LCM Part 2

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Taught by YourMathGal
  • Currently 4.0/5 Stars.
3620 views | 1 rating
Part of video series
Meets NCTM Standards:
Lesson Description:

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.

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

Questions answered by this video:
  • 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?
  • Staff Review

    • Currently 4.0/5 Stars.
    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.