Least common multiple

3 videos
1 skill
Life is good, but it can always get better. Just imagine being able to find the smallest number that is a multiple of two other numbers! It's called the LCM or Least Common Multiple. Other than making your life more fulfilling, lcm will allow you to do incredible things like adding fractions. Common Core Standard: 6.NS.B.4

How to find the least common multiple of two numbers (example)

VIDEO 4:16 minutes
Sal finds the lcm (least common multiple) of 12 and 36, and of 12 and 18. He shows how to do that using the prime factorization method, which is a just great!

How to find the least common multiple of two numbers with repeating factors (example)

VIDEO 2:35 minutes
Sal finds the lcm (least common multiple) of 25 and 30.

How to find the least common multiple of three numbers (example)

VIDEO 5:24 minutes
This least common multiple example gives us 3 numbers from which to find the lcm. This is a challenge, but fun. Do it with us!

Least common multiple

PRACTICE PROBLEMS
Find the lcm (least common multiple) of pairs of integers.