Lesson video

Hello everyone.

And welcome to maths with Ms. Dobrowolski.

In this unit we're studying all about money and in this lesson, we'll be revisiting the value of coins.

So those of you who've been to my lessons before, welcome back, and for new faces, it's really nice to meet you.

In today's lesson, the agenda will go as follows.

First, we'll begin by making totals with the same coins, then we'll complete a talk task followed by making totals with different coins and finally, you'll be off for your independent task.

For today's lesson, you will need a few items. First, you need to make sure you have a pencil.

Then you need to make sure you have a notebook or something to write on.

And you might also want to get some coins, make sure to ask an adult for help in getting coins.

If you can't get any coins, that's completely fine, they are not necessary for this lesson.

However, if you don't have a pencil or notebook, please pause the video now and go get these items. Great, so we'll start off our lesson by just doing a quick review of all of our coins.

So my turn, your turn.

1p 2p 5p 10p 20p 50p one pound two pounds.

Well done.

We're going to learn today is how we can change one type of coin for another to make the same amount of money.

So here I have a 10 pence coin, that is my whole.

How could I make 10 pence using 5p coins instead? Well, I know that my whole is ten pence, so I'm going to use a bead string to help me.

So here I have my whole, which is 10 beads.

1, 2 3 4 5 6 7 8 9 10.

Now I need to split my whole into parts, and my parts are always the value of the new coin I'm going to use.

So in this case, I want my new value to be 5p.

So I have to split my parts into parts that will be equal to 5p.

So let's count together five beads.

1, 2, 3, 4, 5.

Good.

That is my first part.

Now my second part should also have five beads.

Count with me.

1, 2, 3, 4, 5.

Great.

I know five and five are equal to 10.

So how many parts do I have? 1, 2.

So if I have two parts in my whole, that must mean I need two 5p coins to make 10, because five pence plus five pence is equal to 10 pence.

So I need two 5p coins to equal one 10p coin.

Let's try it again.

Again, I have a 10p coin, so my whole is 10 pence.

How could I make ten pence using 2p coins instead? Well, let's use our bead string again.

So I know my whole is going to be 10 because my whole is 10 pence.

But let's just count our beads just to make sure I've got it right.

Make sure you're counting with me.

1, 2, 3, 4, 5, 6, 7, 8, 9, 10.

Good.

I have 10 beads because my whole is 10.

Now I need to split my whole into parts and I know that each part will have a value of two because I want 2p coins.

So we're going to count two beads and make a part, so make sure you're counting with me.

1, 2, 1, 2, 1, 2, 1, 2, and then 1, 2.

So let's see how many parts do I have.

Count with me.

1, 2, 3, 4, 5.

I have five parts.

So that must mean I need five 2p coins to make one 10p.

So let's count and make sure we're going to skip count by two and hopefully this will make 10.

Count with me.

2, 4, 6, 8, 10.

Excellent.

So five 2p coins are equal to one 10p coin.

Now let's try with a different whole, my whole, this time is 20 pence.

How could I make this using 10p coins instead? Well, let's take our whole, our whole is, you tell me? 20 pence.

Well done.

So I want each of my parts to have a value of 10 because I'm using 10p coins to make 20 pence.

So we have to make sure we have 10 beads in each part.

Count with me.

1, 2, 3, 4, 5, 6, 7, 8, 9, 10.

Great, that's my first part.

And my other part should also have 10 beads.

Count with me.

1, 2, 3, 4, 5, 6, 7, 8, 9, 10.

Excellent.

So, because I had two parts, that would mean I need two 10p coins to make 20 pence.

If we skip count by 10, it should equal 20.

10, 20.

Excellent.

So two 10p coins are equal to one 20 pence coin.

Well done.

Let's stick with our 20 pence.

So again, my whole is 20 pence.

How could I make this using 2p coins instead? What's my whole? That's right, it's 20 and each of my parts will be equal to what? that's right, they'll be equal to two.

So we have to make sure in each part we only have 2.

So we count 1, 2 1, 2 1 2 1 2 1 2 1 2 1 2 1 2 1 2 1 2.

That was quite a lot of 1, 2.

So let's count how many parts we have now.

Count with me.

1, 2, 3, 4, 5, 6, 7, 8, 9, 10.

So hopefully ten 2p coins that I've put here will equal 20 pence, but just to make sure, let's skip count by 2s and make sure we make 20 pence.

So make sure you're counting with me.

2, 4, 6, 8, 10, 12, 14, 16, 18, 20.

Excellent.

So ten 2p coins are equal to one 20 pence coin.

Great, it's now time for your talk task.

I want you to fill in this table and answer the question.

How many of each coin will you need to make 50p? So this is what you'd say out loud.

My whole is 50.

We need to make the whole with, for example, two pence coins.

I think we can change 50 pence coins for 25, 2 pence coins.

And the way I did that was I skipped counted by the value of the coin, which is two until I got to 50.

And the amount of times I skipped counted was equal to how many coins I would need.

So I went, 2, 4, 6, 8, 10, 12, 14, 16, 18 20 22, 24, 26, 28, 30 32 34, 36, 38, 40 42, 44, 46, 48 50.

And that gave me 25 coins.

