# Group practice on adding and subtracting integers

## Group practice on solving problems on adding and subtracting integers.

This is a class set. Do not make any marks on this document.

### direction

Each of the students will need to record verbal model, expression, process and answer on notebook paper. Don’t forget the unit.

You need to use decimal in expression, process and answer if the question(s) is expressed in decimal form. You need to use fraction in expression, process and answer if the question(s) is expressed in fraction form. You can use either decimal or fraction in expression, process and answer if the question(s) is expressed in both decimal and fraction form.

Please write down name, date and period on their answer document. The title is group practice on solving problems on adding and subtracting integers.

### Example 1 (please read this example carefully)

Tanya made a deposit of \$150 into her checking account.

Then she withdrew \$255. The next day, she wrote a check for

\$145. She had \$350 in her account before any of these transactions. How much money is in her account now?

vm: money in her account + deposit – withdrawal – amount she wrote a check

Expression: 350 + 150 – 255 - 145

Process: = 500 – 255 - 145

= -245 – 145

= -\$390

### Problem 1

A group of campers set up their tent at 6.25 meters above sea level. They hike down a valley and stop 9.5 meters below where they set up camp. What is the campers’ elevation when they stop?

Draw a number line in your process to support your answer

### Problem 2

Sheri ended the game with –8.5 points in a trivia game.

On her last turn, she lost 6.25 points. How many points did she have before her last turn?

Draw a number line in your process to support your answer

### Problem 3

Theresa and Callie are playing a trivia game where you earn points by answering questions correctly and lose points by answering questions incorrectly. On Theresa’s last three turns, she answered a question correctly worth

200 points, answered a question incorrectly worth 325 points, then answered a question incorrectly worth 65 points. Now Theresa has –675 points. How many points did Theresa have before her last 3 turns? Explain.

### Problem 4

When the finance committee for the school dance, they had a balance of \$50.25 in their checking account. The committee deposited \$44 they received from ticket sales. Two students asked for refuns for their tickets. These tickets were worth a total of \$8. The treasurer wrote these students checks for their refunds. The committee paid \$50 the custodian for cleaning up. They received \$25 refund from the bakery and paid \$64 for the DJ.

What is the balance in the checking account after all of the transactions?

### Problem 5

Kirsten and Gigi are riding in hot air balloons. They start 500 feet above the ground. Kirsten’s balloon rises 225 feet, falls 105 feet, and then rises 445 feet. Every time Kirsten’s balloon travels up or down, Gigi’s balloon travels 15 feet farther in the same direction. Then both balloons stop moving so a photographer on the ground can take a picture. a) Find Kirsten’s final position relative to the ground.

b) Is Kirsten or Gigi closer to the ground when the photographer takes the picture?

### Problem 6

Anna and Maya are competing in a dance tournament where dance moves are worth a certain number of points. If a dance move is done correctly, the dancer earns points. If a dance move is done incorrectly, the dancer loses points. Anna currently has 225 points. a. Before her dance routine ends, Anna earns 75 points and loses 30 points. Write and solve an expression to find Anna’s final score. b. Maya’s final score is 298. Which dancer has the greater final score?