Mental multiplication and division (age 9+)

Multiply and divide numbers mentally drawing upon known facts, including related facts and place-value adjustments

Usually learned at ages 9–10

Builds on: Mental multiplication and division

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On the map from: Marble Skill Taxonomy (v1), © Generative Spark, Inc. (withmarble.com), text CC BY-SA 4.0, database ODbL 1.0: https://github.com/withmarbleapp/os-taxonomy