Lesson 4
Color Mixtures
Let’s see what colormixing has to do with ratios.
Problem 1
Here is a diagram showing a mixture of red paint and green paint needed for 1 batch of a particular shade of brown.
Add to the diagram so that it shows 3 batches of the same shade of brown paint.
Problem 2
Diego makes green paint by mixing 10 tablespoons of yellow paint and 2 tablespoons of blue paint. Which of these mixtures produce the same shade of green paint as Diego’s mixture? Select all that apply.
For every 5 tablespoons of blue paint, mix in 1 tablespoon of yellow paint.
Mix tablespoons of blue paint and yellow paint in the ratio $1:5$.
Mix tablespoons of yellow paint and blue paint in the ratio 15 to 3.
Mix 11 tablespoons of yellow paint and 3 tablespoons of blue paint.
For every tablespoon of blue paint, mix in 5 tablespoons of yellow paint.
Problem 3
To make 1 batch of sky blue paint, Clare mixes 2 cups of blue paint with 1 gallon of white paint.
 Explain how Clare can make 2 batches of sky blue paint.
 Explain how to make a mixture that is a darker shade of blue than the sky blue.
 Explain how to make a mixture that is a lighter shade of blue than the sky blue.
Problem 4
A smoothie recipe calls for 3 cups of milk, 2 frozen bananas and 1 tablespoon of chocolate syrup.
 Create a diagram to represent the quantities of each ingredient in the recipe.
 Write 3 different sentences that use a ratio to describe the recipe.
Problem 5
Write the missing number under each tick mark on the number line.
Problem 6
Find the area of the parallelogram. Show your reasoning.
Problem 7
Complete each equation with a number that makes it true.
 \(11 \boldcdot \frac14= \text{_______}\)
 \(7 \boldcdot \frac14= \text{_______}\)
 \(13 \boldcdot \frac{1}{27}= \text{_______}\)
 \(13 \boldcdot \frac{1}{99}= \text{_______}\)

\(x \boldcdot \frac{1}{y}= \text{_______}\)
(As long as \(y\) does not equal 0.)