Review Topic 3 Part 1

Topic 3 Review Order of Operations, Prime Factors, GCF, and LCM

by Karen Martin

Multiple Choice

$$3^3\ =$$  

• 9

• 27

• 18

• 81

Multiple Choice

$$25^0\ =$$  

• 25

• 0

• 1

• 250

Multiple Choice

$$5^2\ =$$  

• 10

• 5

• 20

• 25

Multiple Choice

$$4^2\ \ \ \ \ \ \ \ \ \ 2^4$$  

• <

• >

• =

Multiple Choice

Compare:

5² 2⁵

• >

• <

• =

​Remember anything to the zero power = 1

​And anything to the power of one = itself

Multiple Choice

$$72^0\ \ \ \ \ \ \ \ \ \ \ 45^{1\ \ \ \ \ }$$  

• <

• >

• =

Multiple Choice

$$5^2\ \ \ \ \ \ \ \ \ \ 2^3$$  

• <

• >

• =

​Use factor trees to find the prime factorization of a number.

​

​36 = 2 • 2 • 3 • 3

​or

​36 = 2² • 3²

Multiple Choice

What is the prime factorization of 84?

• 2 • 2 • 3 • 7

• 4 • 21

• 2 • 3 • 7

• 2 • 6 • 7

Multiple Choice

What is the prime factorization of 45?

• 1 • 3 • 3 • 5

• 9 • 5

• 3 • 3 • 5

• 3 • 15

​Use division ladders to find the GCF and LCM

​

GCF = greatest common factor

​the biggest number that can divide

into them evenly

​

LCM = least common multiple

​The smallest number that is a multiple

​of the numbers. The original numbers

​are factors of the LCM.

Multiple Choice

Find the GCF of 48 and 60.

• 4

• 12

• 6

• 22

Multiple Choice

Find the GCF of 81 and 54.

• 27

• 3

• 9

• 18

​Factor out the GCF with the Distributive Property

Multiple Choice

Use GCF and the Distributive Property to write the FACTORED form of 81 + 18

• 3(9 + 6)

• 18(7 + 1)

• 9(9 +2)

Multiple Choice

Use GCF and the Distributive Property to write the FACTORED form of 44 + 77

• 11(4 + 7)

• 4 + 7(11)

• 11(4 +3)

Multiple Choice

Use GCF and the Distributive Property to write the FACTORED form of 30 + 45

• 15(2 + 3)

• 5(30 + 45)

• 5(6 + 8)

Multiple Choice

Find the LCM of 6 and 21

• 21

• 126

• 42

• 3

Multiple Choice

Find the LCM of 15 and 20.

• 5

• 60

• 300

• 30

​Follow the Order of Operations

Please practice more on your own. Use your notes. Good Luck!