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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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Decimal place value

Mathematics · Measurement · procedural

Convert among different-sized standard measurement units within a given system (e.g. 5 cm to 0.05 m) using decimal notation to up to three decimal places; convert between smaller and larger units of length, mass, volume, and time

What mastery looks like

  • Convert 3,250 g to 3.25 kg using decimal notation
  • Convert 0.45 km to 450 m
  • Explain the relationship between mm, cm, m, and km using powers of 10

Check your understanding

If Decimal place value needs to convert 5 cm to metres and write the answer as a decimal, can they do it — and also convert 2.45 kg into grams?