9The Least Common Multiple of two or more numbers is the smallest number that is a multiple of every number.
10Listing the multiples Using the Ladder There are two methods for finding the LCM.Listing the multiplesUsing the Ladder
11To find the LCM of two numbers using a list, list the first ten multiples of one number. Then list the first ten multiples of the second number. The LCM is the smallest value that appears on both lists. (You might need to add more than the first ten multiples of each number)
12Make a list to find the LCM of 6 and 15. 6: 6, 12, 18, 24, 30, 36, 42, 48, 54, 6015: 15, 30, 45, 60, 75, 90, 105, 120, 135, 150
13To find the LCM of two number using the ladder method, determine a number that you can divide evenly into each number. Write the number on the side and divide. Continue as far as you can!
14Use the ladder method to find the LCM of 27 and 36. 3 43x3x3x4 =9 x 12=108
15Use the ladder method to find the LCM of 20 and 24. 20 24
16Use the ladder method to find the LCM of 9 and 12. 9 12
17Use the ladder method to find the LCM of 8 and 6. 8 6