Name:______________________________________ Date:_____________ Section:___________________

“Adding and Subtracting Integer”

AssessmentDo not use a calculator.

1. Select all the true statements.

A. 2.3+(−2.3) is equal to zero.

B. (−3.7)+(−4.1) is positive.

C. −2.6−(−124

) is positive.

D.52+(−2.5) is negative.

E. 72−(−100) is negative.

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Name:______________________________________ Date:_____________ Section:___________________

2. A heron is perched in a tree 50 feet above sea level. Directly below the heron, a pelican is flying 17 feet above sea level. Directly below the birds is a trout, swimming 23 feet below sea level.

Select all the true statements.

A. The difference in height between the

pelican and the heron is -33 feet.

B. The difference in height between the

pelican and the heron is 33 feet.

C. The distance between the heights of the

pelican and heron is -33 feet.

D. The difference in height between the pelican and the trout is -40 feet.

E. The difference in height between the pelican and the trout is 40 feet.

F. The distance between the heights of the pelican and the trout is 40 feet.

heron

pelican

trout

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Name:______________________________________ Date:_____________ Section:___________________

3. Let x=−11

8 and y=−11

4 .

Which expression has a negative value? Show or explain how you know.

A. x+ yB. x− y

4. Solve this equation.

12−b=12.5

5. a. The table shows transactions from five different bank accounts. Fill in the missing numbers.

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Name:______________________________________ Date:_____________ Section:___________________

b. Explain what each of the numbers -10, -20, and -30 tells you about Account 5.

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Name:______________________________________ Date:_____________ Section:___________________

6. Joseph walks up to a tank of water that can hold up to 10 gallons. When it is active, a drain empties water from the tank at a constant rate. When Joseph first sees the tank, it contains 7 gallons of water. Three minutes later, the tank contains 5 gallons of water.

A. At what rate is the amount of water in the tank changing? Use a signed number, and include the unit of measurement in your answer.

B. How many more minutes will it take for the tank to drain completely? Explain or show your reasoning.

C. How many minutes before Jada arrived was the water tank completely full? Explain or show your reasoning.

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