Lesson video

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Hi, friends.

It's Miss Molnar here, and we're going to do some maths today.

In today's lesson, we're going to look at combining two parts, but we're also going to include zero, which can make things a little bit tricky, but don't worry, I've brought a friend along to help.

Harold, come on, Harold, we're starting the maths lesson.

I'm so sorry, but Harold's been busy getting into this bowl of grapes here.

My goodness, that's a lot of grapes.

Well, I wonder if these can come in handy for us later on in the lesson, maybe for some counting objects.

We'll see.

All right, now that we're all here and ready, let's see what you need to get ready to make sure that you're ready to start our lesson.

For today's lesson, you will need counting objects.

Now, I might use some grapes today for my counting objects, but make sure you ask your parent or carer first before using food.

You can use anything that is easy to count with and that you have a few of, but make sure again, that you ask a parent or carer.

You'll also need a part whole model.

You can find it in the worksheet resources.

All right, pause the video now, go grab what you need and then come back and we can start our learning together.

All right, let's start by playing Harold's favourite game.

His favourite game to play is "I Spy." Have you played "I Spy" before? I'm sure you've played it before.

Well, the way it works is Harold is going to think of a number and he's going to I spy and see if he can find something in the picture that there are the same number of that he's thinking of.

Okay, so he's going to have a think and he's going to share with me what he's spying.

All right.

Okay.

Harold says, I spy with my little eye, something that there is for of in the picture.

Pause the video and have a close look.

See if you can find an object that there are four of in the picture.

Pause the video and we'll come back and discuss some of the things that we found four of.

All right.

I hope you've had time to pause and look for something in the photo that there are four of.

Let's go over what I found four of.

So I found that there were one, two, three, four white flower bushes in the back.

Did you find that there was four of those? You also could have said that there's one, two, three, four pink flower bushes in the back as well.

That could have been the four that you found.

Was there anything else that you found four of? I spied with my little eye that there were one, two, three, four tables in the picture.

I'm sure there's lots more fours that you might have found as well.

You can pause the video and keep finding some more fours if you want.

But afterwards, we're going to get started on the rest of our lesson.

Okay, we're going to get started on our new.

Harold? Harold.

Harold is busy, again, eating those grapes.

He just loves them.

Well, I guess this could help us with our learning.

So as you can see, Harold really likes red grapes.

Miss Molnar really likes the green grapes.

Maybe we can use that to help us learn to combine two parts.

Let's see if we can learn something using these grapes.

As you can see here, Harold's got his red grapes and Miss Molnar has got her green grapes.

I wonder if we can use them to find out how many grapes the two of us have all together.

So let's count how many Harold has.

He's got one, two, three, four, four red grapes.

Four can be one part.

Let's see how much Miss Molnar has.

One, two, three, three green grapes.

Three is another part.

We're going to use something called a part whole model to help us combine the two amounts to find our whole.

All right, so this is my part whole model.

And I'm going to show first Harold's part, his four grapes.

So in one part we've got one, two, three, four.

Four is one part that represents Harold's amount of grapes.

In the other part, we're going to represent Miss Molnar's amount of grapes.

So Miss Molnar has got one, two and three grapes.

Three is my other part.

Let's see if we can do this without them rolling away.

So there we go.

We have our two parts.

We've got four as a part, three as a part, and now what we need to do is we need to combine them together to find our whole.

So what I need to do is I'm going to take my part four and my part three and I'm going to put them together.

So let's count how many there are all together now to find our whole.

One, two, three, four, five, six, seven.

Four plus three is equal to seven.

So that means that Harold and I, all together, we've got seven grapes left.

I bet those aren't going to last very long with him around.

All right, we're going to try another one.

Let's see if we can see how many grapes Miss Molnar and Harold have all together again.

All right.

So Miss Molnar, remember, is the green grapes.

She's got one, two, three, four, five green grapes.

So that means the five is a part.

Now, Harold has.

Wait a second.

Harold.

Oh, goodness me, Harold has eaten all of his red grapes.

Hm.

So what does this mean when I'm adding to find out how much we have all together? If Harold doesn't have anything for a part, I wonder what's that called.

That's right, it's called zero.

Miss Molnar's got five for her part and Harold's got zero.

Let's see what that looks like on our part whole model.

All right, so remember, Miss Molnar had five green grapes.

So that means I need to put five in one of my parts.

So I've got one, two, hopefully they don't roll away on me, three, four, and five.

Five is apart.

Now, remember we said that Harold doesn't have any red grapes.

So what is that going to represent in my part? What am I going to put inside this part if he doesn't have any red grapes? If you said nothing, well done, you're right.

