Finding the Greatest Common Factor<br />
The greatest common factor of two or more numbers is the greatest number that is a factor of every number.<br />
   There are two methods for finding the GCF.1.  Listing the factors2.  Using the Ladder<br />
To find the GCF of two numbers using a list, list the factors of one number.  Then list the factors of the second number. ...
1. Make a list to find the GCF of 18 and 3018:  1, 2, 3, 6, 9, 1830: 1, 2, 3, 5, 6, 10, 15, 30<br />THE GCF of 18 and 30 i...
To find the GCF of two numbers using the ladder method, determine a prime number that you can divide evenly into each numb...
2. Use a ladder to find the GCF of 27 and 36<br />3 <br />27 36 <br />3 x 3 =9 so the GCF is 9<br />9 12<br />3 <br />3 4<...
Upcoming SlideShare
Loading in...5
×

Greatest Common Factor

6,778

Published on

Published in: Technology, Health & Medicine
2 Comments
2 Likes
Statistics
Notes
  • The ladder method is so difficult for all of my students, I find just listing the factors is much easier for them to comprehend.
       Reply 
    Are you sure you want to  Yes  No
    Your message goes here
  • I like how you included the ladder method. I find that is easier for some students.
       Reply 
    Are you sure you want to  Yes  No
    Your message goes here
No Downloads
Views
Total Views
6,778
On Slideshare
0
From Embeds
0
Number of Embeds
3
Actions
Shares
0
Downloads
112
Comments
2
Likes
2
Embeds 0
No embeds

No notes for slide

Greatest Common Factor

  1. 1. Finding the Greatest Common Factor<br />
  2. 2. The greatest common factor of two or more numbers is the greatest number that is a factor of every number.<br />
  3. 3. There are two methods for finding the GCF.1. Listing the factors2. Using the Ladder<br />
  4. 4. To find the GCF of two numbers using a list, list the factors of one number. Then list the factors of the second number. The GCF is the greatest value that appears on both lists.<br />
  5. 5. 1. Make a list to find the GCF of 18 and 3018: 1, 2, 3, 6, 9, 1830: 1, 2, 3, 5, 6, 10, 15, 30<br />THE GCF of 18 and 30 is 6.<br />
  6. 6. To find the GCF of two numbers using the ladder method, determine a prime number that you can divide evenly into each number. Write the number on the side and divide. Continue as far as you can!<br />
  7. 7. 2. Use a ladder to find the GCF of 27 and 36<br />3 <br />27 36 <br />3 x 3 =9 so the GCF is 9<br />9 12<br />3 <br />3 4<br />
  1. A particular slide catching your eye?

    Clipping is a handy way to collect important slides you want to go back to later.

×