## LCM Part 2

LCM Part 2
• Currently 4.0/5 Stars.
3345 views, 1 rating - 00:08:41
Part of video series Least Common Multiple
Taught by YourMathGal

### Meets NCTM Standards:

More free YouTube videos by Julie Harland are organized at http://yourmathgal.com
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.
• Currently 4.0/5 Stars.
Reviewed by MathVids Staff on January 31, 2010.  