Coolmath Pre-Algebra
Greatest Common Factors and Least Common
Multiples lesson 2 - Greatest Common Factors
(page 1 of 11)
---- This pre-algebra lesson explains what the
greatest common
factor (gcf) (also called greatest common divisor (gcd)) is
and gives three methods of how to find it (lists, prime
factorization and Euclidean Algorithm). |
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For smaller numbers, finding the
greatest common factor (GCF) is really easy. You just find all
the common factors, like in the last lesson... and pick the biggest
one! (This is also
called "greatest common divisor" or "GCD.")
Let's look at some from the last
section:
| Find the
GCF of |
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and |
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: |
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List the factors
of each: |
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Circle
the common factors: |
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Grab the greatest common factor |
The special
math notation for this is
Continued on the
next
page
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The printing
and distribution and/or downloading of these lessons is strictly
prohibited. |
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