Transcript MJ3 - Davidsen Middle School

MJ3
2.3.1 - Greatest Common Factor (Pg.
610)
Bellwork


1.
2.
3.
4.
Please take out your assignment from
yesterday and leave it on your desk so that I
can check it.
Simplify
5∙6
6 7
51
8 6
2 3/5 + 7 3/5
3–2
5 3
Before we begin…
Please take out your notebook and
get ready to work….
 Yesterday we reviewed adding,
subtracting, multiplying & dividing
fractions
 Today we will look at the greatest
common factor of two or more
numbers….this strategy can be
helpful when simplifying fractions…

Objective

Students will find the Greatest
Common Factor (GCF) of two or more
numbers
Greatest Common Factor
The greatest of the factors common to
two or more numbers is called the
Greatest Common Factor (GCF)
 There are 2 methods to find the GCF

List the factors for each number
 Use a factor tree

Listing the Factors

Demonstrate on Board how to list the
factors of 36 and 60
Creating a Factor Tree

Demonstrate on board how to create
a factor tree for 36 and 60
Your Turn

In the notes section of your notebook
use either method to find the GCF of
54, 81, and 90
Assignment

Text p. 610 # 1 - 18