If you're seeing this message, it means we're having trouble loading external resources on our website.

If you're behind a web filter, please make sure that the domains *.kastatic.org and *.kasandbox.org are unblocked.

# Multiplying fractions by whole numbers on a number line

Sal multipiies fractions by whole numbers using the number line.

## Want to join the conversation?

• Why does he make the question 5x1/3 so complex when all you have to do is do 1x5=5 and add the 3?
• "All you have to do" shows that the problem is already intuitive for you to solve. For those where the problem is not yet intuitive to solve, it needs to be explained why the solution works.

Someone is eventually going to ask you "Why do I have to do 1x5 and why is 1x5=5?" and you have to be able to explain that in a clear manner.
• what if the number is big this is hard! Help Me...
• so you know that 3 = 3/1 right. so if 10 = 10/1 and you had a problem that said 10 x 5/10 it would = 10/1 x 5/10 10 x 5 = 50 and 1 x 10 = 10 so it would be 50/10 or 5. pls, vote me up!
• Is this hard for you guys?
• LOL no
• Can I get likes for a badge?
• Why do we have to mutiply fraction?
• because u need it in life even tho u really want need it unless you want to be something
• Yes, I understand this, but why would we want to multiply fractions? We could convert them into decimals and easily solve them. So why multiplying fractions?