Ratio Tables

Objective:I can explore how to find two or more

ratios that describe the same relationship

Start Thinking!

• A ratio is a comparison of two quantities. How do ratios relate to making cookies?

Activity 1 Making a Mixture

Work with your table mates. Complete part A only, then stop.

Once we have discussed part A complete parts B-F with your table mates.

Activity 2 Using a Multiplication Table

• Work with your tablemates to complete Activity 2.

• Remember the ratio of lemonade to iced tea is 1 to 3.

Activity 3 Using More than One Ratio to Describe a Quantity

• This is a whole new activity, and has nothing to do with Activity 1 or 2.

• Work through parts A-D with your table mates.

Practice Questions

• Answer questions 4 and 5 from the Big Ideas Math book.

Cool Down

• If you use 2 parts red and 5 parts blue to form a shade of purple, then what other quantities could you also use to produce the same shade?

Warm Up

Let me tell you a story…

I took a 6 day boat trip down a river. I’ve listed how many miles we travelled and the change in elevation.See if you can figure out the missing numbers

Number of miles 1 2 3 4

Drop in Elevation ?? 80 ?? ??

Equivalent Ratio

• Two ratios that define the same relationship . You can find equivalent ratios by:– Adding or subtracting quantities in equivalent

ratios– Multiplying or dividing each quantity in a ratio by

the same number

On your own…

• What if you use 24 cups of water. How much sugar do you need?

• You make a sweeter mixture using 3 parts water for every 1 part sugar. How much sugar do you need if you use 9 quarts of water?

On your own…

• What if you mix 2 pints of yellow paint for every 3 pints of blue paint? How much green paint will you make if you used 5 pints of yellow paint?

Practice Problems

Complete Practice Problems 1-7 on your

own.