Algebra Examples

, ,
Divide by .
To find the LCM for a list of fractions such as using GCF:
1. Find the LCM of and .
2. Find the LCM of and .
3. .
Calculate the LCM of the numerators .
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The LCM is the smallest number that all of the numbers divide into evenly.
1. List the prime factors of each number.
2. Multiply each factor the greatest number of times it occurs in either number.
Since has no factors besides and .
is a prime number
has factors of and .
: Occurs times.
has factors of and .
: Occurs times.
The LCM of is the result of multiplying all prime factors the greatest number of times they occur in either number.
The LCM of is .
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Multiply by .
Multiply by .
Multiply by .
Multiply by .
Find the GCF of the denominators .
Divide by .
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