ratio tables objective: i can explore how to find two or more ratios that describe the same...
TRANSCRIPT
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.