Year End Review

Numbers System

100

15−(−6)

21

200

−15+10

-5

300

(−8)(−6)

48

400

−36÷6

-6

500

A bank account drops $20, then increases $8. What is the total change?
 

-12

Ratios and Proportions

100

Find the unit rate: 24 cookies in 6 boxes

4 cookies per box

200

Write the ratio of 6 red marbles to 3 blue marbles in simplestt form

2:1

300

Solve:  5/8 = x/24 

15

400

If y=4x, what is y when x=5?

20

500

A shirt costs $20 and is 50% off. What is the discount?

$10

Expressions and Equations

100

Write an expression for “3 times a number n”

3n

200

5x−2x

3x

300

3x+4=10

x=2

400

1/2x + 2 = 6

x=2

500

3 times a number plus 2 equals 11. What is the number?

3

Circles, Surface Area and Volume

100

C=2πr 

Find the circumference if r=3

18.84

200

What is the diameter if the radius is 5?

10

300

Supplementary angles add to what number?

180°

400

A=1/2 bh

Find area of triangle: base 6, height 4

12

500

Find volume. 

Length: 5cm Width: 2cm Height: 3cm 

30cm

Statistics and Probability

100

True or False: A sample should represent the population

True 

200

Drawing names from a hat is what type of sampling?

Random 

300

Find the median: 3, 7, 9, 11, 13

9

400

Which has more variability: 2,2,2 or 1,5,9?

1,5,9

500

If an event is certain, its probability is…

1