Loading presentation...

Present Remotely

Send the link below via email or IM

Copy

Present to your audience

Start remote presentation

  • Invited audience members will follow you as you navigate and present
  • People invited to a presentation do not need a Prezi account
  • This link expires 10 minutes after you close the presentation
  • A maximum of 30 users can follow your presentation
  • Learn more about this feature in our knowledge base article

Do you really want to delete this prezi?

Neither you, nor the coeditors you shared it with will be able to recover it again.

DeleteCancel

Make your likes visible on Facebook?

Connect your Facebook account to Prezi and let your likes appear on your timeline.
You can change this under Settings & Account at any time.

No, thanks

Multiplying Fractions

No description
by

Lauren King

on 30 October 2014

Comments (0)

Please log in to add your comment.

Report abuse

Transcript of Multiplying Fractions

Now You Know How to Multiply Fractions! Thank You!
Let's Get Started
Multiplying Fractions by a Whole Number
Any whole number is equivalent to a fraction with that whole number over 1; for example:
Multiplying Proper Fractions
There are three easy steps to multiplying fractions:


Multiplying Mixed & Improper Fractions
Questions to Try Yourself
Fractions Game
Multiplying Fractions
4 =
4
1
So when you multiply a fraction by a whole number this:
It is the same as this:
To get the product, multiply the denominators together and the numerators together:
4 x
3
9
4
1
3
9
x
Then, reduce your product to lowest terms. To reduce, see if there is a common factor between the numerator and denominator:
4
1
3
9
x
=
12
9
And if asked, turn it into a mixed fraction - if the numerator is greater than the denominator by dividing the top by the
bottom:
12
9
÷ 3
÷ 3
=
4
3
4
3
1 R 1
1
4
3
=
3
1
Great Resources
Fraction Practice:
http://www.thegreatmartinicompany.com/fractions/fraction-problems-home.html

http://www.mathsisfun.com/fractions_multiplication.html
Mr. Duey's Fractions
Fraction Jackson
2
3
x
1
2
Step 1: Multiply the numerators (numbers on top of the line) of the fractions to get a product
=
2
Step 2: Multiple the denominators (numbers below the line) of the fractions to get a product
2
3
x
1
2
=
2
6
Step 3: Reduce fraction by dividing by the numerator and denominator's lowest common denominator
2
6
÷
2
÷
2
=
1
3
6
10
3
5
1.
2.
12
4
x
x
3
5
3.
5
x
5
13
=
=
=
18
50
=
9
25
60
12
=
5
25
13
4.
15
5
x
2
=
=
5.
8
3
x
7
8
=
56
24
=
7
3
6.
6
2
x
11
4
=
66
8
30
5
6
=
33
4
An improper fraction is a fraction in which the numerator is larger than the denominator; such as:
12
8
A mixed number is comprised of a whole number and a fraction. To get a mixed number from an improper fraction, divide the numerator by the denominator:
12 ÷ 8 = 1
4
8
x
6
Multiplying improper fractions is just the same as multiplying proper fractions:

3
4
13
You can also reduce a mixed number:
4
1
4
8
x
8
÷4
÷4
10
=
1
1
2
=
12
8
x
5
4
=
60
32
To multiply mixed numbers together, turn the mixed numbers into improper fractions first, then multiply!
3
15
2
x
4
9
x
12
=
21
7
x
4
x
3
2
3
=
5
6
Challenge Question
NO CALCULATORS PLEASE :)

Bob has of a package. Mary has of Bob's. Fred has

of of Mary's. Greg has 3 times as much as Fred.

Nancy has the amount of Greg. If Nancy has 91 grams,

how many grams does Bob have?
351
20
44
1
2
x
1
6
5
12
14
=
82
7
6
9
x
3
4
6
x
2
3
=
44
27
1
4
x
2
6
x
2
=
1
6
4
5
3
8
2
9
1
2
7
15
or
17
11
20
Proper Fraction
or
11
5
numerator is less than the denominator
7
or
1
17
27
Improper Fraction
numerator is greater than or equal to denominator
Mixed Number
whole number and a fraction
To turn a mixed number to an improper fraction, multiply the denominator by the whole number then add the current numerator to get the new numerator:
1
4
8
x
+
(8x1) + 4 = 8 + 4 = 12
Full transcript