Minds On

School shopping

Two students are going shopping for school supplies.

Cart #1 has a total value of $6 and cart #2 has a total value of $11.

2 carts of school supplies. Cart 1 costs 6 dollars. Cart 2 has more supplies and costs 11 dollars.

Student #1 wants to buy the items in cart #1 and has a $10 bill. What will their change be?

Student #2 wants to buy the items in cart #2 and has a $20 bill. What will their change be?

We can use a number line or play money to solve this problem.

In this lesson, we are going to learn to estimate and calculate the change needed for different cash payments.

Action

What is change?

When we buy something and pay with money, we may be paying with an amount of money that has a greater value than the total amount. The money we get for the difference of the cost and payment is called change.

Buying candy

A shopper is buying some candy for $4. In their wallet they have three $10 bills and three toonies.

What money could the shopper use to pay for the candy? Explain your thinking.

A wallet that contains three ten-dollar bills and 3 toonies. The toonies are worth two dollars each. A pile of candy. The candy costs $4.

How much change would the shopper get back if they paid for the candy with $10?

Use pictures, numbers and words to explain your answer.

Practice #1

A vacationer is taking a trip to the lake. Before they leave on their trip, they visit the Beach Store to buy some items. Choose three of the following items for the vacationer to buy for their trip to the lake.

A fishing rod is 4 dollars, a beachball ia 3 dollars, a rubber duck is 1 dollar, a tube is 5 dollars, and a pail for 2 dollars.

How much change would the vacationer get back from $20? Explain your work.

Practice #2

A camper is going on a trip. Before they leave, they need to buy some supplies. Choose four of the following items for the camper to buy for their trip.

A backpack is 14 dollars, a pair of binoculars is 13 dollars, hiking boots are 11 dollars, rope for 9 dollars, and a tent for 12 dollars.

How much change would the camper get back if they paid with a $50 bill?

Explain your work using pictures, numbers or words.

Practice #3

A student is buying items for their art class. They need to buy a paintbrush, paint, an easel, a paint tray, and a blending board.

The following image displays the art store items and their prices.

An easel is 19 dollars, a paintbrush is 1 dollar, paint is 7 dollars, paint tray is 11 dollars, and a blending board is 4 dollars.

The student would like to buy all of the items. How much change would they get back from $60?

Demonstrate your work using pictures, numbers or words.

Brainstorm

Review

Which was the most challenging question to solve? Why?

What strategy helped the most as you solved the questions?

Consolidation

Lunch time!

A hungry shopper has $15. They purchased their lunch at a restaurant for $11.

Answer the following questions about the shopper’s purchase:

  • What would their change be?
  • What are some of the combinations of change they could get?

Reflection

How do you feel about what you have learned in this activity?  Which of the next four sentences best matches how you are feeling about your learning? Press the button that is beside this sentence.

I feel...

Now, record your ideas about your feelings using a voice recorder, speech-to-text, or writing tool.