7th Grade Cumulative Review

Prime Factorization

100

Write the prime factorization of 250

2 xx 5^3

200

Using prime factorization, find the GCF of 12 and 27

3

300

Using Prime Factorization, find the LCM of 5 and 14

70

400

Are 12 and 10 relatively prime?

no

Fraction Operations

100

4 2/3 - 7 3/5

-2 14/15

200

(2x)/3-x/4+(5x)/6

(5x)/4

300

-4 2/3 + 4/6 x= -10 2/5

x = -8 3/5

-43/5

400

3(7x-4) = 4(2x+7)

3 1/13

500

-2 3/4 xx 11 1/5 

-30 4/5

Proportions

100

Solve this proportion:

7/(x+2)=8/18

55/4

200

Solve:

4/15 =(x-4)/30

x = 12

Fractions, Percents, Decimals

100

Turn into a fraction in simplest form:

23%

23/100

200

Write as a decimal:

120%

1.2

300

What number is 75% of 44?

33

400

What percent of 900 is 27?

3%

500

93 is 150% of what number?

62

Percent of Change

100

McDonald's Fries in the 50's: $.10

McDonald's Fries now: $2.39

Whats the percent of change?

2290%

200

McD's Ice Cream from the 70's: $.20

McD's Ice Cream from now: $1.00

400%

300

Find the percent of change:

Original: 25

New: 31

24%

400

You ordered a pizza, and the bill was $22.  What is the total cost if there's a 5% delivery charge and you give the delivery driver a 20% tip

$27.50

500

I = Prt

p = $400

r = 4%

t = 10 years

Find the interest

I = $160