Ratios and Proportions in Recipes

This video tutorial covers unit 2, lesson 15, focusing on part-part-whole ratios. It begins with a warm-up activity involving true or false number sentences. The lesson progresses to an activity using cubes to represent paint mixing ratios, followed by an introduction to tape diagrams as a tool for understanding ratios. The video includes practice problems and concludes with a summary of the key concepts learned.

What does the first number sentence in the warm-up activity demonstrate?

• The concept of addition

• The concept of subtraction

• The concept of multiplication

• The concept of division

In the 'Cubes of Paint' activity, how many milliliters of maroon paint are there when 5 milliliters of red and 3 milliliters of blue are mixed?

• 5 milliliters

• 15 milliliters

• 10 milliliters

• 8 milliliters

If each cube represents 2 milliliters, how many milliliters of maroon paint are there in total?

• 10 milliliters

• 12 milliliters

• 16 milliliters

• 20 milliliters

What is a tape diagram used for?

• To represent decimals

• To represent ratios

• To represent fractions

• To represent percentages

In the tape diagram example, how many students are wearing sneakers if the ratio of sneakers to boots is 5 to 6 and there are 33 students in total?

• 12 students

• 15 students

• 18 students

• 21 students

How many parts of oil are needed in the chicken marinade recipe if the total marinade is 42 cups?

• 28 parts

• 21 parts

• 14 parts

• 35 parts

In the fruit punch recipe, if one batch includes 30 cups of apple juice, how large is the entire batch?

• 90 cups

• 80 cups

• 70 cups

• 60 cups

What is the total number of parts in the tape diagram for ducks and swans if the ratio is 4 to 5?

• 7 parts

• 9 parts

• 10 parts

• 8 parts

If there are 18 birds in total and the ratio of ducks to swans is 4 to 5, how many ducks are there?

• 6 ducks

• 8 ducks

• 12 ducks

• 10 ducks

What is the key feature of a tape diagram?

• Different sized parts

• No specific size

• Randomly sized parts

• Equal sized parts