Unit 6, Lesson 25
Assess the Reasonableness of Solutions
Grade 4
Preparation
Lesson Purpose
The purpose of this lesson is for students to solve multi-step word problems by analyzing data, estimating, reasoning, and performing multiple operations. It also helps students to build fluency in using the standard algorithm to add and subtract multi-digit numbers up to 1 million. In each activity, students assess the reasonableness of their responses.
Lesson Narrative
In the final lesson of the unit, students apply their knowledge of numbers in base-ten and their estimation and computation skills to solve problems about languages and populations in the United States. The census data used here prompts students to work with large numbers and to interpret them carefully.
- Representation
- MLR8
- Explain (orally and using words or other representations) strategies for solving multi-step problems.
- Explain (orally) a strategy for determining whether an answer is reasonable.
- Let’s solve problems and assess the reasonableness of solutions.
Required Materials
Activity 1
Required Preparation
None
Teacher Reflection Questions
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