Finding the LCM

Least- Smallest
Common- something shared
Multiple- how we "count" by a number (said number mutlipled by a whole number)

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What is Least Common Multiple?

Method #1- Listing Method

List out the first 4-5 multiples of each number and see if they have any in common. If not, list out the next 4-5 and repeat.

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How do you find the LCM

Find the LCM of 8 and 12 using the listing method.

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Method #2- Factor Tree

Create a factor tree for both of the numbers. Any primes they have in common, you take and multiply together. Any the don't have in common, you take out and multiply as well.

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How do you find the LCM

Find the LCM of 8 and 12 using the factor tree method.

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Method #3- Division Method/Birthday Cake

Do the division/birthday cake for both numbers at the same time. Once completed, circle all the outside numbers.

How do you find the LCM

Find the LCM of 8 and 12 using the division method.

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