Fractions - zlomky

- 7. ROCNÍK ZÁKLADNÍ ŠKOLY

Fractions

We divide a whole into identical parts

The picture is cut into 9 identical parts

One ninth

Fractions

How many parts is the picture divided into?

quarters

quarters

Dividing into quarters means to divide something

into four identical parts.

Fractions

- A fraction is a part of a whole

Fractions

- One Half
- Draw it

- One Quarter
- Draw it

- The top number tells us how many parts you have

and the bottom number tells us how many parts the

whole was divided into

Expanding Fractions

Expanding a fraction by a number different from 0

means multiplying the numerator and also the

denominator by this number.

The value of the fraction is the same!

Equivalent fraction

We divided each part into 2 parts only.

Expanding Fractions

Expanding by the number 2 (dividing a sheet of

paper)

Expanding Fractions

Expand fractions by the number 4

Count on the interactive board

Expand fractions by the number 3

Expand fractions by the number 5

Cancelling Fractions

Cancelling a fraction means dividing the top

number (numerator) and the bottom number

(denominator) by the common factor.

The value of the fraction is the same!

Equivalent fraction

Cancelling Fractions

Cancel fractions by the number 4

Count on the interactive board

Cancel fractions by the number 3

Cancel fractions by the number 5

Try it yourself!