1. Add or subtract. Write in simplest form. 1. 2.
5. Yesterday, Michael ran miles. Today, Michael ran miles. How many more miles did Michael run today than yesterday?
6. In January, the town water tower was full. In April, it was full. By what fraction did the water level decrease?
Course 2, Chapter 4 PSI

2. ANSWERS
Course 2, Chapter 4 PSI

3. WHAT happens when you add, subtract, multiply, and divide fractions?
The Number System
WHAT happens when you add, subtract, multiply, and divide fractions?
Course 2, Chapter 4 PSI

4. The Number System
The Draw a Diagram problem-solving strategy to represent a mathematical problem visually
Course 2, Chapter 4 PSI

5. Course 2, Chapter 4 PSI

6. The Number System
Course 2, Chapter 4 PSI

7. Course 2, Chapter 4 PSI

8. Course 2, Chapter 4 PSI

9. Case #3 Fractions Read the problem. What are you being asked to find?
The Number System
Case #3 Fractions
Marta ate a quarter of a whole pie. Edwin ate of what was left. Cristina then ate of what was left.
What fraction of the pie remains?
Read the problem. What are you being asked to find?
What is your strategy to solve this problem?
Use your strategy to solve the problem.
Does your answer make sense? Use information from the problem to check your answer.
Course 2, Chapter 4 PSI

10. Case #4 Games Read the problem. What are you being asked to find?
The Number System
Case #4 Games
Eight members of a chess club are having a tournament. In the first round, every player will play a chess game against every other player.
How many games will be in the first round of the tournament?
Read the problem. What are you being asked to find?
What is your strategy to solve this problem?
Use your strategy to solve the problem.
Does your answer make sense? Use information from the problem to check your answer.
Course 2, Chapter 4 PSI

11. The Number System
Case #5 Distance
Alejandro and Pedro are riding their bikes to school. After 1 mile, they are of the way there.
How much farther do they have to go?
Read the problem. What are you being asked to find?
What is your strategy to solve this problem?
Use your strategy to solve the problem.
Does your answer make sense? Use information from the problem to check your answer.
Course 2, Chapter 4 PSI

12. The Number System
Case #6 Seats
The number of seats in the first row of a concert hall is 6. The second row has 9 seats, the third row has 12 seats, and the fourth row has 15 seats.
How many seats will be in the eighth row?
Read the problem. What are you being asked to find?
What is your strategy to solve this problem?
Use your problem-solving strategy to solve the problem.
Does your answer make sense? Use information from the problem to check your answer.
Course 2, Chapter 4 PSI