Addition and subtraction strategies (age 10+)

Add and subtract decimals to hundredths using strategies based on place value, properties of operations, and the relationship between addition and subtraction; relate strategies to written methods and explain reasoning

Usually learned at ages 10–11

Builds on: Reading and writing numbers (age 10+), Place Value × 10 and ÷ 10 (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