How to Find the LCM Using the Prime Factors Method | LCM of 15 and 18 | Part 1 of 2 | Minute Math

In this video we learn how to find the LCM using the prime factors method. We find the LCM of 15 and 18.

The steps on how to find the LCM using the prime factors method are:

1. Find the prime factorization of each number.
2. Write each number as a product of primes, matching primes vertically when possible.
3. Bring down the primes in each column.
4. Multiply the factors to get the LCM.

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Here is the link to our website which covers this topic more in depth: https://minutemath.com/pre-algebra/prime-factorization-and-the-least-common-multiple/

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Revision and Adaptation. Provided by: Minute Math. License: CC BY 4.0 CC Licensed Content, Shared Previously

Marecek, L., Anthony-Smith, M., & Mathis, A. H. (2020). Use the Language of Algebra. In Prealgebra 2e. OpenStax. https://openstax.org/books/prealgebra-2e/pages/2-5-prime-factorization-and-the-least-common-multiple. License: CC BY 4.0. Access for free at https://openstax.org/books/prealgebra-2e/pages/1-introduction ... https://www.youtube.com/watch?v=ikrQsgOMUrs