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.

Lesson 2: Multiplying fractions and whole numbers

# Multiplying fractions by whole numbers on a number line

We can multiply fractions by whole numbers on the number line. We multiply them by adding the fraction multiple times, just like we do with whole numbers.

## 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...
• i wiildo my best nottt
• 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
• why do you have to multiply upper one to upper one and the low one to low one
• 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?
• It may not seem useful now, but later on you will have algebraic expressions with uknown numbers (x, y, ...) in fractions and in some cases it will be very difficult to write such numbers as decimal values.
• wouldn't you just put the 2 over 1 and multiply
• Yeah! Thats what I was thinking!
(1 vote)
• Hi can you guys do this
• yes i can do it
(1 vote)
• Good teacher! Are you teaching online classes?!