G4 7.2 fractions as operators Lesson Slides: 13 Slides

13 Slides • 13 Questions

1

Fractions as Operators

2

Poll

Have you ever heard the word operators?

YES

NO

3

Poll

How about Unit Fraction?

YES

NO

4

What we are going to learn today?

Describe a unit fraction as a fraction with a numerator of 1
Use a unit fraction as an operator, for example, find one-fifth of a quantity by dividing by 5 and find one-sixth of a quantity by dividing by 6.

5

Operators

6

Unit Fractions

7

Multiple Choice

When you use fraction as operator. The fractions will act like ....

1

Addition

2

Subtraction

3

Division

4

Multiplication

8

Multiple Select

Which of the following fractions is NOT an example of unit fractions?

(you can choose more than one answer)

1

$\frac{1}{4}$

2

$\frac{2}{3}$

3

$\frac{1}{7}$

4

$\frac{6}{9}$

9

Poll

Now, do you know what does unit fraction and operators mean?

YES

NO

10

11

Multiple Choice

How much butter needed if I want to make only 8 gingerbread?

1

20 g

2

80 g

3

10 g

4

40 g

12

How can you find one-third of a quantity?

13

How can you find one-third of a quantity?

Divide the number of the ball by 3

14

How many minutes are in one-third of an hour?

15

How many minutes are in one-third of an hour?

20 minutes

16

Can you answer the questions about fractions as operator now?

17

Poll

Are you ready?

YES

NO

18

Fill in the Blanks

What is $\frac{1}{3}$ of $12?

19

Fill in the Blanks

What is one-tenth of 30?

20

Fill in the Blanks

What is $\frac{1}{5}$ of 45?

21

Fill in the Blanks

What is one-quarter of 40?

22

Draw

Complete these diagrams to find fractions of amounts of money.

23

Poll

Which would you rather have: $\frac{1}{2}$ of $15 or $\frac{1}{4}$ of $40?

$\frac{1}{2}$ of $15

$\frac{1}{4}$ of $40

24

Do you have any questions?

25

Be ready because tomorrow we are going to have some exercises on this topic and please study more at home!

26

Thank you!

Fractions as Operators

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