Workshop: Multiplication with Larger Numbers

Prepare for the Workshop. Review student work and progress from previous lessons to guide instructional decisions about the following Expectations:

E3.

Demonstrate understanding of the place value concepts and mathematical properties involved in operations with multidigit numbers (e.g., use the distributive property to multiply).

E4.

Show connections between models and strategies for multiplication (e.g., demonstrate partial products using a rectangle model for multiplication).

E6.

Estimate products.

E7.

Multiply multidigit numbers by 1-digit numbers using mental math strategies and paper-and-pencil methods (e.g., expanded form, all-partials, compact).

E8.

Choose appropriately from among estimation, mental math strategies, and paper-and-pencil methods to multiply whole numbers.

The Making Connections in Multiplication Assessment Master and Feedback Box in the Lesson 7 Student Guide provide specific information on these Expectations.

The Workshop opportunities in this lesson are split into two parts. In Part 1, the Multiplication Digits Game is introduced and students practice using and making connections between different multiplication strategies and methods. In Part 2, students discuss and practice choosing appropriate strategies for given situations.

Using the Practicing Multiplication Strategies Workshop Menus in the Student Activity Book, students select problem sets on the basis of their own levels of confidence. In the Connecting Methods section, Questions 1–12 address student understanding of different multiplication methods and the connections between them [E3, E4]. In the Using Different Methods section, Questions 13–16 provide additional practice applying strategies and methods [E6, E7]. See Figure 2. The problem sets on the Workshop: Multiplication with Larger Numbers pages in the Student Guide address students' abilities to choose appropriate multiplication strategies [E6, E7, E8]. See Figure 3.

Students play the Multiplication Digits Game for skill practice. They played addition and subtraction versions of the game in previous units. Students will need a set of Digit Cards 0–9 they prepared in previous units or will prepare with the Masters provided.