• Unit Overview

  • Letter Home
  • Unit Preparation
  • Mathematics in this Unit
  • Assessment in this Unit
  • Key Assessment Opportunities Chart
• Daily Practice and Problems
• Home Practice

• Lesson 1

  • Developing the Lesson
  • Summarizing the Lesson
  • Homework and Practice
  • Answer Keys

• Lesson 2

  • Part 1: Draw the Picture
  • Part 2: Collect the Data
  • Part 3: Graph the Data
  • Part 4: Explore the Data
  • Summarizing the Lesson
  • Homework and Practice
  • Answer Keys

• Lesson 3

  • Part 1: Use Strategies to Solve Problems with Larger Numbers
  • Part 2: Use Strategies to Solve Subtraction Problems with Larger Numbers
  • Summarizing the Lesson
  • Homework and Practice
  • Answer Keys

• Lesson 4

  • Part 1: Introducing Patterns in Numbers
  • Part 2: Adding Dimes
  • Part 3: Addition and Subtraction Patterns on Rule Machines
  • Summarizing the Lesson
  • Homework and Practice
  • Answer Keys

• Lesson 5

  • Part 1: Use Addition Strategies to Solve a Multiplication Problem
  • Part 2: Make Models for Repeated Addition with Math Mice
  • Part 3: Solve Problems with Repeated Addition and Subtraction
  • Summarizing the Lesson
  • Homework and Practice
  • Answer Keys

• Lesson 6

  • Part 1: Developing Strategies for Repeated Subtraction Problems
  • Part 2: Writing Word Problems
  • Part 3: Solving Repeated Addition and Subtraction Problems
  • Summarizing the Lesson
  • Homework and Practice
  • Answer Keys

Lesson 5

Model Repeated Addition and Subtraction

Est. Class Sessions: 2–3

Daily Practice and Problems

X

Teacher Notes

X

Encourage students to solve the problem independently, and then have them share their solution strategies.

8 + 8 + 8 = 24 arms

Possible strategy:

Q. Underwater Mystery

Jerome and Keenya were at the aquarium. They saw three octopi with large heads and eight arms each. How many total arms did they see?

Number sentence: ________________