Chapter 8 Review

Chapter 8 Review

By Katie Landazuri

Poll

How ready do you feel for this test tomorrow?

• Give it to me!

• Meh

• Please help me

Factors

Factors are numbers that you multiply together to make a product.

​THEY ARE THE ANSWERS TO MULTIPLICATION PROBLEMS!!!!!

3 and factors of 15

15 is ​a product of 3 and 5.

Multiple Choice

What are ALL of the factors of 12?

• 1 and 12

• 1, 2, 3, 4, 6, and 12

• 12, 24, 36, 48, 64 and 72

• 1, 2, 3, 4, 6, 10, and 12

GCF-Greatest COMMON factor

The factor that two numbers share that is the LARGEST/GREATEST.​

To find it, you need to GO THROUGH THE PROCESS of writing out the factors of each number than figuring out the largest number that they share.​

Multiple Choice

What is the greatest common factor of 9 and 15?

• 1

• 3

• 6

• 8

Draw

Find the factors of 12, 21 and 30. Then circle the GCF.

Simplified Fractions

You are going to need to know how to write a fraction in the simplest form!

STEPS:

*** Remember– what you do to the top you HAVE to do to the bottom!!

Divide BOTH your numerator and denominator by the GCF.

2- DIVIDE

Look at your numerator and denominator, then find their GCF.

1-Find the GCF

3- Ask yourself, "Can it go lower?"

​1-Find GCF

2-Divide

3-Ask yourself

​

​Write 3/36 In simplest form

form

Multiple Choice

What is 25/30 in simplest form?

• 25/30

• 1/3

• 5/6

• 6/5

Least Common Multiple

*Mutiple=Multiply

Multiple Choice

What is the first step in finding the LCM of given numbers?

• List the multiples of each number.

• Multiply the numbers by each other.

• List the factors of each number.

• Divide the numbers by each other.

Example

What is the LCM of 3 and 9?

1-List the multiples of 3.

• 3, 6, 9, 12, 15, 18, 21, 24, 27

2-List the multiples of 9.

• 9, 18, 27, 36, 45, 54, 63

3- Find the SMALLEST/LEAST common number they SHARE.

• 9

Multiple Choice

Find the LCM of 4 and 9.

• 4

• 63

• 9

• 36

Comparing Fractions

Using >, <, or =.

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Draw

Compare 2/5 and 3/10

Draw

Compare 1/5 and 1/4.

Write Fractions as Decimals

• Get it to be over 10 or 100 FIRST by finding a way to get the denominator there. 

• Then, “what you do to the bottom you HAVE to do to the top!”

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Multiple Choice

What is 5/10 written in decimal form?

• 0.05

• 0.5

• 5.0

• 0.005