Least    Common    

Multiple I can find the LCM of two whole

numbers less than or equal to 12.

Flashback

Warm Up Write the first five multiples of each number

1. 5

2. 6

3. 10

4. 12

5, 10, 15, 20, 25

6, 12, 18, 24, 30

10, 20, 30, 40, 50

12, 24, 36, 48, 60

Go to our class website. Click on the link to

the LCM Nearpod.

Put in the following class code!

With your shoulder partner ,

Think about this- English muffins come in packs of 8, and

eggs come in cartons of 12. If there are 24 students, what is the least

number of packs and cartons needed so that each student has a muffin

sandwich with one egg and there are no muffins left over?

3 packs of English Muffins

2 cartoon of eggs

When we find the smallest amount that both 8 and 12 go into evenly, we are finding the LCM

The smallest number that is a multiple of two or more

numbers is the least common

multiple (LCM).

To find the LCM

1.  List the multiples of each number

2.  Find the smallest (least) multiple that each number

shares

Example: Find the LCM of 8 and 12  

Example: Find the LCM of 8 and 12 1.  List the multiples of each number

8: 8, 16, 24, 32, 40, 48…

12: 12, 24, 36, 48…

2. Find the smallest (least) multiple that each number shares

Example: Find the LCM of 8 and 3  

Example: Find the LCM of 8 and 3 1.  List the multiples of each number

8: 8, 16, 24, 32, 40, 48…

3: 3, 6, 9, 12, 18, 21, 24

2. Find the smallest (least) multiple that each number shares

Example: Find the LCM of 5 and 10  

Example: Find the LCM of 5 and 10 1.  List the multiples of each number

5: 5, 10, 15, 20, 25, 30…

10: 10, 20, 30, 40, 50…

2. Find the smallest (least) multiple that each number shares

Example: Find the LCM of 3 and 5  

Example: Find the LCM of 3 and 5 1.  List the multiples of each number

3: 3, 6, 9, 12, 15, 18, 24…

5: 5, 10, 15, 20, 25, 30…

2. Find the smallest (least) multiple that each number shares

Example: Find the LCM of 6 and 5  

Example: Find the LCM of 6 and 5 1.  List the multiples of each number

6: 6, 12, 18, 24, 30, 36

5: 5, 10, 15, 20, 25, 30, 35, 40…

2. Find the smallest (least) multiple that each number shares

Example: Find the LCM of 9 and 12  

Example: Find the LCM of 9 and 12 1.  List the multiples of each number

9: 9, 18, 27, 36, 45, 54, 63…

12: 12, 24, 36, 48…

2. Find the smallest (least) multiple that each number shares

Example: Find the LCM of 3 and 4  

Example: Find the LCM of 3 and 4 1.  List the multiples of each number

3: 3, 6, 9, 12, 15, 18…

4: 4, 8, 12, 16, 20…

2. Find the smallest (least) multiple that each number shares

Least    Common    

Multiple Kahoot

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