Estimation to check answers to calculations

Use estimation to check answers to calculations and determine, in the context of a problem, an appropriate degree of accuracy

Usually learned at ages 10–11

Builds on: Decimal place value (helps), Checking Answers by Rounding

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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