I can explore how to express the relationship between two quantities

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Presentation transcript:

I can explore how to express the relationship between two quantities Ratios Objective: I can explore how to express the relationship between two quantities

Start Thinking! You want to make chocolate milk for 3 friends. The recipe calls for 12 ounces of milk for every 2 tablespoons of chocolate syrup. Draw a model to represent how many total parts of milk and chocolate syrup you will need.

Comparing Quantities Work with your table mates Comparing Quantities Work with your table mates. Use the collection of objects listed on your worksheet to complete each statement.

Garbage Basketball Work with your table mates. When we head out into the hallway, take turns shooting the wadded up paper into the recycle bin from a reasonable distance. Organize the numbers of shots you made and shots you missed in a chart. What should the chart look like? How should you keep track?

A great way to keep track is by using tally marks A great way to keep track is by using tally marks. They are simply a quick way to count and keep your counting organized so you can quickly add up the total. They look like this: Use one line to mark each item. When you get to “5”, cross the lines. Each “crossed line” group equals five.

What should your chart look like? Let’s play ball!

How did your group do?

Work with your table mates to complete Activity 3

Work with your table mates to complete Activity 4

Warm Up A soccer ball is made up of 12 pentagons and 20 hexagons. Draw a diagram to represent the relationship between the two quantities.

What is Your Answer? Using what you learned yesterday, work with your table mates to answer questions 5 and 6.

Let’s think about eye color…. What ratio of eye color are in our classroom? BROWN GREEN BLUE HAZEL What is the ratio of brown to blue? What is the ratio of hazel to green? What is the ratio of brown to all eye colors?

Complete Practice problems 1 and 2 on your worksheet. On your OWN… Complete Practice problems 1 and 2 on your worksheet.

KEY IDEA Ratio - A ratio is a comparison of two quantities. Ratios can be part-to-part, part-to-whole, or whole-to-part comparisons.

What if the ratio was 2 to 3 instead?

Complete Practice Problems 3-7 on your own.

The following tape diagram represents the ratio of shirts to sweaters worn by students in a class. a. Write the ratio of shirts to sweaters. b. There are 10 sweaters. What does each part represent? Explain. c. Using the information from b. how many shirts are there? Shirts Sweaters