tens.
Identify groups that do and do not have 10 objects, drawing attention to the fact that colour, orientation and size are not relevant.
For parents, carers and teachers
- Allow opportunities to construct and deconstruct groups of 10 from objects in the environment in the lesson. Use the slides to simply aid lesson design and delivery. Find opportunities throughout the day to make groups of 10 to count things quickly e.g. when tidying away to check all are there.