Integer Operations Review

Addition

100

-9 + (-8)

-17

200

-12 + (-25)

-37

300

-7 + 3

-4

400

19 + (-13)

6

500

15 + (-24)

-9

Subtraction

100

-9 - 4

-13

200

5 - 8

-3

300

6 - 14

-8

400

-12 - (-17)

5

500

32 - (-7)

39

Multiplication

100

-2 x 5

-10

200

(-7) x (-12)

84

300

(-9)(-7)

63

400

(-5)(-6)(8)

240

500

(-5)(-8)(-12)

-480

Division

100

-18 ÷ 3

-6

200

(-49) ÷ (-7)

7

300

(-54) ÷ 6

-9

400

(-132) ÷ (-11)

12

500

210 ÷ (-14)

-15

Story Problems

100

Fluffy (the dog) lost 5 pounds when he was more active over the summer, but gained 3 pounds over the winter. Write the total weight gain or loss as an integer.

-5 + 3

-2

200

For the past six years, the population of a city decreased by 23 people per year. What is the population change over the last six year?

(-23) x 6

-138

300

The faucet in the kitchen is leaking 14 ounces of water each hour. What was the output of water over a seven hour period?

-98 ounces

400

Lake Michigan is 922 feet below sea level. Lake Ontario is 283 feet below sea level. What is the difference between the two depths written as integers?

-283 - (-922)

639 feet below sea level

500

Yesterday it was -4 degrees Celsius. Today, it is 2 degrees Celsius. What is the change in temperature written as an integer?

6 degrees Celsius