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Selected topic Numbers up to 10 into pairs Mathematics · Addition & Subtraction · view full details
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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

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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