Understanding Ratios and Proportions

This video tutorial introduces seventh graders to ratios and proportions, emphasizing their real-world applications. It explains how ratios can be represented in different forms and provides examples using flubber ingredients and baking soda with salt. The tutorial also covers using ratio tables to find equivalent ratios and demonstrates this with a paint mixing example.

What is a ratio?

• A multiplication of two quantities

• A division of a single quantity

• A comparison of three quantities

• A comparison of two quantities

Which of the following is NOT a way to express a ratio?

• Using a fraction

• Using the word 'to'

• Using a semicolon

• Using a colon

How can you interpret the value of a ratio?

• By multiplying the quantities

• By dividing the quantities

• By subtracting the quantities

• By adding the quantities

What is the first step in dividing fractions?

• Subtract the fractions

• Add the fractions

• Flip the first fraction

• Keep the first fraction the same

What is the purpose of a ratio table?

• To divide different quantities

• To subtract different quantities

• To add different quantities

• To find equivalent ratios

How do you find equivalent ratios using a ratio table?

• By multiplying or dividing each quantity by the same number

• By subtracting each quantity by the same number

• By adding each quantity by the same number

• By flipping each quantity

In a ratio table, how do you go from 3 to 12 using multiplication?

• Multiply by 3

• Multiply by 5

• Multiply by 2

• Multiply by 4

What is the equivalent ratio of 3:4 when multiplied by 5?

• 9:12

• 18:24

• 12:16

• 15:20

How do you ensure the correct ratio when mixing paint?

• By maintaining the original ratio

• By using more blue paint

• By changing the ratio

• By using more yellow paint

If you need 15 cups of green paint, how many cups of yellow paint do you use?

• 3 cups

• 6 cups

• 9 cups

• 12 cups