So what you need to do now is figure out how many of each coin we would need to make 50p? You can pause the video now and continue your talk task.

When you're ready, make sure to resume the video and we'll go over the answers together.

Good luck.

I know you can do this.

Great, so hopefully you paused the video, completed your talk task and you're ready to go over it.

So we did 2p together, and for 5p it looks like we needed ten 5p points to make 50.

And that's because if we skip count by fives, we would have to skip count 10 times 5, 10, 15, 20, 25, 30, 35, 40, 45, 50.

So I skipped counted 10 times by five.

So I would need ten 5p coins.

I would need five 10p coins to make 50 because if I skip count by tens, I'll have to do that five times to make it to 50.

10, 20, 30, 40, 50.

So that's five times I skipped counted.

So I would need five, 10p coins.

Interesting, did you all find that skip counting by 20 to make 50 is impossible? Let me show you what happened when I tried to do that.

So what happened when you tried to change 20p for 50p? Well, the first thing I did was I counted 20, 40, and I got to 40 and I realised, that's not enough, I didn't make it to 50.

So let me add another 20p coin, 20, 40, 60.

Now I've gone too far.

So when I had two 20p coins, I didn't have enough.

And when I had three 20p coins, I had too much.

What can I do to make 50 pence then? Well, what if we use a different type of coin? What I'd like for you to do now is pause the video and think what coins could we put here to make 50p? Pause the video now and have a think, when you're ready, unpause and we can talk about it.

Good.

So I wonder what you came up with because when I did this, I realised, 20 plus 20 is 40.

How much more do I need to make 50? Well, if I'm already at 40, I just need 10 more.

I need 10 more pence to make 50, so I can use my 10p coin.

You can make 50 pence using many different coins.

You don't have to add 20, 20, and 10 pence.

You can do this many different ways.

If you're feeling very confident and you think, I can think of a load of different ways to make 50p, then you can pause the video now and write all of those ways down.

If you're thinking, I'm not too sure yet, stay on the video with me and we can work out some combinations together.

So pause now if you can think of other combinations, otherwise continue on with me.

So let's have a think.

I've started us off and together we'll figure out what coin we're missing.

So I want to make 50p, I'm going to start with 20.

20 plus 10 is 30, 30 plus 10 is 40, 40 plus five is 45.

How much more do I need to get from 45 to 50? Let's count up.

So I start at 45, 46, 47, 48, 49, 50.

So I need five more.

Do I have a coin that has a value of five? I do.

I have my 5p coin.

So this is one possible combination for making 50p.

I can also do this with another combination.

This one is a bit more of a challenge.

So again, I want to make 50p, so let's start with the 10p coin that I put.

10 plus 10 is equal to 20, 20 plus 10 is equal to 30, 30 plus 10 is equal to 40, 40 plus five is equal to 45.

And 45 plus two is equal to 47.

If I'm at 47p how much more do I need to make 50p? So I'm at 47, let's count up 48, 49, 50.

I need three more pence to make 50.

Is there a 3 pence coin? No, there's not.

However, I do know that to make three more p I can use 2p coin and the 1p coin.

So if I'm at 47 here, 47 plus two is equal to 49, 49 plus one is equal to 50 and I've made 50 pence.

Those of you who paused the video and found other combinations, actually, you came up with way more than I could, so well done all of you.

It is now time for your independent task.

Let's see.

How many ways can you make one pound using 5, 10, 20, and 50p coins? If you have some coins now would be a great time to put them in front of you and use them to make all the different combinations to make one pound.

If you don't have coins, that's completely fine, all you really need to do is write down the different values the way I did.

So I've started you off by thinking of two combinations, two different combinations that make one pound.

So for example, in the first one, 50p plus 20p is equal to 70p.

70p plus 20p is equal to 90p.

90 plus 5p is 95p and 95p plus 5p is 100p or one pound.

In the second example here I have 20p plus 20p is 40p.

40 plus 20p is 60p.

60p plus 20p is 80p And 80 plus 20p is a 100p or one pound.

So it is now your turn, make sure you pause the video, complete your independent task and when you're finished we can go over the answers.

Good luck.

Great, so hopefully you've completed your independent task, and now we can have a look at the different combinations, by the way, there were many different options.

So if you've got some different answers, that's okay.

You can ask an adult to help you and check to make sure that you made one pound.

However, I've got some other options here for you.

Maybe you did.

You completed 50p plus 50p which is equal to one pound.

Maybe you combined one 50p with a 10 with 1, 2, 3, 4, 5, 10p coins, or maybe you combined 20 plus 20 plus 20 plus 20 that's four 20p coins with the 10p coin, a five and two 5p coins.

There were loads of different options, as I said.

So if you've gotten something different, it would be really helpful if you asked an adult at home to double check your answers.

So well done, everyone.

I think this was a really interesting investigation and you all worked really hard.

If you'd like to, you can share your work with Oak National by asking your parents or carer to share your work on Twitter, tagging @OakNational and #LearnwithOak, especially if he came up with some really interesting combinations of coins, I'd be really thrilled to see those.

Remember, the final thing you need to do is to complete the quiz.

So well done everyone and hopefully see you next time.