answersLogoWhite

0

State the numbers you want to compare as a product of their prime factors. Example: 30 and 42

2 x 3 x 5 = 30

2 x 3 x 7 = 42

The GCF is the numbers they have in common, in this case 2 X 3. The GCF is 6.

The LCM is all the numbers, getting rid of duplicates, in this case 2 x 3 x 5 x 7. The LCM is 210. If one of the numbers you want to compare is prime, the GCF is usually one and the LCM is usually the two numbers multiplied together.

User Avatar

Wiki User

13y ago

Still curious? Ask our experts.

Chat with our AI personalities

DevinDevin
I've poured enough drinks to know that people don't always want advice—they just want to talk.
Chat with Devin
BlakeBlake
As your older brother, I've been where you are—maybe not exactly, but close enough.
Chat with Blake
SteveSteve
Knowledge is a journey, you know? We'll get there.
Chat with Steve

Add your answer:

Earn +20 pts
Q: How do you calculate the LCM and GCF?
Write your answer...
Submit
Still have questions?
magnify glass
imp