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# Prime and Composite Numbers - PowerPoint PPT Presentation

Prime and Composite Numbers. GLE 0406.2.3 Identify prime and composite numbers. Main Goal for Today:. Standard Addressed: GLE 0406.2.3 Identify prime and composite numbers. But…. What are Prime and Composite Numbers?. Identify Prime and Composite Numbers.

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Prime and Composite Numbers

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## Prime and Composite Numbers

GLE 0406.2.3 Identify prime and composite numbers.

### Main Goal for Today:

GLE 0406.2.3 Identify prime and composite numbers.

But…. What are Prime and Composite Numbers?

### Identify Prime and Composite Numbers

• Prime Numbers- A whole number greater than 1 that has exactly two factors, 1 and itself.

• Composite Numbers- A whole number greater than 1 that has more than two factors.

Look @ these Numbers Factors

• 21, 2

• 31, 3

• 41, 2, 4

• 51, 5

• 61, 2, 3, 6

• Brain Pop

### Bring the number to life!

Items in use: Connecting cubes and white boards

Show me the ways one could arrange the connecting cubes (arrays) for the number 4 ? Then, write all the possible factors for this number on the whiteboards. Classify prime or composite. Why?

• numbers 1-10

### Hundreds Chart

We are Greek Mathematicians and we are on the hunt for prime numbers!

Instructions:

• put a triangle around the number that is neither prime nor composite,

• circle the Prime Numbers

• mark out the Composite Numbers 1-100.

• *There are 25 prime number in total between 1-100.

### Where do you belong?

Card Sort

• Composite vs. Prime

• Why do you belong there?

• Hand Transition Activity

### Fruit Shoot Virtual Manipulative

Math Games: Prime and Composite Numbers- Fruit Shoot

### Share your thinking while you work!

Tic Tac Toe Game…Lets take a look

• Partners of 2 (neighbor)

• Two sided (7-8 minutes a side)

• Foam squares and dice

• May use 100’s chart as guide

• Review Instructions before start!

### Answer and you shall see prime and composite number are easy!

• How are composite numbers and prime numbers different?

• Give an example of an odd number that is composite?(whiteboards)

• What is the only even prime number? (whiteboards)

• Roger has 47 cars. Can he group them more than two ways?

• Why is 1 neither prime nor composite?

• What’s another way in math that we could use prime and composite numbers other that just identifying and classifying them.

### Think- Pair- Share

• Kyle has 17 toy trucks. How many ways can the trucks be placed in equal groups?

• 5 ways

• 2 ways

• 3 ways

• Marla says that every number in the nineties is composite. Jackie says that one number in the nineties is prime. Who is correct? Explain.

### The end….

• What was the main goal for today’s learning?

• Students will be able to……

### What’s the one thing that stuck out to you the most?

• Exit Ticket

• http://mathforum.org/library/drmath/view/57182.html