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What is a fraction?
 

What is a fraction?

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    What is a fraction? What is a fraction? Presentation Transcript

    • An Introductory Math LessonBy That Math Lady
    •  A fraction is a part of a whole. Sometimes we use other words when we talk about fractions: part section piece portion slice division
    •  Have you ever taken one slice of pizza from entire pizza? Sure you have! Did you know that when you remove that one slice, you are taking one slice, or a fraction, of the whole pizza?!
    •  Have you ever eaten just a few pieces of candy out of a bag? When you pour those candies into your hand, you are eating a portion, or a fraction of the whole bag of candy!
    •  Have you ever participated in a team? Did you know that you’re one member of that whole team..a part of that whole team…a fraction of that whole team?!
    • Knowing the parts of a fraction are important!There are two digits to consider when writing fractions: numerator The numerator shows how many pieces are taken.There is a top digit,which is called the numerator... The denominator shows how many equal pieces are …and a bottom denominator available to be taken.digit, which is called the denominator.
    •  Always look at the big picture first…the whole. How many pieces is the whole divided into? • This pie is divided into 2 pieces. • Therefore, my denominator would be 2. 2
    •  What is the denominator of the ballet students in this whole class? What is the denominator of the cookies on this entire baking sheet?
    •  The correct denominator to represent all the girls in the ballet class is5 5 The correct denominator to represent all the cookies on the baking sheet is 9 9
    •  Now that you know how to find the denominator, let’s learn about the numerator! Let’s look at that ballet class again…
    •  Let’s answer the question: What fraction of the class are wearing purple shirts? First, let’s see how many ballet students are wearing purple shirts:
    •  Two students are wearing purple shirts. That is going to be our numerator. Do you remember the denominator from the previous slides? If so, write it down beneath the numerator and the fraction bar to find your answer!
    •  Question: What fraction of the class are wearing purple shirts? Answer: 2 5
    • In other words, two out of five ballet students in the wholeclass are wearing purple shirts! That is a fraction of the class! What other fractions can you find in this picture?