Ladder Method The ladder Method is simply upside down division. You can use the ladder to find: LCM GCF Prime Factorization

Using Ladder Method to Find the LCM Find the LCM of 48 and 80. 2 48 80 Common Factors Once 2 24 40 2 12 20 2 6 10 3 5 Remaining Factors OR 485 = 240 803 = 240

Using Ladder Method to Find the GCF Find the GCF of 48 and 80. 2 48 80 Common Factors Once 2 24 40 2 12 20 2 6 10 3 5 = 16

Using Ladder Method to Find the Prime Factorization Find the Prime Factorization of 48 and 80. 2 48 80 Common Factors Go to BOTH 2 24 40 2 12 20 2 6 10 3 5 Remaining Factors 2 2 2 2 3 = 48 2  2  2  2  5 = 80