Instructional Video

Least Common Multiple

Curated and Reviewed by Lesson Planet

Prepare your classes for future work by reinforcing multiples and finding least common multiples. Learners see how to identify the least common multiple of a set of numbers. The instructor shows examples including a set of two and a set of three numbers. 

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Additional Tags
Instructional Ideas
  • Introduce the lesson by giving each pupil a different number and ask them to find the first 10 multiples of their number; use the multiples later to find least common multiples of their numbers
  • Post the video as a homework reference
Classroom Considerations
  • Expects an understanding of using factor trees to find prime factors and representing the prime factorization using exponents
  • This video is hosted on YouTube
  • Shows multiple methods for finding the least common multiple
  • Does not provide an explanation of mathematics behind using factor trees to identify the least common multiple
Common Core