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Money
Objectives
To investigate making totals with money, using a system
Resources
Abacus Workbook 2 | Several of each of the following coins: 1p, 2p, 5p, 10p, 20p
Vocabulary
coin | value | pound | pence | penny | pennies
Today's Lesson
What to Get Ready
The following lessons are based on British currency. You may wish to teach your student about your local currency alongside these lessons. Please note, however, that the assignments will assess their understanding of money using British pence (p).
If you do not have access to British coins, print out the 📄 British Coins document which you can find in the General Resources. You can then cut out pictures of the coins you need.
Introduction
Explain that we will use a 20p coin, a 10p coin, a 5p coin, a 2p coin and a 1p coin in this part of the lesson.
Say:
- If we choose two of these coins, what is the greatest amount of money we could make?
- And the least?
- What other amounts could we make?
- I wonder how many different amounts we could make altogether?
Take some suggestions from your student.
Point out that it would be helpful to have a system so that we are sure we have found all of the possible amounts. It might be a good idea to start with the greatest amount or the least amount, which shall we do?
Discuss how this doesn’t matter, but creating an ordered list is the important thing.
Work together to begin an ordered list, for example: 20p + 10p = 30p; 20p + 5p = 25p; 20p + 2p = 22p; 20p + 1p = 21p; 10p + 5p = 15p.
Ask, ‘What shall we write next?’ Your student should write the next few lines.
Support your student to finish the list.
Discuss how making an ordered list helped you to keep track and to make sure that no possibilities were missed out.
This video demonstrates the above tasks.
Main Activity
Challenge your student to find as many different ways of making 10p as they can, using no more than five coins.
Encourage them to work systematically, beginning with the combination that uses fewest coins: 10p = 5p + 5p, and so on.
Extra Challenge
Write down an ordered list of totals of two coins that are less than 10p.
For example: 5p + 1p, 2p + 2p, 2p + 1p, 1p + 1p.
Ask, ‘Have I found all the pairs of coins that make less than 10p?’
Discuss how an ordered list makes it easier to see which pair (5p + 2p) is missing.
Workbook
To help your student build upon their learning from today, please ask them to complete the activities on page 58 of Abacus Workbook 2.