1. Find LCM
The least common multiple is the smallest of the common multiples
Warm-Up: CR on Integers

2. Toolbox:
Multiple: the answers to the multiplication tables for a given number
Common: #’s in both/all sets of data
STEPS:
List all multiples for all given numbers
Circle first # that is common to both/all sets of numbers
Exit Question:
Find LCM and GCF of 20 and 32
LEAST COMMON MULTIPLE NOTES (LCM
Example: Find LCM of 8 and 12
8 = 8, 16, 24, 32, 40, 48, 56
12 = 12, 24, 36, 48
24 is the LCM.

3. Practice on Finding LCM and GCF
1. Find LCM and GCF of 20 and 30 30
2 x x 15
2 x x 3
20 = 2 x 2 x = 20,40,60,80,100
30 = 2 x 3 x = 30, 60, 90
GCF = 2 x 5 = The LCM is 60

4. Find LCM and GCF of…. Write hw on pg.36
1. 12, 9
and 15
3. 3 and 6
4. 9 and 30
and 30

5. Exit Question….
Find LCM and GCF of 20 and 32