Transcript Prime and Composite Numbers & Composite Numbers

Prime and
Composite Numbers
& Composite
Numbers
Objective: I can distinguish prime and composite numbers.
Created by
Kim Balstad/Chris Garrison
Sycamore 5th grade (Revised by Marilyn Higginbotham)
QuickTime™ and a
decompressor
are needed to see this picture.
Essential Questions
QuickTime™ and a
decompressor
are needed to see this picture.
• What is a prime number? How is it
determined?
• What is a composite number? How is it
determined?
• Which number is special? How is different
from other numbers?
Essential Vocabulary
• What is a composite number?
–It’s a number with more than 2 factors.
Let’s look at an example: Is 24 a composite number?
24 = 1 x 24
24 = 2 x 12
24 is a composite number.
24 = 3 x 8
The factors of 24 are 1, 2, 3, 4, 6, 8, 12, 24.
24 = 4 x 6
24 has more than 2 factors!
Essential Vocabulary
• What is a prime number?
–A number with EXACTLY 2 factors (1 and itself)
Let’s look at an example: Is 5 a prime number?
5=5x1
5 is a prime number.
The factors of 5 are 1 and itself
5 has EXACTLY 2 factors! (1 and 5)
QuickTime™ and a
decompressor
are needed to see this picture.
The number 1!
SPECIAL
• Now, let’s talk about the
number.
• The number 1 is a special number because it’s
not prime or composite.
Think about it and be ready
to share: WHY is the number
1 neither prime or composite?
Quick Time™ and a
decompressor
are needed to see this picture.
Partner Share
• Turn to your partner and share facts about
each of these new terms.
• What is a composite number? How is it determined?
• What is a prime number? How is it determined?
• How is the number 1 special? Why?
Get out your SLATES!
Let’s practice what we know!
Is this number prime or
composite? Show all work and
carefully find all the factors!
15
Composite!
Is this number prime or
composite? Show all work and
carefully find all the factors!
9
Composite!
Is this number prime or
composite? Show all work and
carefully find all the factors!
17
Prime!
Is this number prime or
composite? Show all work and
carefully find all the factors!
1
I am special!
Is this number prime or
composite? Show all work and
carefully find all the factors!
27
Composite!
Is this number prime or
composite? Show all work and
carefully find all the factors!
23
Prime!
QuickTime™ and a
decompressor
are needed to see this picture.
Closure
OUTCOME
SENTENCES
Outcome Sentences
• Today I learned....
• I have a question about.....
• I would still like to know more about.....
15
Independent Practice
• FACTOR PEOPLE
• Use your student number
to create a factor person.
• Remember each factor
should go a separate arm or
leg.
• Select the correct cap:
prime, composite, or
special.
• Write a closure sentence
describing why your factor
person is prime, composite,
or special.
14
8