Number composition is the children understanding that numbers are made of smaller numbers. In Reception, this means knowing that 5 can be 3 and 2, or 4 and 1, and that the total stays the same even when the parts change.
Strong composition in Reception supports subitising, one more and one less, early addition and subtraction, and number bonds later on. It sits at the heart of secure number understanding.
Direct answer
Teach number composition by building, splitting and recombining small quantities using real objects and structured representations such as five-frames and ten-frames. Keep the focus on language: 6 is made of 4 and 2. The total stays the same.
If you are following a structured progression across the year, you can explore the full EYFS maths scheme here: EYFS maths scheme of work.
Teaching sequence
- Start within 3. Build 3 with objects. Split into 2 and 1. Put back together. Repeat with different arrangements.
- Move to 4 and 5 using five-frames. Show 4 as 3 and 1, then 2 and 2. Ask the children to explain what they see.
- Revisit daily with quick build-and-split routines. Say the number sentence aloud each time.
- Grow the number range to 6, 7 and 8. Use groups the children can see clearly, such as 5 and 1, or 4 and 3.
- Link composition to one more and one less so the children see how numbers change but are still made of parts.
Classroom examples
- In autumn, when focusing on 1, 2 and 3, build each number in different ways using small objects. This links well with EYFS maths autumn week 8: 1, 2, 3.
- In spring, when growing 6, 7 and 8, use visible groups such as 5 and 2, or 4 and 4. Encourage the children to explain how the number is made. This progression is supported in EYFS maths spring week 5: growing 6, 7 and 8.
- Hide part of a number. Show 7 as 5 and 2, cover the 2 and ask: How many are hidden? How do you know?
Common misconceptions
- The children think the number changes when the objects move. Rebuild the same total in different ways and repeat: The total stays the same.
- The children can show one split but struggle to find another. Prompt with: Can you make it a different way?
- The children rely on counting every object each time. Use structured frames to help them see groups instead.
Differentiation
- Support: stay within 5 and use five-frames consistently so patterns become familiar.
- Stretch: explore numbers within 10, including finding a missing part or making the number in three parts.
Assessment and evidence
- Can the children describe a number as parts, for example 8 is 5 and 3?
- Can they find a hidden part when shown one group?
- Do they use composition naturally in play, such as splitting resources or combining groups?
For a broader overview of how composition fits into the full Reception progression within Maths Masters, you can explore the scheme here: Maths Masters.
FAQs
What is number composition in Reception?
Number composition is understanding that numbers are made of smaller numbers and that the total remains the same even when the parts change.
Is composition the same as number bonds?
Composition is broader. It focuses on understanding the parts of a number. Number bonds are specific facts that grow from this understanding.
Should Reception children record composition?
Recording can be light and practical. The priority is talk, building, splitting and explaining using objects.
How far should composition go in Reception?
The focus is secure understanding within 10, including recognising different ways numbers can be made.
