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### Number and algebra

### Geometry and measure

### Probability and statistics

### Working mathematically

### For younger learners

### Advanced mathematics

# Christmas Shopping

### Why do this
problem?

### Key questions

### Possible extension

### Possible support

Some children will find it helpful to use real or plastic coins and
real objects.

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Age 7 to 11

Challenge Level

- Problem
- Student Solutions
- Teachers' Resources

Children can use a range of strategies to work on
this problem . The youngest children might rely on counting and
would benefit from using real or 'play' coins. Other children might
use strategies related to counting 2's and 5's. More experienced
children could use addition and think in multiples.

What would you like to try to buy first?

Which things can you buy using the 20?

Which things can you buy using the 10?

Encourage the children to find all the combinations of coins
that could be used for each item. When the answer to the problem
has been found, ask them to calculate the change that would be
given when the items identified in the solution were
purchased.

Challenge the children to make up more questions to be
answered. For example:

- Choose what you would buy, then work out the total price.
- Is it possible to spend all the coins?
- What is the maximum number of items that could be bought?
- Change the prices so that all items would need change given.