# Ratio (age 10+)

Perform mental calculations including with mixed operations and large numbers, using strategies such as partitioning, compensation, and derived facts

Builds on: Mental addition and subtraction (age 9+) (hard, https://ai.page/c/mental-addition-and-subtraction-age-9/en.md), Long multiplication (age 10+) (soft, https://ai.page/c/long-multiplication-age-10/en.md)

Concept id: ratio-age-10. Subject: maths. Licence: CC BY-SA 4.0.

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