Lesson video

Hello, my name's Mrs. Cornwell, and I'm going to be working with you today.

And we're going to be finding out all about money, okay? So I would imagine you already know quite a lot about money because we see it all around us every day, don't we? All different types of coins and notes.

So we're going to find out how we can use money in different ways.

We can use it to pay for items, we can add up how much money we've got.

And so the learning we do today is going to be really useful for us, isn't it? So I'm really looking forward to working with you.

I know you'll work really hard, so let's get started.

Okay, so in our lesson today, we are going to calculate the total value of a set of 10 p coins.

And this lesson comes from the unit, Unitizing and Coin Recognition, Value of a Set of Coins.

Okay, so we will skip count in tens, and that will help us to find the value of a set of coins so we can work out how much things cost, can't we? Okay, and that will be really useful.

So our keywords today are 10-pence coins.

My turn, 10-pence coins.

Your turn.

And value.

My turn, value.

Your turn.

And 10 p.

My turn, 10 p.

Your turn.

And tens.

My turn, tens.

Your turn.

Well done.

Excellent.

So in the first part of our lesson then, we will find the value of 10 p coins using 10-spot tokens.

And in this lesson you'll meet Sofia and Jun, okay? They're going to be finding out about 10 p coins with us.

So Jun and Sofia are counting some coins from their toy shop, okay? They're a bit muddled up there, aren't they? They sort the 10-pence coins and the one-pence coins into two groups.

And there you can see, that makes them look a lot more easy to count, doesn't it? And Jun says, "I will count the one-pence coins.

I have ten one-pence coins, I have 10 p." Sofia asks, "I have 10 coins too, so do I also have 10 p?" Hmm, I wonder, what do you think? Jun says that can't be right.

The coins have different values, so they cannot be worth the same.

We know that each 10 p coin represents a group of ten one-pennies, don't we? We see 10 p, but we think 10 pennies.

And there we are.

We can see the 10 pennies, that each 10-pence coin represents.

Each coin can be represented by a 10-spot token.

And those spots just remind us of those 10 pennies, don't they? The 10-spot tokens remind us of each group of 10 pennies.

So we've got groups of 10.

I wonder how we could count the 10 p coins then? So we can count 10 p coins in two ways.

We see 10 p, but we think 10 pennies.

So we can count each group of 10 pennies, okay? And there are the 10-spot tokens to remind us of each group of 10 pennies.

One 10-penny, two 10-pennies, three 10-pennies, four 10-pennies, five 10-pennies.

There are five coins.

And each coin has a value of 10 p.

That means we can also count in 10s then, doesn't it? 10 p, 20 p, 30 p, 40 p, 50 p.

This is 50 p.

And there's Sofia saying the coins I had were worth 50 p.

Now Sofia finds some more 10-pence coins.

Let's find their total value.

"I will use the 10-spot tokens to help me," she says.

One 10-penny, two 10-pennies, three 10-pennies, four 10-pennies.

There are four coins.

Each coin has a value of 10 p.

That means, that's right, we can count them in tens.

10 pence, 20 pence, 30 pence, 40 pence.

This is 40 p, isn't it? Well done.

Okay, so now it's time to check your understanding.

Collect the 10-spot tokens to help you count the groups of 10 pennies.

And there are some stem sentences there to help you.

So complete the stem sentences and find the total value of the coins shown.

And then you have some options there.

So A is the total value, six pence.

B is the total value of 60 pence, or C is the total value, 30 pence.

So pause the video now while you work that out.

Let's see how we got on.

So there are the tokens to represent each 10-pence coin.

One 10-penny, two 10-pennies, three 10-pennies, four 10-pennies, five 10-pennies, six 10-pennies.

So we know there is six coins.

Each coin has a value of 10 p.

So that must be 10 p, 20 p, 30 p, 40 p, 50 p, 60 p.

This is 60 p.

So well done if you got that.

Now Jun counts these coins.

So look carefully at those coins there.

"This is 60 p," he says.

