Lesson video

Hello there my math friends.

It's Mrs. Khaira and it's Elvis, he's going to be helping us with our lesson today.

Now in this lesson, we're going to be exploring grouping objects in tens to find the total.

Let's get cracking.

Now for this lesson, you're going to need the following items. You'll need a bead string and some counting objects, perhaps using some cubes, and we'll also need the activity sheets provided in today's lesson resources.

Please ask a parent or carer to help you cut out the cards.

Now, if you haven't got these things ready, please take a moment to collect what you need and then resume the video when you've got what you need ready.

Right.

For our do now we are going to have a go at counting out groups of tens from zero to 50.

Each of my towers of 10 represents 10 cubes.

So all you had to have a go with me? Let's try now.

Zero, 10, 20, 30, 40, and 50.

Here, we have five groups of 10.

10, 20, 30, 40, 50.

Let's count backwards from 50 down to zero.

50, 40, 30, 20, 10 and zero.

Great counting everyone.

Now here are 50 animals represented by 50 cubes.

These are the 50 animals that live on old MacDonald's farm.

Now he wants to group them into groups of 10 and put each group of 10 into a separate field.

We're going to help him to do this.

Let's have a look at our first group.

Here is our first group of animals.

I wonder if you can tell me how many animals are in this group.

Let's count them out together.

One, two, three, four, five, six, seven, eight, nine, and 10.

This is one group of 10.

One group of 10 is equal to 10 animals.

Let's label that with the number 10.

Now, let's bring in another group of animals.

Here they come.

I wonder if you can tell me how many groups we've got now.

Shout the answer out to the screen.

Great.

We've got one group of animals and two groups of animals.

How many animals are in our second group? Let's count using our careful counting thinkers.

One, two, three, four, five, six, seven, eight, nine, and 10.

We've got one group of 10 and now we've got two groups of 10.

We can count in tens to find out how many animals we have together.

10, 20.

All together now we have got two groups of 10, which equals 20.

Let's bring it on next group of animals.

Here they come.

I wonder if you can tell me now how many animals we have in our groups all together.

Let's have a look and count and see.

We have got one, two, and three groups.

How many animals are in our third group? Perhaps we can count to check and see.

One, two, three, four, five, six, seven, eight, nine, and 10.

We have one, two, three groups of 10.

All together, we have got 10, 20, 30 animals.

Three groups of 10 is equal to 30.

Let's bring in our next group of animals.

Here they come.

Here they are.

Let's see now.

How many groups do we have all together here? One, two, three, and four.

There are four groups of animals.

How many animals are in our fourth group? Let's check, shall we? One, two, three, four, five, six, seven, eight, nine, and 10.

We have a fourth group of 10.

One group of 10, two groups of 10, three groups of 10, and now four groups of 10.

All together, let's count in tens to see how many animals we have.

10, 20, 30, then that must mean we have 40.

Great work everyone.

All together, four groups of 10 are equal to 40.

Last group of animals, here they come.

And here they are.

Now we've got one, two, three, four, and five groups of animals.

How many animals are in our last group? In our fifth group? Let's count and check.

One, two, three, four, five, six, seven, eight, nine, and 10.

We have got one, two, three, four, and five groups of 10 animals.

Now all together, how many animals does that mean we have? Let's count in tens to find out.

10, 20, 30, 40, and 50.

Well done everyone.

There are groups of 10, which are equal to 50 animals.

Right, let's have a look at our talk task for today.

For this activity, you are going to need the following things.

We're going to need your multilink cubes.

You're going to need your number cards, which were available in today's resources.

And you also need the picture cards showing groups of 10 represented by cubes.

It would also be a great idea to have your top partner handy.

So why I have got Elvis here ready to help me.

Let's have a look at what we're going to do today.

Elvis has picked a card with a pictorial representation of cubes.

Let's see what it shows us.

I wonder if you can help me to count out how many cubes we have all together? Well, I can see we've got two groups.

Let's count to check how many cubes we have in our first group.

Let's use your capital counting fingers to help you.

One, two, three, four, five, six, seven, eight, nine, and 10.

The first group of cubes has got 10 in it.

What about the second group of cubes? Let's check by counting.

