Transcript GCF - simonbaruchcurriculum

GCF
SWBAT find the gcf of two or more
numbers and determine if the numbers
are relatively prime
• Homework: GCF
Vocabulary
• 1.) Prime Numbers are numbers with exactly
_____ factors, 1 and itself.
• Examples:
• 2.) Composite Numbers are numbers with
_______ than 2 factors.
• Examples:
Vocabulary
• 3.) The number ______ is not prime nor composite
because it only has ____ factor.
• 4.)
The _____________ ________________
____________________ (or gcf) of two or more
numbers is the largest f actor that both numbers have in
common.
• Example: The GCF of 12 and 18 is ________
I Do
I Do - You Help
Find the GCF of 15 and 7
15
7
Relatively Prime means that the GCF of
two numbers is _______
You Do - I Help
Find the GCF of 8 and 24
8
24
Are these numbers relatively prime?
Partner Practice
Find the GCF of 25 and 15 using factor houses
Bachelors Practice
Find the GCF of 16 and 30 using factor houses
BP # 2
Find the GCF of 20 and 19 using factor houses
BP # 3
Find the GCF of 12 and 24 using factor houses
BP # 4
Find the GCF of 26 and 28 using factor houses
BP # 5
Which set of numbers from the
last few problems that you tried
are relatively prime? Explain
Masters Practice
Exit Ticket
1.)
Find the GCF of 20 and 16 using
factor houses
Exit Ticket
2. Find the GCF of 15 and 26 using factor houses
Exit Ticket
3.) Which set of numbers from above
are relatively prime? (circle one)
a.
20 and 16
b.
15 and 26
Extra