Estimation and Efficient Computation159

• LESSON 1

• Workshop: Addition and Subtraction Strategies160

  Digits Game

  Planet Problems

• LESSON 2

• Multiplication Strategies166

  Rectangle Model and Expanded Form

  All-Partials Method

  Homework

• LESSON 3

• Explore Multiplication by Multidigit Numbers172

  Setting Up For the Play

  Using Expanded Form

  Homework

• LESSON 4

• Paper-and-Pencil Multiplication177

  Multiplication Digits Game

  All-Partials Multiplication

  Compact Method for Multiplication

  Tanya's Compact Method

  Homework

• LESSON 5

• Area Problems186

  Homework

• LESSON 6

• Problem Solving with Area189

• LESSON 7

• Problem Solving with Volume195

  Volume of Boxes

  Homework

• LESSON 8

• Workshop: Multiplication Strategies200

  Multiplication Digits Game

  Use Strategies to Solve Problems

  Use Strategies to Find Volume