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### Course: Staging content lifeboat>Unit 14

Lesson 34: Multiplying fractions and whole numbers

# Multiplying unit fractions and whole numbers

Learn how to multiply a whole number by a fraction, using both visual and computational methods. Multiplying 1/2 by 5 can be understood as adding five 1/2's together, resulting in 5/2. Created by Sal Khan.

## Want to join the conversation?

• If 1/2 x 5 is 5/2 does that mean 5 x 1/2 is the same?
• Yes. When you multiply a fraction or whole number, if the places are interchange, the answers are the same!
#Warning:This doesn't mean the application process is the same!!XD
• 5/6 × 4 is what
• The answer is 20/6, but it is not simplified. You should always simplify fractions if you can. 20/6 can be simplified to 10/3. since 10/3 is an improper fraction, we need to change it to a mixed number. 10 goes inside 3, 3 times and there is one left over. So the answer is 3 1/3. Sorry if this doesn't make sense, I'm only in fifth grade.
• The star (*) is just another way of saying your multiplying so x is also * just with a different shape. =)
• abdullah what are you doing
(1 vote)
• how would you multiply 3 1/4 x 6?
• Try converting 3 1/4 to an improper fraction, that should make it a lot easier
• What does it mean by find each product
• This could mean that there's more than 1 multiplication problem present in the question. Which, in this case, you have to find the products of the multiplication given. I hope this helps Eva Medina Whitley!
• how do you do mixed fractions * fractions
• For example ,if they ask you (5 1/2) right?than you just calculate it like this(2 times five,which is 10 ,after that,youplus 1 to 10.)I hope it will help ALIVIA S.
• when adding them together to get 5/2 why are the 1's added but yet the 2's stay as 2 and not 10?
• But I don’t understand? How do you know what fraction to multiply? Do you have divide? Or…
• Always remember this.. It should be repeated any time you are doing fractions. Every Single Class. Numerator is the top number on a fraction. Denominator is bottom number on a fraction. To multiply fractions just multiply the numerator by whatever you want to multiply the fraction by. It's the easiest and quickest way. Sal hinted at it at the end of the video but try this. 4x 1/6. the numerator is 1 (TOP Number) the number you want to multiply it by is 4 so 1x4 is 4. Now add that into the fraction as the new numerator, so the answer would be 4/6 :)