Unit 8, Lesson 3
Count to Add and Subtract
Kindergarten
Preparation
Lesson Purpose
The purpose of this lesson is for students to use their knowledge of the count sequence to solve story problems about adding or subtracting 1.
Lesson Narrative
In previous units, students used objects and drawings to represent and solve Add To, Result Unknown and Take From, Result Unknown story problems. In this lesson, all of the story problems involve adding or subtracting 1, which encourages students to use their knowledge of the count sequence to solve the story problems (MP7, MP8). Students may still choose to use objects or drawings to represent and solve story problems, which is fine. In grade 1, students will build on this work as they relate counting to addition and subtraction.
If students need additional support with the concepts in this lesson, refer back to Unit 2, Section D and Unit 4, Section B in the curriculum materials.
- Action and Expression
- MLR8
- Explain (orally) strategies for solving story problems about adding or taking away 1 within 10, including strategies based on the count sequence.
- Let’s do story problems.
Required Materials
Activity 1
Activity 2
Activity 3
Required Preparation
Activity 3
- Gather materials from:
- Fewer, Same, More
- Math Fingers
- Tower Build
- Math Stories
- Which One?
Suggested Centers
NoneTeacher Reflection Questions
In the next lesson, students will determine 1 more and 1 less than a given number with no story problem context. How does the work of this lesson prepare students for that work?
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