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Chapter 7 Multiply FractionsPowerPoint Presentation

Chapter 7 Multiply Fractions

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Multiply Fractions

To find a fractional part of a group:

Denominator tells how many equal groups

Numerator tells how many equal groups to circle

“of” means to multiply

or

2

3

2

3

18 =

18 =

of

X

Use your clicker to answer the following question:

Martin is planting a vegetable garden. Each row

is two meters long. He wants to plant carrots

along ¾ of each row. How many meters of each

row will he plant with carrots?

3

4

2 =

x

Margo was helping clean up after a class party.

There were 3 boxes. Remaining with pizza in them.

Each box had 3/8 of a pizza left. How much pizza

was left in all?

3

8

3

x

=

Use your clicker to answer the following question:

1. Write the whole number

as a fraction

3 X

56

2. Multiply the numerators

3. Multiply the denominators

4. Write the product as a mixed number.

Then simplify

Use a model to solve

Use your clicker to answer the following question:

Use your clicker to answer the following question:

There is 5/8 of a pizza left. Josh eats ¼ of the left over pizza.

How much pizza does Josh eat?

Describe how to solve the problem using a model.

Include a picture of your model

2

2

5

3

4

3

8

3

7

1

3

=

=

=

X

X

X

The product of a fraction and another fraction

will be less then either fraction

5

6

2

=

x

5

6

3 =

x

The product of a number greater than 1 and a fraction will be

greater than the fraction and less than the whole number.

Use your clicker to answer the following question:

Explain how you can compare the size of a product to the size

of a factor when multiplying fractions, without actually doing

the multiplication. Include an example.

Use your clicker to answer the following question:

Area: the number of square units needed to

cover a surface. L X W = A

Use your clicker to answer the following question:

A fraction times a mixed number, the product will be less than the mixed number.

X

X

4

1

1

13

34

14

23

25

3

2

A whole number (greater than one) times a mixed number,

the product will be greater than the mixed number.

X

A mixed number times a mixed number, the product will be

greater than both factors.

X than the mixed number.

X

2

1

1

1

3

1

34

14

12

15

12

13

78

18

12

14

6

3

2

3

X

X

X

X

18

13

14

15

14

34

1

2

3

1

2

3

Is the product ____________

Is the product ____________

Is the product ____________

Is the product ____________

Is the product ____________

Is the product ____________

Test Prep Lesson 7-8 than the mixed number.

Use your clicker to answer the following question:

Lesson 7-9: Multiply Mixed Numbers than the mixed number.

Date

Another than the mixed number. Way:

Change to improper fraction

One Way:

Use a Model

X

X

13

13

=

=

14

1

14

1

Multiply using the Distributive than the mixed number.Property.

X

X

X

X

12

56

3

2

12

14

4

2

45

34

8 =

10 =

=

=

Test Prep Lesson 7-9 than the mixed number.

Use your clicker to answer the following question:

Test Prep Lesson 7-10 than the mixed number.

Use your clicker to answer the following question:

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