Do you agree? Let's represent the coins with tokens to check.

So there are the tokens.

We can see that Sofia's put some tokens next to each coin.

Hmm.

So do you notice anything about those tokens? Sofia says, "I've noticed something important." And Jun has too.

Not all of the coins are 10 p coins, so we can't count them all in tens.

The five-p coins will need five-spot tokens, won't they? So you only use the 10-spot tokens to represent 10 p coins because they're representing ten one-pennies.

So there we can see now that the five-pence coins have got some five-spot tokens to represent them.

10 p, 20 p, 30 p, 40 p.

Now we must count from 40 p in fives.

45 p, 50 p.

So well done if you noticed that as well.

And there's Jun and he says, "I think there's a way to count them in tens." Hmm, I wonder what he's thinking? Ah, can we see what he's done? He says, "I can put two five-p coins together, and they will have a total value of 10 p." So then he could have put those two five-pence tokens together and represented them with one 10-spot token, couldn't he? And then that would've been 50 pence, 10 pence, 20 pence, 30 pence, 40 pence, 50 pence.

So well done if you spotted that as well.

So now it's time to check your understanding again.

Which set of coins can you count completely in tens? So think about the value of each coin in the sets to help you.

So pause the video now while you try that.

So let's see how you got on with that.

So did you spot C? Each coin was a 10-pence coin.

So to easily count the whole set in tens, every coin must be a 10-pence coin.

So we knew we could easily count that in tens.

But did anybody notice anything else? It is possible to count the whole set in tens if there is an even number of five-p coins, because these can be put together to have a value of 10 p as well, can't they? So if you look at B, you could have put those two five-pence coins together, and then you would've also been able to count that set in tens as well, wouldn't you? So well done if you spotted that as well.

Do you think you would've been able to count A in tens? No, because there's only one five-pence there.

So you can't make that into a 10 pence without some more coins being added, can you? Sofia wonders how she can check she has counted these coins accurately.

So she's used her 10-spot tokens to help her, hasn't she? And she says, "I think this is 40 p." Jun has an idea.

He says, "You could count back to the start." So she could count them, and then she could count back again, to see if she gets back where she started.

So let's have a look at what that looks like.

So 10 pence, 20 pence, 30 pence, 40 pence.

And then you could say 40 pence, 30 pence, 20 pence, 10 pence.

And she did get back to where she started when she counted backwards, so she knows she was right, doesn't she? So well done if you noticed that.

And there she is.

She's saying, "I was right." So now let's have another check.

Collect the 10-spot tokens to represent the 10 pence coins and count them.

Then count back to the start to check you counted them accurately, to know you were right, 'cause it's important to be able to check your work, isn't it? So pause the video now while you try that.

And let's see how you got on.

So there are the 10-spot tokens to represent each 10 pence.

And then let's count.

10 pence, 20 pence, 30 pence, 40 pence, 50 pence, 60 pence, 70 pence, 80 pence.

And now let's count backwards to check that our count was accurate.

80 pence, 70 pence, 60 pence, 50 pence, 40 pence, 30 pence, 20 pence, 10 pence.

So well done if you did that.

Excellent.

So here's your task for the first part of our lesson.

So here are some cards with some coins on, and you need to use real coins to make each card.

Make sure you use the same coins, so you'll have to look really carefully, won't you? Then tick each card that can be counted completely in tens.

Draw the 10-spot tokens for the cards you've ticked and find their total value.

Remember, count backwards to check you were right, you always need to check your work, don't you, to make sure that you've worked accurately.

Did you find any sets where five-p coins could be used to make a new 10 p? Have a look carefully for that as well.

So pause the video now while you try that.

Okay, so let's see how you got on here then.

Okay, so to count completely in tens, we are looking for the sets that have only 10 p coins, aren't we? So where did you spot those? So if we have a look at A, we can see that there is a two-p coin there, so that is not one of those sets, is it? What about B? That's right, B can be counted completely in tens, because it has only 10 p coins.

