Operations on Integers

Addition/Subtraction

1

59 - 24

35

2

-31 - (-65)

34

3

-12 - 13

-25

4

When Drew woke up, his temperature was 109 degrees Fahrenheit. Two hours later, it was 3 degrees lower. What was his temperature then?

106 degree Fahrenheit

5

An elevator is on the twentieth floor. It goes down 11 floors and then up 5 floors. What floor is the elevator on now?

6th floor

Multiplication/Division

1

10 x (-20)

-200

2

-64 x 2

-128

3

-172 ÷ (-2)

86

4

The price of one share of stock fell 200 pesos each day for 8 days. How much value did one share of the stock lose after 8 days?

-1600

One share of a stock is now worth 1600 pesos less.

5

A test has 20 questions. The test awards 3 points if the answer is correct and takes away 1 point of the answer is incorrect. A student answered 5 questions incorrectly. How many points did the student lose?

-5

The student lost points after answering five questions incorrectly.