Elk Grove Elementary

Lesson on Fractions

When Do We Use Fractions?

• We can use it when we eat pizza!

• When we are looking at a number of something out of a whole.

• What are some examples?...

What does a Fraction Look Like?

• Which one is the fraction??

• There are several names for a number, just as there are several names for a person… Example: Rebecca can also be called Becky.

• We can refer to ½ as 2/4. These are called EQUIVALENT FRACTIONS.

Where is the Numerator and the Denominator?

• What do you think? Using the fraction ½…

• Is the number 1 in the fraction the numerator or the denominator??

• Is the number 2 in the fraction the numerator or the denominator??

Top or Bottom?

• The numerator is the number on top of the fraction.

• Numerator has a “u” in it and so does “up.”

• Denominator begins with “D” and so does “down.”

• The 1 in the fraction ½ is the NUMERATOR.

• The 2 in the fraction ½ is the DENOMINATOR.

As a Fraction, How Do We Write the Shaded Parts?

• The NUMERATOR is the number that tells what part of a whole is shaded in.

• The DENOMINATOR is the number that tells the total of equal parts.

• For example, in one triangle, 1/3 of the triangle is shaded pink.

FRACTIONS!!