Introduction to Fractions Intro to Algebra Fractions A

Introduction to Fractions Intro to Algebra

Fractions A fraction is a part of a whole! Where do we see fractions?

Fractions What fraction of a whole pizza does each diagram display? The top number tells how many slices you have. The bottom number tells how many slices the whole pizza was cut into.

Parts of a Fraction • We call the top number the Numerator, it is the number of parts you have. • We call the bottom number the Denominator, it is the number of parts the whole is divided into.

Representing Fractions with Graphs • We can draw any type of image to represent a fraction. • Cut the image to have has many pieces as the denominator. • Shade the amount the numerator tells you to.

Draw a Diagram to Represent the Following Fractions • •

Fractions in Words To write the fractions in words, we have to be able to read fractions first! • We first read how many parts we have. Simply state the top number or the numerator. • Second we read how many parts the whole was cut into which is the bottom number or the denominator. • This number is said a little differently. It usually ends in “ths”, but different when it ends in a 1, 2, or 3.

Let’s Read Some Fractions! • •

Words to be aware of DENOMINATOR WORDS 2 Half or Halves 21, 31, 41, 51, 61, 71, … Twenty-firsts, Thirty-firsts, Forty-firsts, Fifty-firsts, Sixty-firsts, Seventy-firsts, … 22, 32, 42, 52, … Twenty-seconds, Thirty-seconds, Forty-seconds, Fifty-Seconds, … 3, 23, 33, 43, 53, 63, …. Thirds, Twenty-thirds, Thirty-thirds, Forty-thirds, Fifty-thirds, Sixty-thirds, … 4 Fourths or Quarters

Writing Fractions We write the fractions exactly how we read them. You need to put a hyphen (-) between the last two words!

Now Let’s Write Some Fractions! • •

Match the Fraction Words to Pizza Fraction to Pizza

Whole Numbers Can you write 15 as a fraction? Whole numbers can always be written as a fraction by putting it over 1.