Justifying mathematical reasoning

Construct and follow multi-step mathematical arguments; identify errors in reasoning and explain why a method works or does not work

Usually learned at ages 7–8

Builds on: Describing Aloud (helps), Teaching It Back (helps), Explaining Mathematical Reasoning, Adding and subtracting (age 7+) (helps), Addition and subtraction strategies (age 7+) (helps)

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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