Least common multiple
Presentation
•
Mathematics
•
5th Grade
•
Medium
Sheila Dale
Used 461+ times
FREE Resource
10 Slides • 3 Questions
1
Least Common Multiple
LCM
2
Important vocabulary
multiples- products of a number when multiplied by 1, 2, 3, 4,
least- smallest, lowest
common- the same number that appears in both numbers.
Least common multiple (LCM)- the smallest multiple that 2 or more numbers have in common.
3
Steps to find the LCM
1. List multiples of each number Make sure you have correct multiples. (x1, x2 ,x3, etc.)
[Start with the larger number and find the first 5-6 multiples]. Then find the multiples of the smaller number.
2. When you get to the first number that is the same in both, you have found the LCM.
3. Write all work in neat orderly way.
4
2 ways to find the LCM.
1. List all the multiples and find the smallest multiple.
2. Prime factorization - factor tree
5
Poll
When finding LCM you must write all the factors of each number?
True
False
6
Find the LCM of each set of numbers.
LCM of 9 and 12
12 = 12, 24, 36, 48, 60...
LCM = 36
7
1.) Find LCM of 2 and 3
3 = 3, 6, 9, 12, 15....
2 = 2, 4, 6
LCM= 6
2.) Find the LCM of 12 and 24
8
Fill in the Blanks
3.) Find the LCM of 8 and 10. Work out the problem in your notebook and write your answer here.
Type answer...
9
Prime factorization- breaking down a composite number into its prime factors. (factor tree)
10
Find the prime factorization of 24. There is more than one way to start prime factorization. The next slide shows how you can find the prime factorization of 24.
11
12
Find the prime factorization of 60.
Find the prime factorization of 42.
13
Fill in the Blanks
Find the LCM of 7 and 9. Work out the problem in your notebook and record your answer here.
Type answer...
Least Common Multiple
LCM
Show answer
Auto Play
Slide 1 / 13
SLIDE
Similar Resources on Wayground
10 questions
Dividing Fractions
Presentation
•
5th Grade
9 questions
Multiply Decimals Review
Presentation
•
5th Grade
10 questions
Volume of a Prism
Presentation
•
5th Grade
11 questions
Reading and Writing Decimals Review
Presentation
•
5th Grade
12 questions
Adding fractions
Presentation
•
5th Grade
12 questions
Prime and Composite Numbers
Presentation
•
5th Grade
9 questions
Multiplying Whole Numbers
Presentation
•
5th Grade
11 questions
Classifying Quadrilaterals
Presentation
•
4th - 5th Grade
Popular Resources on Wayground
10 questions
Safety Day 2026 – Student Review
Quiz
•
9th Grade
21 questions
Continents and Oceans
Quiz
•
6th Grade
20 questions
Parts of Speech
Quiz
•
5th Grade
16 questions
Subject & Predicate
Quiz
•
5th Grade
25 questions
Multiplication Facts
Quiz
•
5th Grade
12 questions
Map Skills
Quiz
•
3rd Grade
22 questions
Continents and Oceans
Quiz
•
5th Grade
15 questions
Rounding Decimals
Quiz
•
5th Grade
Discover more resources for Mathematics
25 questions
Multiplication Facts
Quiz
•
5th Grade
15 questions
Rounding Decimals
Quiz
•
5th Grade
15 questions
Mastering Multiplication Facts 1-10
Quiz
•
5th Grade
10 questions
3 Digit by 2 Digit Multiplication
Quiz
•
5th Grade
70 questions
Multiplication Facts
Quiz
•
3rd - 6th Grade
10 questions
Adding and Subtracting Decimals
Quiz
•
5th Grade
30 questions
Multiplication Facts 1-12
Quiz
•
2nd - 5th Grade
15 questions
2 digit by 1 digit multiplication
Quiz
•
5th Grade