# Lesson 10 Here Comes the Sum

• Let’s play some games to practice adding fractions.

## Warm-up Number Talk: Adding Fractions

Find the value of each expression mentally.

## Activity 1 Greatest Sum

Use the directions to play Greatest Sum 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 sum.

6. The person with the greater sum 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 sums from all 4 rounds and the highest total sum wins the game.

1. Round 1

Round 2

Round 3

Round 4

2. Total sum of all rounds.

## Activity 2 Smallest Sum

Use the directions to play Smallest Sum 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 sum.

6. The person with the lesser sum 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 sums from all 4 rounds and the lesser total sum wins the game.

1. Round 1

Round 2

Round 3

Round 4

2. Total sum of all rounds.