Introduction to Fractions

1. Fractions
A fraction is a number that
names an equal part of a
whole.

2. Vocabulary
• fraction
• numerator
• denominator
• equivalent fraction

3. The denominator is the
number below the bar in a
fraction. It tells the total
number of equal parts.
The numerator is the
number above the bar in a
fraction. It tells how many of
the equal parts of the whole
or group are being
considered.
34three-fourths

4. Shaded parts
Equal parts
in a whole
3
5
1 part shaded
1
2
2 equal parts
3 parts shaded
5 equal parts

5. 58
= five-eighths

6. What is the numerator in the following fractions?
4 5 2 1 6 3
8 10 5 3 9 5
What is the denominator in these fractions?

7. Jose has three pencils. He
sharpened one pencil. What
fraction represents the sharpened
part of the group?
How many are in the whole or group? (denominator)
13
How many are in the part we are talking about? (numerator)

8. Equivalent Fractions
1
1/2 1/2
1/3 1/3 1/3
1/4 1/4 1/4 1/4
1/5 1/5 1/5 1/5 1/5
1/6 1/6 1/6 1/6 1/6 1/6
1/8 1/8 1/8 1/8 1/8 1/8 1/8 1/8
1/9 1/9 1/9 1/9 1/9 1/9 1/9 1/9 1/9
1/10 1/10 1/10 1/10 1/10 1/10 1/10 1/10 1/10 1/10
1/12 1/12 1/12 1/12 1/12 1/12 1/12 1/12 1/12 1/12 1/12 1/12
Whole
Halves
Thirds
Fourths
Fifths
Sixths
Eighths
Ninths
Tenths
Twelfths