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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.