Fractions - zlomky

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Fractions - zlomky

• 7. ROCNÍK ZÁKLADNÍ ŠKOLY

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Fractions
We divide a whole into identical parts
The picture is cut into 9 identical parts
One ninth
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Fractions
How many parts is the picture divided into?
quarters
quarters
Dividing into quarters means to divide something
into four identical parts.
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Fractions

• A fraction is a part of a whole

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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

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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.
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Expanding Fractions
Expanding by the number 2 (dividing a sheet of
paper)
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Expanding Fractions
Expand fractions by the number 4
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Count on the interactive board
Expand fractions by the number 3
Expand fractions by the number 5
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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
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Cancelling Fractions
Cancel fractions by the number 4
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Count on the interactive board
Cancel fractions by the number 3
Cancel fractions by the number 5
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Try it yourself!