Mathematics·Addition & Subtraction·conceptual
Numbers up to 10 into pairs
Decompose numbers up to 10 into pairs in more than one way (part-part-whole)
Suggested ages 4–6
Evidence of understanding
- Show that 5 = 1 + 4, 5 = 2 + 3, 5 = 0 + 5 etc.
- Use objects or drawings to find all pairs that make a given number
- Record decompositions as equations
Assessment prompt
If Numbers up to 10 into pairs has 8 grapes, can they split them into two groups in different ways — like 3 and 5, or 4 and 4 — and explain that both groups together still make 8?
Standards alignment
K.OA.3US · ccss-math
Decompose Numbers Less Than or Equal to 10
Common Core State Standards for Mathematics · K
Maths/Y1/AS/2GB · uk-nc-2013
Number bonds and subtraction facts within 20
The national curriculum in England: Key stages 1 and 2 framework document · Key Stage 1