# Lesson 9 Multiplication Game Day

• Let’s play multiplication games.

## Warm-up Number Talk: Multiplying Large Factors

Find the value of each expression mentally.

## Activity 1 Introduce Rectangle Rumble and How Close?

Directions for Rectangle Rumble:

• Each partner:

• Spin each spinner.

• Shade in a rectangular area to represent the product of the two numbers.

• Take turns until the grid can’t fit any more rectangles.

• Add up your total area. The partner with the greatest total square units wins.

Directions for How Close?:

• Each partner:

• Take 4 cards.

• Choose 2–3 cards to multiply.

• Write an equation to show the product of the numbers you chose.

• Your score for each round is the difference between your product and 100.

• Take new cards so that you have 4 cards to start the next round.

• At the end of the game, add your scores from each round. The player with the lowest score wins.

## Activity 2 Choice Time: Multiplication Games

Choose a center to practice multiplying within 100.

• Compare, Multiply within 100: Decide which expression has the greatest value.

• How Close? Multiply to 100: Choose 2–3 numbers to multiply to get a product closest to 100.

• Rectangle Rumble, Factors 1–10: Multiply numbers to create rectangular areas to fill a grid with the most squares.