If you remember, a fraction is a
part of a whole.
It can be many objects like 2 cookies out of
4 total cookies, or one object, like 1 slice of pizza from a pizza
with 16 slices.
As with all fractions, the
objects have to be divided into parts of equal size.

1
4 
One
fourth is yellow. 

2
4 
Two
fourths are yellow. One half is
yellow. 

3
4 
Three
fourths are yellow. 

4
4 
Four
fourths are yellow. One whole is
yellow. 
In this picture we learn how to divide into fourths.
First
you must divide an object into 4 equal parts. When you write a
fraction, you show on the bottom how many parts in the whole there are. On the
top of a fraction you write how many of the parts you have selected out of the whole.
3
←
Part (Numerator)
4 ←
Whole
(Denominator)
The number on the top of a
fraction is also called the numerator.
The number on the
bottom is called the denominator.
When we name a fraction we
use the numerator's normal name and the denominator's ordinal name (third,
fourth, fifth. . . )
Let's work with the fraction
one half or :
1
2
That
means 1 part out of 2 total parts. Remember, that to have one
half the two parts must be equal in size.
Let's try
these problems. Point to each shape that shows two equal parts:
1. 


2. 


3. 


4. 


5. 


6. 


7. 


8. 


9. 


10. 


11. 


12. 


13. 


14. 



The next time you eat a
piece of pizza, count how many total pieces of the pizza
there are.
What fraction did you just eat?


How many
times can you fold a piece of paper in half? Most people
can't fold a piece of paper in half more than 8 times.
However,
in January of 2002, while a junior in high school, Britney
Gallivan demonstrated that a single piece of paper can be
folded in half twelve times. Try it! How many times can you
fold a piece of paper in half? 

How many examples of fractions
can you find around your house?
Think
about cutting an apple into slices, dividing up a candy bar, or
filling a glass half full with orange juice. These are all
ways fractions can be seen in everyday life.
Try to
think of at least 5 more ways you see fractions in your home.

