# Money Charts Years 2 - 8

### Preparation

• For this activity you need this coin collection: 10x5¢, 10x10¢, 20x20¢, 10x50¢, 10x\$1, 5x\$2
• If you can't find enough around the house (ask, don't just take) print these coins (2 pages) and cut.
• Print these playing boards: Money Charts A ... Money Charts B.
• Write the title of this challenge and today's date on a fresh page in your maths journal.
Acknowledgement:
Designs used on the cut out coins are from GeoAustralia plastic Play Money. Contact GeoAustralia (wholesalers) to ask about distributors. Their catalogue page footer includes phone and fax. The contact link at the top of the page leads to an email form.
http://www.geoaustralia.com/english/Catalogue.html

### Getting Started

In this activity you will add and subtract small amounts of money - just a few coins at a time.
But you will do it on a chart that gives you clues about which coins to use each time.
You have to find the coins that are missing in all the empty squares of the chart.
• Open this Money Charts Starter.
You can read it on screen or print it.
• Use only Money Charts A for now.
Work with a partner if you wish.
Almost all the mathematics discovered this century has been by teams of mathematicians.
Have fun exploring Money Charts.
When you think you have the correct coins in every square (including squares with drawings), check your work using the information under Chart A.
Remember, the amount of money in each square must be made with the smallest possible number of coins.
• Record the finished chart in your journal.
Write a paragraph about how you worked it out.
Instead of writing a paragraph, you can draw a cartoon head and use thought bubbles to explain.

### Digging Deeper

When you think you have the correct coins in every square (including squares with amounts), check your work using the information under Chart B.
Remember, the amount of money in each square must be made with the smallest possible number of coins.
• Record the finished chart in your journal.
Write a paragraph, or draw a cartoon, to compare the thinking in Chart B with the thinking in Chart A.

### Extra Challenges

1. Design your own 2x2 or 3x3 Money Chart challenge with the coins.
Give your challenge to someone else to test.
1. Design your own 2x2 or 3x3 Money Chart challenge just using written amounts.
In these ones only the totals matters.
You don't have to use the smallest number of coins.
Give your challenge to someone else to test.

### Just Before You Finish

For this part you need your maths journal and your Working Like A Mathematician page.
• Read again what it means to work like a mathematician.
• In your journal, finish this paragraph:
Working with Money Charts I was a successful mathematician because...

1. This chart takes extra thinking.
There is enough information to make it work.
You still have to use the smallest number of coins for each amount.
Record the solution in your journal.