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

2. Using Ladder Method to Find the LCM
Find the LCM of 48 and 80. 2
Common
Factors
Once 2 2 2
Remaining
Factors OR
485 = 240
803 = 240

3. Using Ladder Method to Find the GCF
Find the GCF of 48 and 80. 2
Common
Factors
Once 2 2 2
= 16

4. Using Ladder Method to Find the Prime Factorization
Find the Prime Factorization of 48 and 80. 2
Common
Factors
Go to
BOTH 2 2 2
Remaining
Factors
2 2 2 2 3 = 48
2  2  2  2  5 = 80