Did you spot any others? That's right.

E also can be counted completely in tens, because it has only 10 p coins.

So each of these sets had only 10 p coins, so they could be counted completely in tens.

But did you spot any other sets where you could have used what you know about numbers to put amounts together to perhaps make new values of 10 pence? So that's right.

If we look at F here, we can see there are two five-pence coins there, and we know two five-ps will have a value of 10 p.

So we could have put two five-p coins together to have a value of 10 p here, and you could have also counted that in tens.

And there are the two five-pence coins making 10 p.

And then let's have a look.

D only has one five-p coin.

So we know that that can't go together with any of the other coins there to make a value of 10 p.

Okay, let's have a look at C.

That has a lot of five-p coins, doesn't it? So let's see if we can put them together to make a new value of 10 p.

So if we have a look, so those two fives would have a value of 10 p.

And so with those two, and so with those two, but we could see that there is an odd number of five-pence coins.

There are seven five-pence coins there.

So that last five-pence can't be put with any of the other coins to make a value of 10 p.

So that cannot be counted completely in tens, can it? So well done if you noticed that.

So now let's look at how we drew the 10-spot tokens to represent this.

Okay, so we know it takes a long time to draw 10 spots, so we can write 10 in the middle of our counter instead, can't we? So we can see there are five 10 pence coins.

So you would draw five 10-spot tokens, wouldn't you, like that? And then count them 10 pence, 20 pence, 30 pence, 40 pence, 50 pence.

And then we can count backwards to check, can't we, to make sure we're accurate.

50 pence, 40 pence, 30 pence, 20 pence, 10 pence.

So we knew we were right, well done.

Then this next set, we can see we have seven 10 pence coins.

So we have to draw the tokens, 10 pence, 20 pence, 30 pence, 40 pence, 50 pence, 60 pence, 70 pence.

To count backwards again, we can say 70 pence, 60 pence, 50 pence, 40 pence, 30 pence, 20 pence, 10 pence.

So well done if you did that.

So this last one, let's have a little look.

So how would we do the tokens to represent those coins, I wonder? That's right, you would need to put four 10-spot tokens for the 10-pence coins to represent those.

But then you would need five-spot tokens to represent the five-pence coins.

And then we could go 10 pence, 20 pence, 30 pence, 40 pence, and then put our two five pences together to make a new 10-pence.

And that would be 50 pence.

And then let's count backwards.

50 pence, 40 pence, 30 pence, 20 pence, 10 pence.

So well done if you did that, especially if you spotted those two five pences going together to make a 10-pence.

Excellent thinking.

So the second part of our lesson today is finding the value of a set of 10-pence coins.

But this time we're going to do it without our 10-spot tokens.

So Jun is here, and he wants to find out the total value of the coins in his pocket.

But this time he has no tokens to help him.

But there are his coins.

Sofia says, "I don't think we need them." We know lots about counting in tens now, and we know lots about the value of coins.

So what is the value of each coin? One 10-pence, two 10-pence, three 10-pence.

So we know there are three coins, and each coin has a value of 10-pence.

We know when pennies are in groups of 10, we can count them in tens, can't we? 10 pence, 20 pence, 30 pence.

This is 30 pence.

So well done if you spotted that.

So Jun's just telling us there, he's found out, hasn't he? "The coins in my pocket are worth 30 pence." The children put their coins together.

What is the total value of their coins now? So there's a lot more coins, but we can use exactly the same strategies, can't we? Okay, we can still use what we already know to help us.

There are mm coins.

So there are nine coins.

Each coin has a value of 10 pence.

That's right.

So let's see.

Each 10 pence represents 10 pennies.

So we can count them in tens.

10 pence, 20 pence, 30 pence, 40 pence, 50 pence, 60 pence, 70 pence, 80 pence, 90 pence.

This is 90 pence.

So well done if you did that.

And of course you could count them backwards again to check you were accurate, couldn't you? So now time for another check.

Complete the stem sentences, then find the total value of the coins shown.

