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Foundations of Problem Solving · Weeks 19-27

Checking for Reasonableness

Using estimation and inverse operations to check the reasonableness of solutions to word problems.

Key Questions

  1. Explain how estimation can help predict a reasonable range for an answer.
  2. Analyze how inverse operations can be used to verify the accuracy of a calculation.
  3. Critique a given solution, identifying potential errors based on reasonableness.

Common Core State Standards

CCSS.Math.Content.3.OA.D.8
Grade: 3rd Grade
Subject: Mathematics
Unit: Foundations of Problem Solving
Period: Weeks 19-27

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