# Lesson 11 What’s the Difference?

• Let’s subtract fractions.

## Warm-up Number Talk: Subtracting Fractions

Find the value of each difference mentally.

## Activity 1 Greatest Difference

Use the directions to play Greatest Difference with a partner.

1. Spin the spinner.

2. Each player writes the number that was spun in an empty box for Round 1. Be sure your partner cannot see your paper.

3. Once a number is written down, it cannot be changed.

4. Continue spinning and writing numbers in the empty boxes until all 4 boxes have been filled.

5. Find the difference.

6. The person with the greatest difference wins the round.

7. After all 4 rounds, the player who won the most rounds, wins the game.

8. If there is a tie, players add the differences from all 4 rounds and the highest total difference wins the game.

Round 1

Round 2

Round 3

Round 4

## Activity 2 What is the Smallest Difference?

Use the numbers below to fill in the squares. Find each difference. Add the 2 differences together.

• 1

• 1

• 2

• 2

• 3

• 4

• 5

• 6