Decimals

Lesson

Money is made up of whole numbers (e.g. dollars, pounds) and decimals (e.g. cents, pence).

Pretend you're going out to lunch at a cafe.

- A menu: you can make your own or print this one
- An order form: you can make your own or print this one
- Money: you can use plastic money or print some off here (you'll need to cut it out)
- A pen

- Split up into groups of 2 or 3 people. Choose one person to be the cafe owner. The other people will be the customers. (Don't worry- you can take turns switching roles later.)
- Customers choose what they want for lunch and the cafe owner writes it on the order form with the prices.
- Once customers finish their lunch (this part is just pretending), work out as a group:
- The least number of notes and coins needed to pay the total amount.
- The notes and coins needed for change if the customer pays with a larger amount

- Discuss your results as a class.

Add and subtract decimal numbers to hundredths, including money amounts, using concrete materials, estimation, and algorithms (e.g., use 10 x 10 grids to add 2.45 and 3.25)