Math 7 Module 3 Review Integer Operations

Integers and Absolute Values

100

|3|

3

200

|-9|

9

300

|-17|

17

400

Which is greater? |73| or |-81|

|-81| = 81

500

The elevation of Death Valley, in California, is -282 feet. The Mississippi River in Illinois has an elevation of 279 feet. Which is closer to sea level?

Mississippi River in Illinois

279 feet < |-282| feet

Adding Integers

100

-16 + (-11)

-27

200

-15 + 5

-10

300

100 + (-75)

25

400

-32 + (-2)

-34

500

Evaluate the expression when x=3, y=-4, and z=-6. 

x + y + z

-7

Subtracting Integers

100

8 - 18

-10

200

-16 - (-5)

-11

300

-18 - 7

-25

400

-12 - (-27)

15

500

You return several shirts to a store. The receipt shows that the amount placed back on your credit card is -$30.60. Each shirt is -$6.12. How many shirts did you return?

-$30.60 / -$6.12

= 5 shirts

Multiplying Integers

100

-8 x 6

-48

200

10 x (-7)

-70

300

-3 x (-6)

18

400

-12(5)

-60

500

Find the mean of the following integers:

-54, -88, 0, 54, 88

0 / 5

= 0

Dividing Integers

100

-18 / 9

-2

200

-42 / -6

7

300

84 / (-7)

-12

400

Evaluate the expression when x=3, y=-4, and z=-6. 

xy / z

2

500

Find the mean of the following integers:

-3, -8, 12, -15, 9

-5 / 5 

= -1