Okay, so there are some stem sentences to help you there and there are the coins.

So pause the video now while you work that out.

So let's see how you got on with that.

There are five coins, that's right.

Each coin has a value of 10 p.

So this is 50 p because you can count them in tens, can't you? 10 pence, 20 pence, 30 pence, 40 pence, 50 pence.

So you should have said 50 pence.

Each 10-pence coin represents a group of 10 pennies.

So we can count them in tens.

Well done if you did that.

The children do some jobs, and they're paid 10 p for each job they do.

Let's see who earned more money.

So their coins are a bit muddled up at the moment.

They're quite tricky to count, aren't they? So Sofia says, "I will move the coins into a line to help me count." So there she's put her coins in a line.

And she's also put Jun's coins in a line.

Each coin is worth 10 pence.

"So I will count them in tens," she says, I wonder if you spotted a different way to do that? Let's use Sofia's method, and then we can talk about a different way.

So Sofia went 10 pence, 20 pence, 30 pence, 40 pence, 50 pence, 60 pence, 70 pence, 80 pence.

And then 10 pence, 20 pence, 30 pence, 40 pence, 50 pence.

So we can see I have 80 pence, and Jun has 50 pence, so I have more money.

Did you spot a different way to find out who had more? Oh, Jun did.

He says, "I knew that.

I didn't need to count." How did he know? Every coin has the same value, doesn't it? So when lined up, we can see Jun has more coins than Sofia when the coins are matched up.

Okay, so now it's time to check your understanding again.

So here are Jun's 10 p coins.

Tick the set that is worth less than Jun's coins.

So you can see he's got six coins there.

So pause the video now while you work that out.

Okay, and how did you get on? Did you spot it? That's right.

It was A, wasn't it? Jun has six 10 p coins and set A only has four 10 p coins.

So that must be worth less than Jun's coins.

So well done if you've got that.

Now Sofia says she needs nine 10-pence coins to pay for a balloon.

Jun wants to know how much it costs.

Oh, I wonder.

"I can't see the coins.

How can I find their value?" says Sofia.

Jun has an idea.

He says, "We could represent each 10 p coin as a step of 10 on a number line." That's a really good idea.

So there's a number line, and there are nine coins.

So we're going to need nine steps, and each step is going to be worth 10 pence, isn't it? So let's do that.

So there is one 10 p coin.

Two 10 p coins, three 10 p coins, four 10 p coins, five, six, seven, eight, nine.

So now we've got our steps representing the coins, we can work out their value.

"So each step represents 10 pennies.

I can count them in tens," says Sofia.

10 pence, 20 pence, 30 pence, 40 pence, 50 pence, 60 pence, 70 pence, 80 pence, 90 pence.

Excellent, the balloon costs 90 pence.

So now it's time to check your understanding again.

Use the stem sentences to help you draw the steps on the number line and find the total value here.

So there's a pencil, and Jun says, "I need four 10 pence coins to pay for this pencil." So the stem sentences are there to help you.

Pause the video while you try that.

And let's see how you got on.

So there are four coins.

He tells us that each coin has a value of 10 p.

So let's draw our number line to help us.

So there's our number line, and we are going to need four steps of 10 p, aren't we? Because we have got four 10-pence coins.

So there's our four steps of 10 p.

And then 10 pence, 20 pence, 30 pence, 40 pence.

So this is 40 pence.

Well done if you did that.

The pencil cost 40 pence.

Jun pays for a drink using eight 10-pence coins.

Sofia tries to find the cost of the drink.

Jun says, "I have an idea.

We could draw the coins." "It will take me a long time to draw the coins, so I have a different idea," said Sofia.

She's trying to find a more efficient way to work, isn't she? "I'll use my fingers to represent each group of 10 that I count.

There are eight 10-pence coins, so I will put up eight fingers." So each finger will represent a coin.

So there's eight fingers.

So because there are eight coins, each coin has a value of 10 pence.

So that means we will count in tens, that's right.

