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Least Common Multiple and Greatest Common Factor (LCM and GCF) Videos 4 videos

LCM & GCF
23650 Views

OMG you should totes watch this vid. LOL. It’s all about LCM and GCF… FTW. Least Common Multiple and Greatest Common Factor, here we come....

All You Need to Know about LCM & GCF
749 Views

This video covers Least Common Multiple and Greatest Common Factor. What are they? How do you find them? How does factorization play in?

CAHSEE Math 5.1 Number Sense
190 Views

Number Sense: Drill Set 5, Problem 1. Solve the equation.

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All You Need to Know about LCM & GCF 749 Views


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Description:

This video covers Least Common Multiple and Greatest Common Factor. What are they? How do you find them? How does factorization play in?


Transcript

00:00

Thank you We sneak l c m and g c

00:05

f allah shmoop What are these Mysterious acronyms Top secret

00:10

government organizations A new form of text speak or perhaps

00:14

a misplaced scrabble tiles Actually they're abbreviations for mathematical concepts

00:20

Well l c m is an acronym for least common

00:24

Multiple let's Take a look at that one first Not

00:27

so close Let's Back it up a bit boys Keep

00:29

he beep There there There we go Uh first we

00:33

need to talk about what a multiple is save Got

00:35

the number six multiple is any number that can result

00:38

from multiplying are given number by any other number For

00:41

example you gonna multiply six by one to get six

00:44

by to get twelve Buy three to get eighteen by

00:47

four to get twenty four and so on Six twelve

00:50

eighteen and twenty four are all multiples of six If

00:53

you want to find the multiples of eight you can

00:55

multiply eight by one to get ate by two to

00:58

get sixteen and buy three to get twenty four We

01:01

could keep going but we can see you're in a

01:03

hurry if you want to find the least common multiple

01:05

Of six and a you need to find the smallest

01:08

number that shares both numbers as factors as you can

01:11

see it's unfortunately not as easy as merely multiplying the

01:14

numbers together G c f or greatest common factor is

01:18

basically the reverse When looking for a g c f

01:21

you need to find the largest number that will divide

01:23

evenly into two other Numbers take the numbers 36 and

01:27

forty eight okay wiseguy put him back suppose you're given

01:30

the number of thirty six and forty eight what factors

01:33

that they have in common Well both Numbers are even

01:36

so 2 works three is also a factor as our

01:39

foreign six but the greatest common factor the granddaddy of

01:42

them all is twelve shmoop a good way to find

01:47

the gcs is to first use prime factory ization thirty

01:51

six breaks down into two times two times three times

01:54

three forty eight breaks down into two times two times

01:58

two times two times three the Numbers that the 2

02:02

have in common are the two twos and a three

02:05

multiply those out and voila twelve practice finding l c

02:10

m's and gcs on your own and it will pay

02:12

Dividends Just don't let the catch you Those guys are 00:02:15.828 --> [endTime] not to be trifled with

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