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FRACTIONS

What is a fraction? How to calculate it.
by

Leyan Saleh

on 1 April 2014

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Transcript of FRACTIONS

F
R
A
C
T
I
O
N
S
!

What is a FRACTION?
How to calculate it?


Fraction Terms
How to Calculate

Proper Fractions
Mixed Fraction
Now The Opposite
What is a Fraction?
Fractions are a

part of a whole

or more generally,
any number of equal parts
.

Fractions are not a whole number
Fractions consist of two numbers on top of each other separated by a
fraction bar
or the fancy word

vinculum
The number on the
top
is called the numerator.
- A numerator is the
number of parts
you have or you are working with
The number on the
bottom
is called the denominator.
- A denominator is the
total number of parts or pieces
Numerator
Denominator
Numerator
Denominator
Fraction Bar
An easy way to always remember the difference between numerator and denominator is that
n
u
merators are
n
ever
u
nder
and
d
enominators are
d
own


TIPs and TRICKs
Now we have to learn how to calculate fractions.
When calculating a fraction you are looking at a few things:

1. The number of
shaded parts
there is
2. The number of
parts in total including the shaded parts

You then put the

3. The number of
shaded parts
as the
numerator

4. The number of
total parts
as the
denominator

FUN

FUN

FUN
Lets do some exercise and see if you all understand these terms. This will be fun!
So this is how it goes...
When I say
FRACTION BAR
you will
stand up and open your arms wide, making a straight line

When I say
NUMERATOR
you will
jump high
When I say
DENOMINATOR
you will
crouch down
Who ever is slow or does the wrong move is out!
GET UP !
Lets Try It Out
Why Are Fractions Important?
Now imagine your parents came home with some good goodies but they tell you to
share
it amongst your siblings!
You want to make sure you are cutting
equal pieces
so that no one is getting a
bigger portion
!

This is where
FRACTIONS
are really important!
Equivalent Fractions
Fractions may
look
different but really still
mean
the same thing.
These are called
equivalent fractions.

They are

equal
For example
1/2
and
2/4
are the same thing. They just have different
denominators
.
These fractions all have different numbers but they all show half the pizza. That is why they are

EQUIVALENT FRACTION
A mixed fraction is a
whole
number (2) and a
proper fraction
(1/3)
combined
. So it would look like this ...
OR
Whole Number
Improper Fraction
Improper fractions are when the
denominator
is
larger
than the
numerator
.
When you see a fraction like that (
9/5
) you will want to change it into a
mixed fraction
.

Lets change a
mixed fraction
to a
proper fraction
. Its really easy to do this. Just the opposite of what we just did.

So change the 2 1/4 into a
improper fraction
Try this online game of matching the fractions
http://pbskids.org/cyberchase/math-games/melvins-make-match/
In Justin's song
Common Denominator
he says, "JUST A FRACTION OF YOUR LOVE, FILLS THE AIR"
What do you think Justin means with the word

FRACTION?
Three Types of Fractions
- Proper Fraction
- Improper Fraction
- Mixed Fraction
Proper Fraction
When the
numerator
is
less
than the
denominator
This means that there are 3 pieces out of 5.
How many parts are green?
How many parts are there in total?
What is the fraction?
How?
1. What is the
denominator
2. What is the
numerator
3. How many of the
numerator
are there in the
denominator
?
4. What is remaining from the
numerator
?
9

-
5

=

4
So how does the fraction look like now?
How?
1. How many whole numbers are there?
2. What is the denominator?

This means that the whole number has that many pieces.
Equivalent Fractions
Online Game
Group FUN
1. Make a group of 3
2. Grab a piece of paper
3. Draw 3 different fractions but they must be equivalent
OR
On a small piece of paper can you please write one thing you learned today. It could be something you enjoyed doing. Or something that was not fun. Or you could even draw a smiley face if you loved what you learned.
Leyan Saleh
T
H
A
N
K
Y
O
U
!
in the
There is 1
3. Count the total pieces of the wholes
5. Make the new fraction
6. The denominator stays the same
2
4
4. Add the pieces from the whole to the numerator
= 8 pieces
8

+

1
=

9
Try this:
1. How many whole pizzas are there?
3
2. What is the fraction of the pizza that is missing some slices?
What is the mixed fraction?
3
Full transcript