Name:______Class:______Date______
SWBAT use lists to identify common multiples and the LCM of two or more numbers.
Do NowMs. Vinceslio has 28 inches of purple ribbon, 20 inches of green ribbon, and 16 inches of red ribbon. She needs to cut the ribbon into even pieces for an art project and doesn’t want to have any left over. What is the greatest length of ribbon pieces that she could use?
Ms. Vinceslio should cut the ribbon into ______inch strips.
Vocabulary
What is LCM?
LCM
The LCM is
Example: The LCM of 8 and 10 is ______
I Do
Find three common multiples for 3 and 5. Then find the LCM.
Multiples of 3:
Multiples of 5:
I Do – You Help
Find the LCM of 7 and 6.
Multiples of 7:
Multiples of 6:
You Do – I Help
Find 5 common multiples for each number. Then circle the LCM
4 and 5
4______
5______
Common Multiples:
______, ______, ______, ______, ______
LCM______
Bachelors Practice – You Do
Directions:
Write ______common multiples for each number then identify the LCM
1.) 12 and 8
12______
8______
Common Multiples:
______, ______, ______, ______, ______
LCM______
2.) 10 and 6
10______
6______
Common Multiples:
______, ______, ______, ______, ______
LCM______
3.) 3 and 13 JUST FIND THE LCM FOR THIS PART
LCM______
*Challenge: List 3 common multiples
5.) 8 and 4
Common Multiples
LCM______
6.) 5 and 12
Common Multiples
LCM______
7.) Reflection (Math Journal):
How is LCM related to other common multiples?
Masters Practice (Challenge Problems)
Find pairs of numbers that….
1.)Have an LCM that you could get by multiplying the two numbers
2.)Have an LCM that is less than the product of the two numbers
3.)Have an LCM that is equal to one of the two numbers
4.)Find the LCM of 12, 8, and 20
LCM Lists Exit Ticket
Mastered Almost Not Yet
1.) List the first 3 common multiples of 9 and 12
______, ______, ______,
2.) What is the LCM of 9 and 12 ______
LCM Lists HomeworkMust show all work and answer all problems to get full credit. Use Pencil.
List the first 5 common multiples of 13 and 5
____, ____, ____, ____, ____,