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Education Concept Tracker

A prerequisite knowledge graph of 1590 learning concepts across 8subjects. Track what you've mastered and see exactly what you're ready to learn next — the topics whose prerequisites you've already met. Built on the Marble Open Skill Taxonomy.

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Numbers up to 10 into pairs

Mathematics · Addition & Subtraction · conceptual

Decompose numbers up to 10 into pairs in more than one way (part-part-whole)

What mastery looks like

  • 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

Check your understanding

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?