• 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

  • Part 1: Making Rectangles
  • Part 2: Making a Class Chart of Rectangles
  • Summarizing the Lesson
  • Homework and Practice
  • Answer Keys

• Lesson 2

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

• Lesson 3

  • Part 1: Finding Factors
  • Part 2: Finding More Factors
  • Part 3: Primes
  • Part 4: Using the Number Line
  • Summarizing the Lesson
  • Homework and Practice
  • Answer Keys

• Lesson 4

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

• Lesson 5

  • Part 1: Exploring Break-Apart Products
  • Part 2: Exploring Larger Break-Apart Products
  • Part 3: Writing Number Sentences for Break-Apart Products
  • Summarizing the Lesson
  • Homework and Practice
  • Answer Keys

• Lesson 6

  • Before the Lesson
  • Part 1: Jacob's Carpet
  • Part 2: Workshop
  • Part 3: Revisit Floor Tiler
  • Summarizing the Lesson
  • Homework and Practice
  • Answer Keys

• Lesson 7

  • Part 1: Grouping Factors
  • Part 2: Multiplying by Multiples of 10
  • Part 3: Exponents
  • Summarizing the Lesson
  • Homework and Practice
  • Answer Keys

• Lesson 8

  • Part 1: Finding Prime Factors
  • Part 2: Number Riddles
  • Summarizing the Lesson
  • Homework and Practice
  • Answer Keys

• Lesson 9

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

• Lesson 10

  • Part 1: Explore Break-Apart Products with Larger Numbers
  • Part 2: Represent Break-Apart Products
  • Part 3: Solve Problems Using Expanded Form
  • Summarizing the Lesson
  • Homework and Practice
  • Answer Keys

Lesson 2

Fact Families

Est. Class Sessions: 2

Daily Practice and Problems

X

Teacher Notes

X

TIMS Challenge

The floor's area is 74 sq. inches. The perimeter is 42 inches. One way to solve this problem is to divide the floor into two rectangles as shown. Students may actually build the floor of the hangar with square-inch tiles.

F. Antopolis Airport

Below is a sketch of the hangar at Antopolis Airport. (Planes are stored and repaired in hangars.)

Find the area and perimeter of the hangar. You may wish to build the hangar with square-inch tiles.