Lesson 5

Making Ten

Est. Class Sessions: 2–3
X

Mathematical Standards

1.OA.A
Represent and solve problems involving addition and subtraction. (1.OA.A.1)
1.OA.B
Understand and apply properties of operations and the relationship between addition and subtraction. (1.OA.B.3)
1.OA.C
Add and subtract within 20. (1.OA.C.6)

Standards for Mathematical Practice

MP1.
Make sense of problems and
persevere in solving them.
MP2.
Reason quantitatively.
MP3.
Construct viable arguments and critique the reasoning of others.
MP5.
Use appropriate tools strategically.

Students use their prior knowledge of place value of numbers from 10 to 20 and the partitions of ten to develop strategies for adding numbers with sums in the teens. They learn to break apart numbers to make ten.

Content in this Lesson

  • Using mental math strategies and reasoning strategies (e.g., using doubles, using ten, making ten) to solve addition problems with sums between 10 and 20 [E5].
  • Using strategies that apply the properties of addition (e.g., turn-around, compose and decompose numbers) to solve addition problems [E6].
  • Finding a strategy [MPE2].
  • Showing work [MPE5].
X

Materials for Students

Daily Practice and Problems Lesson Homework Assessment

Student Books
Student Activity Book

Teacher Resources

 Teacher Guide - digital

Supplies for Students

20 connecting cubes
desk number line (0–40)

Materials for the Teacher

Display of 100 Chart (Student Activity Book) Reference
Display of Linda's Strategy Master (Teacher Guide)
Display of Seeing Ten (Student Activity Book) Pages 381–382
Display of Eight Ten Frames (Teacher Guide)
Unit 12 Assessment Record
chart paper

Assessment in this Lesson

Assessment Expectation Assessed Math Practices
Expectation Assessed

Two More Problems
with Feedback Box
Student Activity Book
Pages 389–390
E5.
Use mental math strategies and reasoning strategies (e.g., using doubles, using ten, making ten) to solve addition problems with sums between 10 and 20 and the related subtraction problems.
E6.
Use strategies that apply the properties of addition (e.g., turn-around, compose and decompose numbers) to solve addition and subtraction problems.
MPE2.
Find a strategy. I choose good tools and an efficient strategy for solving the problem.
MPE5.
Show my work. I show or tell how I arrived at my answer so someone else can understand my thinking.

Vocabulary in this Lesson