One, two, three, four, five, six, seven, eight, nine, and 10.

So we've got two groups of 10 cubes.

So I'm going to make my representation of those cubes using my cubes.

Here we are.

So I've got one group of 10 and I've got two groups of 10.

Now, shall we check to see how many cubes we have all together? We can do this by counting out the cubes individually or counting intense.

Let's count them out one by one first of all.

One, two, three, four, five, six, seven, eight, nine, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20.

Two groups of 10 are equal to 20.

10, 20.

So I've made the representation that Elvis has chosen on the picture card.

Now all I need to find the number that matches this representation.

Well, I know that two groups of 10 are equal to 20.

So that must mean that the number card I need to pick is the number 20.

Now it's your turn to have a go.

So with a cool partner, have a go at representing the picture card that they choose for you.

And then how did it go finding the correct number to match that representation.

Once you've had a go, switch over with your partner and when you've both had an attempt, please resume the video.

Now we can also explore counting in tens using a bead string.

So here is my bead string and I have represented some groups of 10 on my bead string.

I wonder if you can tell me how many groups of 10 you can see.

Let's check together.

We've got one group of 10, two groups of 10, three groups of 10.

I wonder if you can tell me how many beads I have all together on my bead string? Maybe you can shout the answer out at the screen.

Well, let's see if you're right.

We can check by counting in tens.

10, 20, 30.

All together, I have got 30 beads on my bead string.

Well, now I'm going to add in another group of 10.

I wonder if you can tell me how many groups of 10 we have now.

Shout the answer out to the screen.

Well, let's see if you're right.

We've got one group of 10, two groups of 10, three groups of 10 and four groups of 10.

All together there are four groups of 10.

How many beads are there all together on the screen? Let's count in tens to find out.

10, 20, 30, 40.

All together there are 40 beads on my bead string.

Now we going to have a look at independent tasks per se.

You are going to need a dice on your bead string to help you have a go.

Now, Old McDonald has got six hens on his farm and every day, a different number of hens lay a certain number of eggs.

Each hen always lays 10 eggs by itself.

Now let's have a look at what we're going to do.

We can start by rolling the dice.

I have rolled the number two.

That means I need to make two groups of 10 on my bead string.

Here we are.

10, and 10.

There we are.

Here, we've got two groups of 10.

One group of 10, two groups of 10.

How many beads do we have all together on our bead string? We can count in tens to find out.

10, 20.

So on this day, the hens on old MacDonald's farm laid 20 eggs.

Let's have one more go together.

We're going to roll the dice.

Up again.

I have rolled the number three this time.

So we're going to make three groups of 10 on our bead string.

Here we go.

One, two and three.

Let's have a look and see.

We've got one group of 10, two groups of 10, and three groups of 10.

All together, that must mean that old McDonald's hens laid 10, 20, 30 eggs on that day.

Now, what I mean, you're going to have a go at the activity.

You're going to need your dice.

You're going to need your bead string and you'll also need activity to worksheet on today's resources.

Have a go at representing each of the numbers of hens eggs using your bead string.

And once you've represented it, cross it off on the worksheet.

Let's see if you can represent each of those groups of tens.

Once you've had a go at the activity, you can resume the video and we'll finish off with our learning for today.

Now to finish off our learning this day, let's have a look at one last problem.

This time there were hens that went out into the field and this time, old McDonald's found 60 eggs.

I've represented those 60 eggs using my bead string.

Should we count them out? 10, 20, 30, 40, 50, 60.

There were 60 eggs in the field.

We need to work out how many hens might've played 60 eggs.

Well, let's have a look carefully, shall we? We know that's on our bead string, beads are arranged into groups of 10.

So perhaps by counting each group of 10 we'll know how many hens might've laid 60 eggs.

Let's start by counting the first group over here.

We've got one group of 10, two groups of 10, three groups of 10, four groups of 10, five groups of 10 and six groups of 10.

That means that six groups of 10 are equal to 60.

That must mean that if each hen lays 10 eggs, there must have been six hens on the field.

Six groups of 10 equals 60.

Great work for today everyone.

Now in less than five, we will be exploring counting in groups of five.

Elvis and I will look forward to seeing you then.

Bye for now.