After all the videos I still don't understand.Please make it more clear

i will show you how to do it. example: 2/5 x 7/9. multiply the numerators and denominators, like this: 2x7=14, and 5x9=45. so the answer is 14/45

Could you show me how it is done

1. Convert a mixed fraction to an improper fraction. 2. Multiply the numerator by each other, and this is the answer's numerator. 3. Multiply the denominator by each other, and this is the answer's denominator. 4. Simplify the fraction by dividing the result's numerator and denominator by their GCD. For example, (7 / 2) * (15 / 7) Numerator multiplied: 7 * 15 = 105 Denominator multiplied: 2 * 7 = 14 Our resultant fraction: 105 / 14 GCD of 105 and 14 is 7, so we divide numerator and denominator by 7. (105 / 7) / (14 / 7) = 15 / 2

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Course: 5th grade > Unit 6

Lesson 6: Multiplying fractions word problems

Multiply fractions: FAQ

Google Classroom

Frequently asked questions about multiplying fractions.

How do we multiply fractions and whole numbers visually?

There are many different ways to multiply fractions visually. We can use area models, groups of objects, tape diagrams, or number lines. All of these methods help us to see how the multiplication works.

For example, we can use a number line to show how we multiply

\frac{4}{5} \times 10

by drawing a number line from

0

10

and then splitting the number line into

5

equal parts.

Next, we can find

\frac{4}{5}

10

on the number line by counting

4

lengths of

2

So,

\frac{4}{5} \times 10 = 8

Try it yourself with these exercises:

What are the strategies we can use to multiply fractions by fractions?

Just like multiplying fractions and whole numbers, we can use different visuals to help us multiply fractions. Some popular strategies are using area models, tape diagrams, or number lines.

We can use an area model to multiply

\frac{3}{10} \times \frac{1}{4}

. First, we can create a striped rectangle by multiplying its

width \times height

The striped rectangle would show

\frac{3}{10}

of a unit wide and

\frac{1}{4}

of a unit high. The amount overlapping would be our product. In this example, the product is

\frac{3}{40}

Try it yourself with these exercises:

How do we multiply mixed numbers?

To multiply mixed numbers, we can convert them to improper fractions and then multiply the fractions as we normally would. For example, to multiply

1 \frac{1}{2}

2 \frac{1}{4}

, we first convert them to improper fractions:

\frac{3}{2} \times \frac{9}{4}

. Then, we multiply the numerators and denominators:

\frac{27}{8}

Try it yourself with this exercise:

Multiply mixed numbers

How do we find the area of rectangles with fraction side lengths?

To find the area of any rectangle, we can multiply the length times the width. If the rectangle has fractional side lengths, we multiply the two fractions together.

For example, to find the area of a rectangle with side lengths

\frac{1}{2}

and

\frac{2}{3}

, we multiply

\frac{1}{2} \times \frac{2}{3} = \frac{2}{6} = \frac{1}{3}

Try it yourself with this exercise:

Area of rectangles with fraction side lengths

Why do we need to learn how to multiply fractions?

Multiplying fractions is a key skill in math that you'll use throughout your academic career and in the real world. For example, if you need to scale a recipe up or down, you might need to multiply fractions in order to adjust the quantities of the ingredients.

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penelope
Posted 2 months ago. Direct link to penelope's post “After all the videos I st...”
After all the videos I still don't understand.Please make it more clear
Button navigates to signup pageComment on penelope's post “After all the videos I st...”
(4 votes)
Answer
- surajdharan.sr71
  Posted 16 days ago. Direct link to surajdharan.sr71's post “i will show you how to do...”
  i will show you how to do it. example: 2/5 x 7/9. multiply the numerators and denominators, like this: 2x7=14, and 5x9=45. so the answer is 14/45
  Button navigates to signup page
  (2 votes)
Satya SreehaasM
Posted 24 days ago. Direct link to Satya SreehaasM's post “Could you show me how it ...”
Could you show me how it is done
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(2 votes)
Answer
- joshua
  Posted 24 days ago. Direct link to joshua's post “1. Convert a mixed fracti...”
  1. Convert a mixed fraction to an improper fraction.
  
  2. Multiply the numerator by each other, and this is the answer's numerator.
  
  3. Multiply the denominator by each other, and this is the answer's denominator.
  
  4. Simplify the fraction by dividing the result's numerator and denominator by their GCD.
  
  For example, (7 / 2) * (15 / 7)
  
  Numerator multiplied:
  7 * 15 = 105
  
  Denominator multiplied:
  2 * 7 = 14
  
  Our resultant fraction: 105 / 14
  
  GCD of 105 and 14 is 7, so we divide numerator and denominator by 7.
  (105 / 7) / (14 / 7)
  = 15 / 2
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  (2 votes)
fundrip
Posted 3 months ago. Direct link to fundrip's post “how do I do 1 1/4 x 2/5”
how do I do 1 1/4 x 2/5
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(2 votes)
Answer
- Coopawo
  Posted 3 months ago. Direct link to Coopawo's post “take the 1 whole and turn...”
  take the 1 whole and turn it into 4/4 then multiply 5 x 2 and you get 10 then multiply 4 x 5 and you get 20 now you have 10 and 20 so simplify and you get 1/2
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  (1 vote)
rtbenham
Posted 6 months ago. Direct link to rtbenham's post “Basically your multiplyin...”
Basically your multiplying the fractions instead of dividing?
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(2 votes)
Answer
- Splatowan
  Posted 2 months ago. Direct link to Splatowan's post “Yes, it wants you to divi...”
  Yes, it wants you to divide, but it's multiplying, Kinda. It's confusing at the start.
  Comment on Splatowan's post “Yes, it wants you to divi...”
  (1 vote)
Slurp juice
Posted 3 months ago. Direct link to Slurp juice's post “7 divided by 21 equals 3?”
7 divided by 21 equals 3?
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(1 vote)
Answer
- Ian Pulizzotto
  Posted 3 months ago. Direct link to Ian Pulizzotto's post “No. The order of divisio...”
  No. The order of division is important. While it is true that 21 divided by 7 is 3, 7 divided by 21 is the fraction 7/21, which reduces to 1/3.
  
  Think about this: if 7 pizzas are equally divided among 21 people, each person would get less than a whole pizza because the number of pizzas (7) is less than the number of people sharing them (21). Clearly each person would not get 3 whole pizzas.
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  (1 vote)
Aanya
Posted 3 hours ago. Direct link to Aanya's post “HI PPL! how do u not do t...”
HI PPL! how do u not do this?
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(1 vote)
Answer
CHEZARET
Posted a year ago. Direct link to CHEZARET's post “How do you figure out the...”
How do you figure out the square roots of questions?
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Boba Kitty🐈🧋
Posted a year ago. Direct link to Boba Kitty🐈🧋's post “What does FAQ stand for?”
What does FAQ stand for?
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- Harriet
  Posted a year ago. Direct link to Harriet's post “frequently asked question...”
  frequently asked questions
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Emperor Shine Granite I
Posted a year ago. Direct link to Emperor Shine Granite I's post “How do you multiply a fra...”
How do you multiply a fraction by a mixed number by a whole number?
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Answer
- Bigbrainblob
  Posted a year ago. Direct link to Bigbrainblob's post “To multiply a fraction by...”
  To multiply a fraction by a mixed number, convert the mixed number to an improper fraction and then multiply both numerator and denominator. Then to multiply by a whole number, you need to only multiply the numerator by the whole number. Then simplify if needed.
  Comment on Bigbrainblob's post “To multiply a fraction by...”
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