Adding and subtracting (age 9+)

Solve addition and subtraction multi-step problems in contexts, deciding which operations and methods to use and why

Usually learned at ages 9–10

Builds on: Two-step addition and subtraction problems, Mental addition and subtraction (age 9+) (helps), Fluent addition and subtraction (age 9+)

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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