Unit 5, Lesson 11
How Did You Do That?
Grade 1
Preparation
Lesson Purpose
The purpose of this lesson is for students to add 2 two-digit numbers, with composing a ten, using methods based on place value and properties of operation and make sense of equations that represent addition methods.
Lesson Narrative
In previous lessons, students added 2 two-digit numbers using methods based on place value and properties of operations. In this lesson, students add 2 two-digit numbers and make sense of the equations that represent addition methods.
The Cool-Down should be completed before the Lesson Synthesis.
- Engagement
- MLR7
- Interpret (orally) base-ten diagrams and equations that represent strategies for adding 2 two-digit numbers by place.
- Present (using words and other representations) strategies for adding 2 two-digit numbers.
- Let’s add 2-digit numbers and make sense of equations.
Required Materials
Required Preparation
None
Suggested Centers
NoneTeacher Reflection Questions
How did your students represent their thinking today? How might you support them in creating more efficient representations?
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