1. 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

2. 2

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

4. 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

5. 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

6. 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

7. 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