Unit 4, Lesson 5
Día 1 de centros
Grado 1
Preparation
Lesson Purpose
The purpose of this lesson is for students to practice adding and subtracting a multiple of 10 from a multiple of 10. Students also practice adding and subtracting within 20.
Lesson Narrative
In Activity 1, students learn Stage 3 of the Check It Off center. In this new stage, called Add or Subtract Tens, students pick two number cards that are multiples of 10 (0–90) and choose whether to make an addition or subtraction expression. In Activity 2, students choose from previously introduced centers that also focus on adding and subtracting.
- Action and Expression
- MLR8
- Explain (orally) strategies for adding and subtracting multiples of 10.
- Sumemos y restemos.
Required Materials
Activity 2
Required Preparation
Activity 1
- Create a set of cards from the blackline master for each group of 2.
Activity 2
- Gather materials from previous centers:
- Five in a Row, Stages 1–4
- How Close, Stages 1 and 2
- Number Puzzles, Stages 1 and 2
Suggested Centers
NoneTeacher Reflection Questions
What do your students think it means to be good at math? How are you helping them change negative impressions they might have about their ability to reason mathematically?
Have a correction or suggestion?
Tell us about a typo, a broken link, or an improvement you’d like to see. We read every submission but can’t reply.
Have a question or need support instead? Visit our Contact Us page to reach our team.