Least Common Multiple - Add and Subtract Fractions | CAVEMAN CHANG

For one number to be a multiple of another number, the one number multiplied by some whole number equals the other number. Finding the Least Common Multiple (LCM) of a group of number is to look at all the multiples and find the smallest number that each number shares. We take each number for which we are looking for the LCM and break it down into its prime factors. Look at all the unique prime factors and choose the ones that have the highest exponent. Multiply those unique prime factors together and the end result is the Least Common Multiple. This is a great tool that helps with adding and subtracting fractions.

Link to Prime Factorization Video: https://rumble.com/vkpyg4-prime-factorization-composite-numbers-and-fundamental-theorem-of-arithmetic.html

Practice Problems:
Level 1: lcm[12,52] is 156.
Level 2: lcm[8,20,48] is 240.
Level 3: 7/54 + 5/12 + 3/8 = 199/216