Multiplying Fractions

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# Multiplying Fractions - PowerPoint PPT Presentation

Multiplying Fractions. Goals: I can figure out how to solve multiplication problems with fractions in real-world situations.

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### Multiplying Fractions

Goals:I can figure out how to solve multiplication problems with fractions in real-world situations.

Standard:MCC5.NF.6: Solve real world problems involving multiplication of fractions and mixed numbers, e.g., by using visual fraction models or equations to represent the problem.

Credits:Special thanks to Kelly Katz, for some of the slides in this presentation.

Butterfly Method

1

1

_5_

12

• _6_
• 10

2

2

Butterfly Method

1

1

_5_

12

• _6_
• 10
• 1
• 4

=

2

2

Butterfly Method

1

1

_4_

6

• _3_
• 4

2

1

Butterfly Method

1

1

_4_

6

• _3_
• 4
• 1
• 2

=

2

1

Butterfly Method

5

1

20

8

_4_

4

2

1

Butterfly Method

5

1

20 8

4_

4

5

2

=

2

1

What is wrong with this answer?

52

Which type of fraction is it?

Proper Fraction

Improper Fraction

Improper Fraction → Mixed Number
• Divide the numerator by the denominator
• Put the remainder over the denominator

Write the

remainder

over the

denominator

2

Divide the

numerator by

the denominator

• R 1

2

• 5
• 2

4

• 1
• 5
• 1

2

=

2

2

Convert the improper fraction to a mixed number:

If there is no remainder then your answer is a whole number!

• 10
• 2

5

Name:__________________Date:____________________Group:_____

I can: demonstrate my knowledge of multiplying fractions!

Multiply these fractions (using butterfly method)!

• 5 x 4 = 2. 3 * 7 =

8 10 6 9

Multiply (using butterfly method) these fractions and turn your answers into mixed numbers! Don’t forget to simplify!

• 3. 2 x 18 = 4.8 x 27 = 5. 12 x 4 =

3 10 9 2 3

Simplify these Fractions!

6.12 = 7. 6 =

24 18

• 8. Cody has 27 marbles. Five-Ninths of the marbles are purple. How many marbles are purple?_______ are purple
• 9. How many are not purple? _______ are not purple