Review: Integer Operations

Integer Applications

100

The temperature fell a total of 12^oF in 4 hours. How much did it change each hour?

-3^oF

200

A football team lost 3 yards on each of the 4 plays they ran. What was their overall change in yardage?

-12 yards

300

Harry missed 16 points on a test. Harry went back and tried to correct some questions and earned 12 points back. How many points has Harry lost/gained now?

-4 points

Lost 4 points

400

A diver travels 30 feet below sea level then up 20 feet, then down 80 more feet. What is her location relative to sea level?

-90 feet

500

In a games, Allison won 5 points, then lost 8 points, then lost another 7 points and finally won 10 points. How many points did she end up with?

0 points

600

A roller coaster climbs 105 feet on the first hill then drops 30 feet down. On the second hill the roller coaster climbs another 50 feet then drops 20 feet. What is the height at the end of the second hill?

105 + (-30) + 50 + (-20) = 105

Adding Integers

100

25 + 27 

52

200

-37 + (-13) 

-50

300

(-15) + 15 

0

400

-12 + 9

-3

500

8+(-15)

-7

600

987 + (-34) 

953

Subtracting Integers

100

38 - 15

23

200

9 - (-20)

29

300

32 - (-14) 

46

400

-97 - (-82) 

 -15

500

-49 - 22 

-71

600

(-9) - (-83) 

74

Multiplying Integers

100

(100)(4)

400

200

(8)(-4)

-32

300

-12 x 5 

-60

400

5 x (-25)

-125

500

-13(-4)

52

600

(34)(-21)

-714

Dividing Integers

100

100 / 4 

25

200

8 / (-4) 

-2

300

-48 / 6 

-8

400

-120 / -40 

3

500

-350 / 50 

-7

600

2694/ -3

-898