I think the easiest way is to write down the multiples and then find it.

Why do they put the older comments in the top and also there all kind of old.

This is very easy for me but others who dont get it should watch the video and take down the notes because that is how it helped me. For sure theyre gonna get it next time!

Tru,or, you can go on mathantics when you don't understand something

so this is kinda hard idk how to actually figure it out without looking it up....

fr it is so hard but if u look it up it make it easier bc u kno the answers and thats wht i like....

Main content

6th grade (Eureka Math/EngageNY)

Course: 6th grade (Eureka Math/EngageNY) > Unit 2

Lesson 4: Topic D: Number theory—thinking logically about multiplicative arithmetic

Least common multiple review

CCSS.Math:

6.NS.B.4

Google Classroom

Review least common multiples (LCM) and try some practice problems.

What is LCM?

LCM stands for least common multiple. The least common multiple of two numbers is the smallest number that is a multiple of both of them.

Finding least common multiple

One way to find the LCM of two (or more!) numbers is to list the multiples of each number until we find the smallest multiple they have in common.

Want to learn more about least common multiples? Check out this video.

Example 1: LCM of 8 and 10

Multiples of 8: 8, comma, 16, comma, 24, comma, 32, comma, start color #11accd, 40, end color #11accd, comma, 48, comma, 56, comma, 64, comma, 72, comma, start color #11accd, 80, end color #11accd, point, point, point

Multiples of 10: 10, comma, 20, comma, 30, comma, start color #11accd, 40, end color #11accd, comma, 50, comma, 60, comma, 70, comma, start color #11accd, 80, end color #11accd, comma, 90, comma, 100, point, point, point

start color #11accd, 40, end color #11accd and start color #11accd, 80, end color #11accd are common multiples of 8 and 10. Which of these is the least?

start color #11accd, 40, end color #11accd is the smallest multiple that 8 and 10 have in common.

start text, l, c, m, end text, left parenthesis, 8, comma, 10, right parenthesis, equals, 40

Example 2: LCM of 3, comma, 4, comma and 6

Multiples of 3: 3, comma, 6, comma, 9, comma, start color #11accd, 12, end color #11accd, comma, 15, comma, 18, comma, 21, comma, start color #11accd, 24, end color #11accd, point, point, point

Multiples of 4: 4, comma, 8, comma, start color #11accd, 12, end color #11accd, comma, 16, comma, 20, comma, start color #11accd, 24, end color #11accd, comma, 28, point, point, point

Multiples of 6: 6, comma, start color #11accd, 12, end color #11accd, comma, 18, comma, start color #11accd, 24, end color #11accd, comma, 30, comma, 36, point, point, point

start color #11accd, 12, end color #11accd is the smallest multiple that 3, comma, 4, comma and 6 have in common.

start text, l, c, m, end text, left parenthesis, 3, comma, 4, comma, 6, right parenthesis, equals, 12

Practice

Problem 1

Current

What is the least common multiple of 3 and 9?

Another way to say this is:

start text, l, c, m, end text, left parenthesis, 3, comma, 9, right parenthesis, equals, question mark

Want to try more problems like this? Check out this exercise.

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simrahquazi42
Posted 5 years ago. Direct link to simrahquazi42's post “I think the easiest way i...”
I think the easiest way is to write down the multiples and then find it.
Button navigates to signup pageComment on simrahquazi42's post “I think the easiest way i...”
(49 votes)
Answer
- DannaS
  Posted 2 years ago. Direct link to DannaS's post “Why do they put the older...”
  Why do they put the older comments in the top and also there all kind of old.
  Button navigates to signup page
  (3 votes)
Cristela Bonilla
Posted 6 years ago. Direct link to Cristela Bonilla's post “This is very easy for me ...”
This is very easy for me but others who dont get it should watch the video and take down the notes because that is how it helped me. For sure theyre gonna get it next time!
Button navigates to signup pageComment on Cristela Bonilla's post “This is very easy for me ...”
(30 votes)
Answer
- hgnairne11
  Posted 2 years ago. Direct link to hgnairne11's post “Tru,or, you can go on mat...”
  Tru,or, you can go on mathantics when you don't understand something
  Comment on hgnairne11's post “Tru,or, you can go on mat...”
  (21 votes)
2023bbailey
Posted 2 years ago. Direct link to 2023bbailey's post “I get it i'm just need a ...”
I get it i'm just need a little more work that's all.
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(27 votes)
Answer
hgnairne11
Posted 2 years ago. Direct link to hgnairne11's post “When i finished the whole...”
When i finished the whole thing for l.c.m i played: i feel good and danced!
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(20 votes)
Answer
Trixie23
Posted 6 years ago. Direct link to Trixie23's post “how one question make som...”
how one question make some more question please.
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(15 votes)
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meleenah153
Posted 2 years ago. Direct link to meleenah153's post “so this is kinda hard idk...”
so this is kinda hard idk how to actually figure it out without looking it up....
Button navigates to signup pageComment on meleenah153's post “so this is kinda hard idk...”
(10 votes)
Answer
- NyasiaBrown
  Posted a year ago. Direct link to NyasiaBrown's post “fr it is so hard but if u...”
  fr it is so hard but if u look it up it make it easier bc u kno the answers and thats wht i like....
  Button navigates to signup page
  (3 votes)
aaron richards
Posted 4 years ago. Direct link to aaron richards's post “what is the LCM of 8,10,a...”
what is the LCM of 8,10,and 23
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(8 votes)
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- try_2_learn
  Posted a year ago. Direct link to try_2_learn's post “the lcm for that is 300”
  the lcm for that is 300
  Comment on try_2_learn's post “the lcm for that is 300”
  (3 votes)
27eembleton
Posted 2 years ago. Direct link to 27eembleton's post “i did not have to watch t...”
i did not have to watch the video but the people that may have to here is a little tip......... it is just skip counting intill the 2 or more numbers you have finaly have the same number the first one you find will be the least
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(6 votes)
Answer
madigdingus
Posted a year ago. Direct link to madigdingus's post “Is there another way to f...”
Is there another way to find the gcf?
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(5 votes)
Answer
- jeffS
  Posted 3 months ago. Direct link to jeffS's post “You can use the ladder me...”
  You can use the ladder method.
  Button navigates to signup page
  (1 vote)
savstrother.homeschool
Posted 2 years ago. Direct link to savstrother.homeschool's post “As a person who has alway...”
As a person who has always struggled in math, I must say that I enjoy finding the Least Common Multiple of number pairs and groups!
Button navigates to signup pageComment on savstrother.homeschool's post “As a person who has alway...”
(2 votes)
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