Lesson: Greatest Common Factor - Notes And Warm Up
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1Name: __________________________________________ Period _____ Date ________________________
Lesson: Greatest Common Factor – Notes & Warm Up
WARM UP:
Use T-charts to list the factors of 18
and
factors of 12
18
12
1
18
1
12
2
9
2
6
3
6
3
4
6
3
4
3
9
2
6
2
18
1
12
1
ESSENTIAL:
How do we determine the greatest common factor of two or
QUESTION
more numbers?
1) List the factors of each number.
2) Circle the “shared” factors (the factors that they have in common.)
3) The “largest shared” factor is the GCF.
Vocabulary:
Factors:
Numbers that you can _multiply_________
together to get a ____product_____________
Example:
5 is a factor of 10
Because
2 x 5 = 10
and
10 ÷ 5 = 2
Greatest Common Factor:
The __largest______ factor that two or more
(GCF)
numbers have in common (share).
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