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Greatest Common Factors

The document discusses greatest common factors (GCF). It defines the GCF as the highest number that divides exactly into two or more numbers. Finding the GCF is useful for simplifying fractions. It provides examples of finding the GCF of different number pairs using the listing method, which involves finding all common factors and identifying the greatest among them. The document suggests finding the GCF allows solving problems involving putting numbers into boxes or groups in the largest equal amounts.

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Clouie Evangelista
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55 views11 pages

Greatest Common Factors

The document discusses greatest common factors (GCF). It defines the GCF as the highest number that divides exactly into two or more numbers. Finding the GCF is useful for simplifying fractions. It provides examples of finding the GCF of different number pairs using the listing method, which involves finding all common factors and identifying the greatest among them. The document suggests finding the GCF allows solving problems involving putting numbers into boxes or groups in the largest equal amounts.

Uploaded by

Clouie Evangelista
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as PPTX, PDF, TXT or read online on Scribd
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Greatest Common Factors

Prepared by:

Villamor R. De Leon
Dalampang ES
Greatest Common Factors

• The highest number that divides exactly


into two or more numbers.

• It is the "greatest" thing for


simplifying fractions!
How many prime numbers are there from 1
to 20? What are they?
How do you show helpfulness at home? In school?
Is it good to be helpful? Why?
Arnel helps his father in their
bakeshop. They bake 48 cupcakes and
60 cookies. They plan to pack them
separately in a small boxes. What is
the biggest number of cupcakes and
cookies that can be placed in boxes
if these are of the same number?
•How are we going to solve for
the answer?
•To answer this problem, we
find the Greatest Common
factor (GCF) of 48 and 60.
Pair square/4 members in each group
• Find the common factors and the GCF
of 15 and 20?
• Find the common factors and the GCF
of 24 and 32?
• Find the common factors and the GCF
of 12, 26 and 30?
• How did you get your answer?
What method did you use?
Solve the problem by using the listing method.

Sandy’s vegetable store had 24 customers


in the morning and 16 customers in the
afternoon. What was the largest number of
customers who went so that every hour had
the same number of customers?
•What do you mean by common
factors? GCF?

•What method did you use to


find the GCF of two or more
numbers?
Find the GCF of each pair of
numbers using the listing method.
1. 10 and 15
2. 18 and 21
3. 12 and 24
4. 8 and 20
5. 14 and 28

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