Lesson 19
Problemas-historia y ecuaciones
Lesson Purpose
The purpose of this lesson is for students to write two different equations to match a story problem.
Lesson Narrative
Students are encouraged to write an equation with a symbol for the answer to the question, but they are not required to. Students may write a second equation using the relationship between addition and subtraction, the commutative property, or the meaning of the equal sign.
- Engagement
- MLR6
Activity 1: Lotería
Learning Goals
Teacher Facing
- Solve a variety of story problem types.
- Write two different equations to match a story problem.
Student Facing
- Escribamos 2 ecuaciones que correspondan a cada problema-historia.
Required Materials
Materials to Gather
Required Preparation
Lesson Timeline
| Warm-up | 10 min |
| Activity 1 | 20 min |
| Activity 2 | 15 min |
| Lesson Synthesis | 10 min |
| Cool-down | 5 min |
Teacher Reflection Questions
How do you see your students demonstrating an understanding of the relationship between addition and subtraction? Are students working flexibly with addition and subtraction in order to find missing values?