Lesson video

Hello, everyone.

I hope you're ready for some great learning today.

Before we get started on our new learning, I was wondering if we could warm ourselves up a bit by practising some doubling and halving.

Here's how.

I'm going to hold up a number card and then you're going to double the amount shown on that number card using your fingers.

Let me give you an example.

Here we are, number one.

So you're going to hold up one finger and double one and double one is, shout the answer out.

Two, well done.

Let's do another one.

So two, we're going to hold up two fingers and then double two and double two is, shout the answer out.

Four, well done.

Now it's your turn.

Get those fingers ready.

I'm going to hold up a number card and then you're going to double it, are you ready? Three, hold up three fingers and then double it.

What's the answer? What is double three? Great, double three is six.

You're doing great at this.

You ready for the next number? Here it comes.

Four, hold up four fingers and then double the amount.

What is double four? I can hear a lot of you shouting out the answers.

That's great, double four is eight.

Well done, everybody.

And here comes the last number for doubling.

Are you ready? Five, what is double five? Great, double five is ten.

Well done everybody, give yourself two claps for great doubling.

Now we are going to have a go at halving and halving works a little bit like this.

So I'm going to hold up a number card, just like this and then you're going to have a go at halving it.

So here we go, number two.

So two fingers, then we're going to do half of two, which is one, half of two is one.

Now it's your turn, are you ready? Here we go, hold up four fingers and then find half of four.

What is half of four? Shout your answer out when you know.

Great, I can hear a lot of you shouting out the answer.

Here's our four fingers, half of four, is two.

Well done everyone and here's the last one.

Are you ready? Eight, hold up eight fingers.

What is half of eight? You are super speedy at this.

Here's eight fingers, half of eight is four.

Well done, everyone.

Give yourselves two pats on the back for great halving.

You have done a great job.

Now, for today we're going to be exploring the relationship between double and half.

Here's what you're going to need.

You'll need a tens frame, looks a bit like this.

You'll need two sets of number cards up to five, bit like this.

You'll need one set of number cards that increase in multiples up to ten.

So just like this, two, four, six, eight and all the way up to ten.

And then you'll need ten small objects for counting and a sheet that looks and little bit like this.

Don't worry if you can't find a sheet like this, you can just draw one, that's absolutely fine.

So press pause now to go and get your objects and your resources and I'll see you in a bit when you're ready.

Welcome back everyone.

Now that you've got all of the things you need for today's learning, we are ready to start.

Let's take a look at our star words.

I'm going to say them and you can repeat them after me.

Are you ready? Double, half, two, equal, same and part-whole model.

Those are our star words for today.

So now let's take a look at our tens frame.

It's going to help us a lot with our learning today.

So there we are.

Here's our tens frame.

And I'm going to pick one of my number cards that increase in multiples of two.

So let me just pick the first one, which is number two and put it right here.

That's a whole number.

So I want to find out what half of two is.

What is half of two? So to do that, I need to count two of my objects out.

And I'm going to share them equally between two, the two parts of my tens frame.

So here we are one, two.

There we are.

Who can tell me, I wonder if you can, what is half of two? Can you tell me what is half of two? Great, half of two, here's the half line, is one.

Those are our two parts.

So we have one here and one here.

So two is our whole number and there are two parts here, whichever one in one part and one in the other.

Two halves, one each half.

Let's have a look and see if we can write that using our whole-part model.

So here we are.

A whole number is two, so there you write two.

And our parts are one and one.

Very good.

Double one is two and half of two is equal to one.

Great counting everyone and great helping.

Let's see if we can do that using a different number.

So here we go, I'm going to choose number four.

Four is our whole number.

Can you say that? Four is a whole number.

Great, four is a whole number in our learning today.

So to find out what half of four is, I'm going to count out four objects and share them equally onto the tens frame.

Here we are, you can count with me.

One, two, three, four.

There we are.

Four is our whole number.

Now it's been shared equally into two equal parts.

Can you tell me what half of four is? Shout the answer out to the screen if you know.

I can hear a lot of you shouting out the answer.

Let's count one, two, half of four is two.

And you've got two in one part and two in the other part.

So four is our whole number and two is the number of our parts.

Let's take a look and see if we can write that in our whole-part model.

So four is our whole number, let's write number four here.

And our parts are two and two.

There we go.

Double two is equal to four and half of four is equal to two.

Great learning everyone, now it's your turn.

I'm going to hold up a number card and let's see if you can count out that amount of objects onto your tens frame, but remember to share them equally between the two parts of your tens frame.

Find out what half is and see if you can write that in your whole-part model.

Press pause to go and do that now and then I'll see you in a bit when you're ready.

Welcome back, everyone.

Did you find out what half of eight was? And did you manage to write that in your whole-part model? Let's have a look, see if we can do that together.

So here we are, there's number eight.

We're going to count out our eight objects shared equally into two parts of our tens frame.

One, two, three, four, five.

six, seven and eight.

There we are.

What is half of eight? Four, well done.

Here we are, so we've got four in one part and then we have four in the other part.

And we can use our whole-part model again to help us.

So here we are.

Eight was our whole number and our two parts were four and four.

Double four is eight.

Half of eight is four.

Well done everyone, you've done some great learning today.

Have a go and see if you can do that using number ten.

Press pause now to go and have a go and I'll see you in a bit when you're ready.

Well done everyone.

Did you manage to find out what half of ten was and fill in your whole-part model? I bet you did, well done everybody.

Now before we go today, I was wondering if I could ask you a question.

Let's take a look.

If I have one part which is five and another part which is five, what is double five? What is our whole number? Do you know? Shout the answer out to the screen if you do.

What is double five? Great, I can hear a lot of you shouting out the answer.

Double five is ten.

Ten is our whole number.

Half of ten is five.

Double five is ten.

Well done everyone.

You've done some great learning today, keep going.

Remember to practise doubling and halving using your tens frame, your objects and your whole-part model.

And I'll see you again next time.