This document provides examples and instructions for students to work through ratios and proportions problems involving mixing paint, doubling recipes, comparing ingredient ratios, and plotting color mixture points on a coordinate plane. Students are asked to calculate costs for painting, double recipes, write ratios to compare ingredients, identify mistakes in doubled recipes, and determine the common property of mixtures with the same shade of green.

1. AIM: Comparing Ratios
Do Now
You decide to paint your room. 3 gallon of paint costs 89.94 at Home
Depot. You will need 2 gallons of paint to paint your room and the
inside of your closet. Estimate how much will have to spend?
Rate: $ Unit Rate: $
gallons 1 gallon
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2. Anticipatory Set
Below is the ingredient list for Chocolate Chip cookies.
The recipe makes 60 cookies. Double the ingredients in
the recipe so that you can make 120 cookies.
• 2 cups all­purpose flour
• 1/2 teaspoon baking soda
• 1/4 teaspoon salt
• 2 sticks butter, softened
• 1 cup granulated sugar
• 3/4 cup packed brown sugar
• 1 teaspoon vanilla extract
• 2 large eggs
• 2 cups chocolate chips
• 1/3 cup chopped nuts
Why is it so important to measure correctly when
baking?
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3. 1 Batch 2 Batches
Write a ratio to compare the cups of flour to the cups of
sugar:
Ratio: Ratio:
Simplify: Simplify:
Will the cookies still taste the same if you double the
ingredients?
Why?
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4. Batch 1 Batch 2
The following person made a mistake when doubling the
recipe. They used 3 cups of sugar rather than 2. Write a
ratio and unit rate to compare the cups of flour to the cups
of sugar.
Ratio:
Ratio:
Simplify:
Simplify:
Will the cookies still taste the same?
Why or Why Not?
If they've already mixed the ingredients(they can't
separate the sugar from the flour), how might they
attempt to fix this problem?
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5. “Art Class”
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6. c) Carefully plot and label a point for each mixture on the
coordinate plane below:
Number of blue parts
Number of yellow parts
d) Draw a line connecting each point to the origin. What
do the mixtures that have the same shade of green have
in common?
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7. 7

8. 8

9. Before you leave:
Go back to the 5 mixtures.
Can you tell what percent of
each mixture each color is?
Find the percent of
each color (part) in
each mixture!
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10. Homework
Castle Homework #22 due
5/30/12
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