Lesson 7

Practice Strategies for Larger Numbers

Est. Class Sessions: 2–3
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Mathematical Standards

1.OA.A
Represent and solve problems involving addition and subtraction. (1.OA.A.1, 1.OA.A.2)
1.OA.B
Understand and apply properties of operations and the relationship between addition and subtraction. (1.OA.B.3, 1.OA.B.4)
1.OA.C
Add and subtract within 20. (1.OA.C.6)
1.OA.D
Work with addition and subtraction equations. (1.OA.D.8)

Standards for Mathematical Practice

MP1.
Make sense of problems and persevere in solving them.
MP2.
Reason quantitatively.
MP5.
Use appropriate tools strategically.
MP6.
Attend to precision.
MP7.
Look for and make use of structure.

Students revisit the Invented Strategies chart and discuss which strategies seem better suited to solve each fact. They summarize those strategies into an Addition Strategies Menu for Larger Numbers. Students then choose a practice that will help them develop reasoning-from-known-facts strategies to solve addition facts.

Content in this Lesson

  • Solving word problems involving two whole numbers whose sum is between 10 and 20 [E3].
  • Representing reasoning to addition problems [MPE5].
  • Using doubles to solve addition problems [E5].
  • Making ten to solve addition problems [E5].
  • Choosing appropriate and efficient strategies to solve addition facts [MPE2].
  • Using strategies that apply the properties of addition to solve addition problems [E6].
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Materials for Students

Daily Practice and Problems Lesson Homework Assessment

Student Book
Student Activity Book

Teacher Resources

 Teacher Guide - digital

Supplies for Students

20 connecting cubes

Materials for the Teacher

1 prepared set of Addition Cards for Larger Sums 1 and 2 from Lesson 1 (Teacher Guide)
   See Materials Preparation.
Invented Strategies chart from Lesson 1
Display of Addition Strategies Menu for Small Numbers (Student Activity Book) Reference
Display of Addition Strategies Menu for Larger Numbers (Student Activity Book) Reference
sets of Ten Frame Cards 1–9 Master (Teacher Guide), 3 copies per set. See Materials Preparation.
copies of Near Doubles Match Board Master (Teacher Guide). See Materials Preparation.
prepared sets of the Near Doubles Cards Master (Teacher Guide). See Materials Preparation.
a few copies of Doubles, Doubles +1, Doubles −1 Spinners section from Lesson 4 (Student Activity Book) Page 376
several copies of Doubles, Doubles +1, Doubles −1 Recording Sheet section from Lesson 4 (Student Activity Book)
    Page 377
Unit 12 Assessment Record
connecting cubes
clear plaster spinners or paper clips and pencils. See Materials Preparation.
chart paper
tape or glue

Materials Preparation

Prepare the Addition Cards for Larger Sums. Copy one set of the Addition Cards for Larger Sums 1–2 Masters on brightly colored card stock or paper. Cut apart the cards.
Prepare Materials for Learning Centers. Students will rotate through four activities in this lesson. Make a sign to identify each center activity. Decide how many students will visit a center at one time. Prepare the following materials for each activity accordingly and place them in a learning center:
  • Addition Problems: connecting cubes
  • Move It to Make Ten: Copy and cut apart 3 copies of the Ten Frame Cards 1–9 Master for each pair of students. Place each set of cards in an envelope.
  • Near Doubles Match: Copy 1 Near Doubles Match Board Master and copy and cut apart 1 copy of the Near Doubles Cards Master for each pair of students. Place the cards in an envelope.
  • Doubles, Doubles +1, Doubles −1: Make a few copies of the Doubles, Doubles +1, Doubles −1 Spinners and make several copies of the recording sheet from the Student Activity Book in Lesson 4. Provide a clear plastic spinner or a paper clip and a pencil.

Assessment in this Lesson

Assessment Expectation Assessed

Addition Practice Menu
Self-Check
Student Activity Book
Page 401
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.

More Nan and Bert Problems
Check-In: Questions 1–3
with Feedback Box
Student Activity Book
Pages 403–405
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.