Let's Go Shopping... Next Let's Go Shopping Today we will be... Exploring how different combinations of coins can make the same total Back Next In fact, they both have the same amount

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Let's Go Shopping

Today we will be... Exploring how different combinations of coins can make the same total

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Mental Oral Starter

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I have two coins.

I have three coins, so I have more money than you!

Is this correct?

Think, pair, then share your ideas.

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It could be correct...


...or it could be incorrect...


In fact, they both have the same amount of money – 25p. What coins must

they each have?

? ?


Did you work out the correct coins?


We're going to the stationery shop to buy some things we need for school!

Will you help us?


35p 42p

Colouring Pencils

£1 and 5p

I want to buy the notepad and pen for 35p.

What coins can I use to pay for them exactly?


35p

There are lots of different ways to make 35p exactly.

Here are some of them:

Did you think of a different way?

20p + 10p + 5p = 35p10p + 10p + 10p + 5p

= 35p5p + 5p + 5p + 5p + 5p + 5p + 5p = 35p


35p 42p

I want to buy the paint set for 42p.


Colouring Pencils

£1 and 5p


There are lots of different ways to make 42p exactly.



20p + 20p + 2p = 42p20p + 10p + 10p + 2p

= 42p10p + 10p + 10p +

10p + 1p + 1p = 42p

42p


35p 42p

I want to buy the colouring pencils for £1 and 5p.


Colouring Pencils

£1 and 5p


There are lots of different ways to make £1 and 5p exactly.



£1 + 5p = £1 and 5p50p + 50p + 2p + 2p

+ 1p = £1 and 5p20p + 20p + 20p + 20p +

20p + 5p = £1 and 5p

Colouring Pencils

£1 and 5p


Now you know that different combinations of coins can be used to make the same total, let's play a game!

In pairs or small groups, spread out a set of the Which Coins? Cards in front of you so that everyone can see them.

Are you ready?!


I have 18p in my purse. There is one 10p coin. There are no more than five coins in total.

What coins could I have?

18p

Use the Coin Cards to help you!

Can you find more than

one answer?


I have 18p in my purse. There is one 10p coin. There are no more than five coins in total.

Here are the coins I have...

Did you find this combination of

coins?

How many other combinations did you find?


I have 22p in my wallet. There is one 2p coin. There are no more than five coins in total.




one answer?

22p


I have 22p in my wallet. There is one 2p coin. There are no more than five coins in total.



coins?



I have 50p in my piggy bank. I do not have a 50p coin. All of the coins are silver.




one answer?

50p



coins?


I have 50p in my piggy bank. I do not have a 50p coin. All of the coins are silver.



I have 7p in my pocket. There are no silver coins. What coins could I have?



one answer?

7p



coins?


I have 7p in my pocket. There are no silver coins. Here are the coins I have...


Now it's time for you to explore how different

combinations of coins can make the same totals

yourselves!

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Plenary

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22p

Which two coins could I use to pay

for this chocolate

bar exactly?

Which four coins could I use to pay

for this chocolate

bar exactly?

Which three coins could I use to pay for this chocolate

bar exactly?

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Plenary

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22p

Did you find all the combinations?

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Let's Go Shopping... Next Let's Go Shopping Today we will be... Exploring how different combinations of coins can make the same total Back Next In fact, they both have the same amount