factors and GCF

VOCABULARY



FACTORS=factors are numbers that are divisable by a number.









FACTORS



This is how you find the factors of a number. First you need to know the divisibility rules.(rules that help you find out if a number is divisible by a number.) Then you list the factors of the number wich are numbers that can go into the number.all of those numbers that you listed are called factors.

ex. 22= 1,22,2,11,
those are the factors of 22



GREATEST COMMON FACTOR

This is how you find the greatest common factors or GCF. First a GCF is a number that is the highest that is divisible by both of your numbers. So to find the GCF you would have to list the factors of the numbers or you can just list the factors of the smallest number. Now what is the highest factor in your list that is divisible by that number and the other? That number then is your GCF.

ex. 20= 1,20,2,10,4,5
4o=
20 is the GCF


check out this web page for more help!

http://http://www.math.com/school/subject1/lessons/S1U3L1GL.html