10, 20, 30, 40, 50, 60, 70, 80.

So this must be 80 pence.

So she used a really useful strategy there, didn't she, to help her when she couldn't see the coins.

So now it's time to check your understanding again.

Count in tens on your fingers to find the cost of Sofia's apple.

So she's given us some information there.

"I paid for my apple using six 10-pence coins." So use the stem sentences to help you, and then use your fingers to find out how much her apple costs, okay? So pause the video now while you try that.

Okay, and then let's see how you got on.

So there are six coins, she told us that.

And each coin has a value of 10 p.

Okay, so she would've put one hand, first of all, wouldn't she? And then counted 10, 20, 30, 40, 50.

But she needed six coins and she's only got five fingers, so she needs another finger and she needs to count 10 more, doesn't she? So that would be 60.

So it would be 60 pence.

So well done if you did that.

So now here's the task for the second part of our lesson.

Play a game with a partner.

You will need a set of 10 10-pence coins.

And there's Jun.

He says, "I will pick up a handful of coins from our set and tell you how many coins I have." And Sofia's saying, "I will skip count on my fingers in tens to find the total value of your coins." "I will count my coins in tens to see if you are right," says Jun.

"And then we will both draw the coins and write their total value to prove we were right." Pause the video now while you try that.

Okay, so here's the second part of our task.

Sofia put some 10 p coins in her piggy bank.

She gives us some clues so we can find out how much she put in.

And Jun's going to give us some clues as well, I think.

So he says, "There are fewer than eight coins in the piggy bank." Sofia tells us there are more than four coins in the piggy bank.

So they're 10-pence coins, we know that.

And there are more than four, but fewer than eight.

How much money could be in the piggy bank? Work systematically to find all the possibilities, then draw the coins to show the amounts.

So pause the video now while you try that.

So let's see how we got on with our first task.

So Jun picked up some coins and he says, "I have five coins." And so Sofia says, "I will put up five fingers and skip count in tens, because they were 10-pence coins, using one finger for each number counted." So let's see what she did.

She said, "10, 20, 30, 40, 50.

And then the total value of your coins is 50 pence," she says.

Okay, and then they draw the coins to prove that, don't they? 'Cause then they can count them up and prove it.

So now the second part of the task, you may have done this.

So there's a piggy bank.

And we know that there's fewer than eight coins in the piggy bank, but more than four, and they're 10 pence coins.

So Sofia's saying, "I will think about the numbers which are between four and eight." So she's working systematically, in an order, isn't she? Okay, so first of all, five is between four and eight.

There could be five coins.

So if there were five 10-pence coins, then that would be 10 pence, 20 pence, 30 pence, 40 pence, 50 pence.

So there could be 50 pence in the piggy bank.

Six is between four and eight.

So there could be six coins.

So after five, she said, "Six." Because she's working systematically.

So there's the six coins.

So mm, Jun decides not to start counting from the beginning because he knew 10 more than 50 pence is 60 pence.

So there could be 60 pence in the piggy bank as well, couldn't there? So well done if you used that strategy.

Then Sofia says, she's done five and she's done six.

So now she says, "Seven is between four and eight." There could be seven coins.

So there's the seven coins she drew.

I wonder what strategies Jun will use? Do you think he'll count all of the coins there? No he didn't, did he? He said 10 more than 60 is 70 pence, so there could be 70 pence in the piggy bank.

"And then there are no more coins between four and eight.

So I know I found all the possibilities," says Sofia.

So by working in an order systematically, she knew that she'd found all the possible combinations.

So well done if you did that.

Okay, so let's think about what we've learned today then.

We can use 10-spot tokens to remind us that a 10-pence coin has the same value as 10 pennies.

We can skip count in tens to find the total value of a set of 10-pence coins.

We can check we have counted accurately by counting backwards.

And we can only skip count in tens if all of the coins in the set are 10-pence coins.

So well done with your learning today.

You've worked really hard.

And hopefully now feel really confident when you're working with those 10-pence coins.

Well done.