Unit 2, Lesson 15
Diferentes tipos de problemas-historia
Grado 1
Preparation
Lesson Purpose
The purpose of this lesson is for students to solve a variety of story problems and discuss the relationship between subtraction and unknown addend problems.
Lesson Narrative
The work of this lesson connects to previous lessons in which students solved Add To, Change Unknown; Put Together/Take Apart story problems with unknowns in different positions; and Compare, Difference Unknown story problems in a way that makes sense to them. In those lessons, students considered addition and subtraction equations that match the same story problem. In this lesson, students solve a variety of story problem types and compare strategies. Students explain how each of these problems can be represented or solved with addition or subtraction and relate subtraction to unknown addend problems.
- Action and Expression
- MLR8
- Represent and solve Put Together/Take Apart and Compare, Difference Unknown problems.
- Resolvamos diferentes tipos de problemas-historia.
Required Materials
Activity 2
Activity 3
Required Preparation
Activity 3
- Gather materials from previous centers:
- Capture Squares, Stage 1
- Shake and Spill, Stages 3 and 4
- What's Behind My Back, Stage 3
Suggested Centers
NoneTeacher Reflection Questions
What part of the lesson went really well today in terms of students learning? What did you do that made that part go well?
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