Least Common Multiple (LCM)
Presentation
•
Mathematics
•
5th Grade
•
Hard
Joseph Anderson
FREE Resource
4 Slides • 6 Questions
1
Least Common Multiple (LCM)
6.PAR.6.2 Determine greatest common factors and least common multiples using a variety of strategies to make sense of applicable problems.
Example
Hotdogs come in a package of 8 and buns in a package of 12. How many packages of hot dogs and packages of buns would you need to purchase to have an equal number of hot dogs and buns?
2
Least Common Multiple (LCM)
The least common multiple (LCM) is the smallest number that two or more numbers can divide into evenly.
KEY 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.
3
Multiple Choice
4
Example:
Factor Tree
5
Multiple Choice
What are the 2 methods we can use to find the LCM of numbers?
Addition and Multiplication
Subtraction and Division
Listing Method and Prime Factorization Method
6
Multiple Choice
Complete the prime factorization of 16.
2 x 2 x 2 x _
5
2
3
7
Multiple Choice
Find the LCM of 10 and 30.
40
20
30
8
Multiple Choice
What is the LCM of 21 and 14?
42
32
72
9
Multiple Choice
LCM of 18 and 14.
126
130
150
10
Find the LCM of the given numbers by LISTING MULTIPLES.
1) 3, 4
2) 8, 9
3) 12, 9
4) 15, 20
5) 4, 8, 12
Least Common Multiple (LCM)
6.PAR.6.2 Determine greatest common factors and least common multiples using a variety of strategies to make sense of applicable problems.
Example
Hotdogs come in a package of 8 and buns in a package of 12. How many packages of hot dogs and packages of buns would you need to purchase to have an equal number of hot dogs and buns?
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