# Equivalent%20Fractions - PowerPoint PPT Presentation

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## Equivalent%20Fractions

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### Equivalent Fractions Raising and Reducing – PowerPoint PPT presentation

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Title: Equivalent%20Fractions

1
Equivalent Fractions
• Raising and Reducing

2
Pizza
3
Pizza
3/4
9/12
6/8
4
Multiply by 1
• 5 x 1
• 235 x 1
• 2/3 x 1
• a x 1

5
235
2/3
a
5
What is 1?

6
Rasing Fractions

7
Rasing Fractions
• A man walks into the pizza store and orders a
medium pizza.
• The clerk asks Would you like that cut in 8
pieces or 6?
• The man replied Make it 6. I dont think I
can eat 8.

8
Rasing Fractions
• To raise fractions make the denominator larger.
• Multiply numerator and denominator (top and
bottom) of the fraction by the same number.
• This is the same thing as multiplying by 1.

9
Rasing Fractions
• Multiply numerator and denominator (top and
bottom) of the fraction by the same number.
• This is the same thing as multiplying by 1.

10
Rasing Fractions
• Raise 3/8 to 56ths.
• Multiply numerator and denominator (top and
bottom) of the fraction by the same number.

11
Rasing Fractions
• Raise 3/8 to 56ths.
• Multiply numerator and denominator (top and
bottom) of the fraction by the same number.

12
Reducing Fractions
• Opposite of raising.
• Make the denominator smaller.
• Divide numerator and denominator by the same
number.

13
Reducing Fractions
• Might take more than one step.
• More than one way.
• Divide numerator and denominator by the same
number.

14
Reducing Fractions
• Divide numerator and denominator by the same
number.

15
Reducing Fractions
• Divide numerator and denominator by the same
number.

16
Proper and Improper
• An improper fraction has a numerator larger than
the denominator.
• A proper fration has a numerator smaller than the
denominator.

17
Mixed vs. Improper
• A mixed number has a whole and fraction part.
• A mixednumber can be written as an improper and
visa versa.

18
Work this on paper.
• We have 5 full crates of apples and one crate
with only7 apples. The full crates contain 30
apples.
• How many apples altogether?

19
Work this on paper.
• We have 5 full crates of apples and one crate
with only7 apples. The full crates contain 30
apples.
• How many apples altogether?
• 157 apples.
• How did you get the answer?

20
Mixed to Improper.
• You multiplied the 5 times 30 and added the 7
• To change a mixed number to improper, multiply
the denominator by the whole part and add the
numerator. Keep the denominator the same.

21
Mixed to improper
• Try some.

22
Mixed to improper
• Try some.

23
Try this on paper.
• We have 135 pencils and boxes that hold 12
each.
• How many full boxes? How many loose pencils?

24
Try this on paper.
• We have 135 pencils and boxes that hold 12
each.
• How many full boxes? 11 How many loose pencils?
3
• Divided 135 by 12. The remainder was the left
over.
• 135/12 11 3/12

25
Improper to Mixed
• Divide.

26
Try these.

27