Unit 3, Lesson 10
Suma y resta con una decena
Grado 1
Preparation
Lesson Narrative
In the previous lesson, students found the value that made addition equations true when one addend was 10. In this lesson, students find the unknown value in story problems and addition and subtraction equations. They may find the unknown value in any way that makes sense to them. In the Syntheses, students discuss how the relationship between addition and subtraction is helpful when finding unknown values.
- Action and Expression
- MLR6
- Interpret (orally) and use strategies for finding the number that makes a subtraction equation true based on the relationship between addition and subtraction.
- Represent and solve Add To, Start Unknown and Add To, Change Unknown problems where the total is a teen number.
- Sumemos y restemos con números del 11 al 19.
Required Materials
Required Preparation
None
Suggested Centers
NoneTeacher Reflection Questions
How did the student work you selected impact the direction of the discussion? What student work might you pick next time if you taught the lesson again?