Unit 5, Lesson 3
Sumemos, expliquemos
Grado 1
Preparation
Lesson Narrative
In previous lessons, students used methods based on place value to add within 100, without composing a ten. They analyzed equations that represent methods for finding the sum.
In this lesson, students add two-digit numbers using methods of their choice and write equations to match their thinking. Students interpret and compare different methods for finding the value of the same sums. Students also practice explaining their own methods and listening to the methods of their peers. Students have opportunities to revise how they explain their own and others' methods and consider how representations of their own thinking (for example, drawings or equations) can help them explain or interpret their work (MP3, MP6).
This lesson has a Student Section Summary.
- Action and Expression
- MLR7
- Interpret (using words or other representations) equations that represent steps for adding based on place value.
- Represent strategies for adding 2 two-digit numbers with equations and explain (orally and using words or other representations) the strategies.
- Sumemos números y escribamos ecuaciones para mostrar nuestro trabajo.
Required Materials
Required Preparation
None
Suggested Centers
NoneTeacher Reflection Questions
Today students were asked to share their thinking in a way that would make sense to their partner. What have you noticed about the language students use? What support can you offer to students who struggle to communicate their ideas orally?