### 11 videos in "Least Common Multiple and Greatest Common Factor"

## LCM Part 2

More free YouTube videos by Julie Harland are organized at http://yourmathgal.com

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Least Common Multiple-shows a way to find the LCM of a list of numbers using a building approach from prime factorization of the numbers.

- What is the least common multiple of a list of numbers?
- How can you find the LCM of a list of numbers by building it up?
- How can you find the LCM of 12, 45 and 35 by building factors of each number into the LCM?
- How can you find the LCM of 4, 5, 6, 7, 8, 9, and 10 by building factors of each number into the LCM?
- How can you find the LCM of 6, 9, 10, 15, and 18 by building factors of each number into the LCM?
- How can you find the LCM of 14, 15, 20, 25, and 28 by building factors of each number into the LCM?
- How can you find the LCM of 21, 35, 49, and 60 by building factors of each number into the LCM?

This lesson shows a really cool way of building the LCM of a list of numbers by making sure the LCM contains factors that make up each number in the list. This method really seems to be quicker and easier than making a factor tree.