Fraction Action

Fractions pizza

An introduction to fractions.

 

Click on Mrs. Webb to hear the text read aloud to you. Mr. Luhman will ask questions and have you  use your brain power throughout the book.


What is a Fraction?

Fractions are a small part or item forming a piece of a whole.

 

Example:

Let's break a hexagon into 6 equal  pieces.

What if we took one of the pieces? That would be 1 piece out of 6 pieces, right?

Below is an example of how you would write the fraction. We read this by saying "one sixth".

The top number is the numerator. The bottom number is the denominator.
An example of how a fraction is written.

A fraction has a numerator  and a denominator.

The numerator tells you how many of those pieces you have.

The denominator tells you how many total pieces there are.

Numerator

––––––––––

Denominator

Numerator and denominator
The numerator is the top number and the denominator is the bottom number.

Whole pizza
This pizza is divided into 8 equal pieces. All together it is one whole pizza.

Whole

  • All, everything, total amount
  • All of the parts

The pizza to the left is divided into 8 equal parts.

What fraction of the pizza has pepperoni on it?

If you said all of it, you are right!

8 pieces out of 8 total pieces have pepperoni. So the fraction would be..

             8

            ––       OR       1 whole pizza

             8

When the numerator and denominator are the same, it is the same as one whole, or 1.

 


Halves

An object divided into two equal parts has two halves.

 

The circle to the left is divided into halves.

The red portion of the circle is 1 of 2 halves, or one half. This is written as

1/2

 

Both the red and blue pieces together make 2 of 2 halves. This is written as

2/2

Two halves of a circle
This circle is divided into halves.

 Thirds

When an object is divided into three equal parts it is divided into thirds.

 

The circle below is divided into three equal parts.

If you took one piece of the circle, you would have 1/3 or one third.

With one piece gone, there are two pieces left. The remainder  of the circle is 2/3 or two thirds.

Circle divided into thirds.
This circle is divided into three equal parts.

Fourths

When an object is divided into four equal parts.

 

What fraction of the square is red?

It is 1/4 or one fourth.

The remainder of the square is green. What fraction of the square is green?

It is 3/4 or three fourths. 

Square divided into four parts
The square is divided into four equal parts.

Eighths

An object is divided into eighths when it has eight equal parts.

 

The circle below has eight pieces. What fraction of the circle is blue?

It is 3/8 or three eighths.

 

What fraction of the circle is white?

It is 5/8 or five eighths.

Circle divided into eight parts
This circle is divided into eight equal parts.

Congratulations!

You have completed learning about fractions. Use what you have learned to recognize what can be divided into fractions in your classroom.

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