PPT-Ratios and Proportions Notes-Part 6

Reduce or Enlarge When looking at pictures sometimes they must be reduced or enlarged to fit a certain purpose In the example below the picture on the right is the original The picture on the left needed to be resized in order to fit on a flyer. Ratios ratios are one number expressed in relation to another by dividing the one number by the other For example the sex ratio of Delaware in 1990 was 343200 females to 322968 males or 106 This can easily be expressed in terms of males to females 9 5. : Ratios, Rates & Proportions . Section . 4. Solving Proportions. California Standards. Number Sense 1.2: Interpret and use ratios in different contexts.. Number Sense 1.3: Use proportions to solve problems. Use Cross-Multiplication as a method for solving such problems.. An introduction. Ratios express . relationships. 1 dozen eggs . $2.50. 2 cups of flour. 1 cake. This expresses the relationship that 1 dozen eggs cost $2.50. . This expresses the relationship that 2 cups of flour are needed to make 1 cake. Outline:. Ratios!. What is a Ratio? . How to Use Ratios? . How to Simplify?. . Proportions!. What is a proportion?. Properties of proportions?. How to use proportions? . Mysterious Problems…. Remember to Silence Your Cell . Phone and Put It In Your Bag!. Proportional Variance. Two quantities . vary proportionally. iff as their corresponding values increase or decrease, the ratios of the two quantities are always equivalent.. UNIT 6. Math 7 Plus. So far we have looked at the following ways to use ratios to find unit rates as well as to help us find other equivalent ratios. . GRAPHING IN A COORDINATE PLANE. Best used to make predictions about equivalent ratios. 3/28/17. How do we write ratios?. How do we write and simplify rates?. How do we decide whether two ratios/rates are proportional?. Today We’ll Discuss. Definition:. The . ratio. of two numbers . Lesson 5.2: Proportions. Chapter Five: Ratios and Proportions. Lesson 5.2: Proportions. Chapter Five: Ratios and Proportions. Lesson 5.2: Proportions. Chapter Five: Ratios and Proportions. Lesson 5.2: Proportions. John Barker & Jennifer Thomas. Nevada Math Project. March 2015. Big Ideas. Ratio – A ratio is used to measure two different things in two different units.. Ex. How far a car drives with how long it takes to get to the destination. . Resource: Van De Walle pages 154-159. 6. th. Grade Math- Focus 1. Ratios, Rates and Proportions. Welcome to Our Math Class!. . Let’s look around the room and see what . parts. . make up our . whole. RATIOS. A . ratio. compares the magnitude (size) of two quantities. There are two types of ratios: part-part and part-whole.. RATIOS. A . ratio. compares the magnitude (size) of two quantities. There are two types of ratios: part-part and part-whole.. KWL – . Ratios and Rates. What you Know Want to learn What you learned. Chapter . 1 . Notes. Chapter . 1 . Notes. Ch. . 1 . EQs. Lesson 1: . How does finding the GCF help you to solve real-world problems? . A comparison between two quantities . For every . x. units of one quantity, there are . y. units of another. A Ratio is…. Using a colon . Example:. . 2:3. As a fraction . Example: . Proportion – Learning Outcomes Express quantities as proportions of each other using fractions, decimals, ratios, and percentages. Divide quantities into a given proportion. Express errors as a proportion.