Unit 4, Lesson 12
Compare Addition and Subtraction Story Problems
Kindergarten
Preparation
Lesson Narrative
In previous lessons, students solved Add To and Take From, Result Unknown story problems. The purpose of this lesson is to solve Add To, Result Unknown and Take From, Result Unknown story problems with the same context, which gives students an opportunity to focus on the action in each story and how it determines whether they need to add or subtract to solve the problem (MP2).
- Representation
- MLR8
- Comprehend the notation “A + B” can be used to represent an Add To problem and is read as “A plus B.”
- Comprehend the notation “A – B” can be used to represent a Take From problem and is read as “A minus B.”
- Represent and solve an Add To, Result Unknown problem.
Required Materials
Activity 1
Activity 2
Activity 3
Required Preparation
- Gather materials from previous centers:
- Bingo, Stages 1-3
- Math Fingers, Stages 1-3
- Math Stories, Stages 1 and 2
- Subtraction Towers, Stage 1
- 5-Frames, Stages 1 and 2
- Counting Collections, Stage 1
Suggested Centers
NoneTeacher Reflection Questions
Think about a time you recently made a mistake during math class. How did you leverage your mistake to show students that mistakes are just learning in progress?