Unit 3, Lesson 17
Make 10 to Add
Grade 1
Preparation
Lesson Purpose
The purpose of this lesson is for students to look for and use patterns to add within 20. Students see that they can decompose one addend in order to make a ten.
Lesson Narrative
In previous lessons, students recognized the
Student methods are recorded with equations. It may also be helpful to represent how one addend is decomposed in order to make a ten.
- Describe (orally) patterns when adding one-digit numbers to 9.
- Explain (orally) strategies for solving Put Together, Total Unknown problems within 20 that involve making a ten.
- Let’s look for patterns and think about making 10 as we add.
Required Materials
Required Preparation
Activity 1
- Each group of 2 needs a set of Number Cards (1-10). Do not use the 0 cards.
Suggested Centers
NoneTeacher Reflection Questions
What was the best question you asked students today? Why would you consider it the best one based on what students said or did?
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