The World of Fractions

When you’ve looked carefully all around,

You’ll be amazed at the fractions you’ve found!

Compiled by Mrs. Thonus

• A fraction is part of a whole. When you divide something into pieces each piece is called a fraction or a fractional part.

Fractions have 2 main parts.

The numerator is the top number. It tells how many parts we have. It answers the question “How many?”

3

4

numerator

We have 3 out of 4 slices of pizza.

Fractions have 2 main parts.

The denominator is the bottom number. It tells how many total parts there are.

3

4 denominator

There are 4 total slices of pizza.

The bar separating the numerator and the denominator is

called a fraction bar.

3

4

Fraction bar

One more vocabulary word…

• Unit fraction: a unit fraction is a fraction with 1 as a numerator. It represents 1 part of a whole.

When you name fractions you use ordinal numbers to say the

denominator.• 2 = half• 3 = third• 4 = fourth• 5= fifth• 6= sixth• 8 = eighth

Here are some more examples.

1/3 one-third 1/5 one-fifth

5/5 five-fifthsor one whole

5/8 five-eighths

3/8 three-eighths

Click on Annie and Moby to learn more about fractions.

Fractions are in the world all around us.

:Let’s Review Fractions today by watching another Annie and

Moby video.