The following are some examples of fractions: This way of writing number names is called fraction notation. The top number is called the numerator and the bottom number is called the denominator. Section 3.31

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Fractions as Ratios A ratio is a quotient of two quantities. We can express a ratio with fraction notation. Section 3.33

What part of this collection of toys are balls? What part are clowns? For the shapes on the left, what is the ratio of: 1. squares to circles? 2. circles to the total number of shapes? 3. pentagons to squares? 4. total number of shapes to pentagons. Section 3.34

The Number 1 in Fraction Notation for any integer n that is not 0. The Number 0 in Fraction Notation for any integer n that is not 0. Section 3.35

A Denominator of 0 is not defined for any integer n. (When asked to simplify we write undefined.) Any Integer In Fraction Notation Any integer divided by 1 is the integer itself That is, for any integer n. Section 3.36

Homework: Problems 19, 29, 31, 33, 35, 41, 43 – give your answer and justify (in words, drawing, work, etc.) how you got it. Problems 53, 59, 67 – copy the problem, give your answer (top down). Justify your answer in words. Section 3.37