I don't have another part to add.

I've got zero to add to my part of five.

So I still want to figure out how many we have all together.

I wonder what happens when we add zero to a number.

Let's find out.

So just like last time, I'm going to take my parts and I'm going to add them together.

So I'm going to move them into my whole.

I've got one, two, three, four, five.

And I'm going to add my zero to five.

Do I have any grapes to bring to my whole? No, there's no grapes because zero is part of my number sentence.

So if I add zero to a number, my number is going to stay exactly the same, because I have not added any more grapes.

Let's count to make sure.

One, two, three, four, five.

So I could say five plus zero is equal to five.

Harold didn't have any grapes to add in the end.

Well done, everyone.

Well, it looks like we've run out of grapes now to do our accounting with.

That's okay.

I think we can find something else to help us count.

Silly Harold.

Oh, don't feel too bad, Harold, about eating all of those grapes, because look, we found some more food up on the screen.

This time we want to find out how much fruit there is all together.

How many apples do you see on the screen? That's right, there are two apples.

That means two is one of our parts.

How many bananas do you see on the screen? That's right, there's two bananas.

So two is our other part.

Let's see how we can use our part whole model to help us figure out how many pieces of fruit there are all together.

All right, we're going to represent our parts, our fruit on the part whole model.

Remember we've got our two parts and we've got our whole at the top.

We can also turn our part whole model this way.

And we still have the two parts and our whole here.

It doesn't matter which way we turn it around, it's still a part whole model.

I'm going to use it this way today.

So remember how many apples we had? Two, that's right.

So I'm going to get some cubes as my counting objects to represent them.

Remember, we said you need to ask a parent or carer to ask them about what objects you can use to count for this lesson.

So I'm going to get my two objects to represent my two apples.

So I've got one, two.

Two is a part and it represents my two apples.

Do you remember how many bananas there were? That's right, there were two bananas.

So I'm going to get two cubes to represent them.

One, two.

Two bananas.

So I've got two is a part, two is a part.

Now, we want to combine them together to find our whole.

So I'm going to take my part, which is two, and my other part, which is two, combine them together to get my whole.

Can you count to see how much our whole is? Let's count together to see if you were right.

Well done.

Four is our whole.

Or we have four pieces of fruit all together.

We could also say two plus two is equal to four.

Fantastic learning, everyone.

All right, let's use these sentence stems to help us explain what we just did.

See if you can help me.

Say it out loud together.

There are two apples.

There are two bananas.

The whole is four.

Two plus two is equal to four.

Well done, everyone.

All right.

What we're going to get you to do now is we think that you're ready for a go.

So you're going to pause the video and then we want you to do the exact same.

You need to get your counting objects, you need to get your part whole model, and we want you to try and use these sentence stems to explain you're adding together.

Can you tell us how many of the objects you see? Can you tell us how many each part is? And then can you tell us what the whole is? All right, pause the video, get your materials, and we'll come back together to talk about our learning.

All right.

How did you find that, everyone? Let's go through some of it out loud together.

Let's see if we can say it out loud together.

There are two trees.

There is one nest.

Well done.

So that means the whole is going to be three.

Were you able to show that with your cubes and your part whole model? Well done.

So if we were going to say that in a number sentence, we could say that two plus one is equal to three.

Fantastic effort, everyone.

All right, let's go over to the one with the shirts and the hat.

All right, there is how many hats, everyone? Good.

There is one hat.

There are five shirts.

So that means the whole is going to be six.

One plus five is equal to six.

Way to go, everyone.

All right, you've been getting so good at using the language of part and whole and using your counting objects to combine two groups, that we think that you're ready for your main task.

So what you're going to do is you're going to look at each of these four boxes.

You're going to start with one of them and you're going to combine the two parts to find the whole.

You can use your counting objects, your part whole model, and of course your counting skills to find out how much there is all together.

But there might be a little bit of a trick this time.

Let's start by looking at the box with the apples in it.

Do you see a different part than the apples? I only see apples.

So I know that I'm going to count the apples to be one part.

Hmm.

What is my other part going to be? I'll give you a clue.

Do you remember back to the beginning of the lesson when Miss Molnar was trying to figure out how many grapes she had and how many grapes Harold had all together? Remember, when Howard was a bit cheeky and he ate up all the rest of the grapes.

Remember, there was only Miss Molnar's part to count.

What did we end up calling Harold's part? Zero, that's right.

Okay, I think I've given you enough of a hint now.

So we want you to pause the video, go complete your task, and then we'll come back together and we'll talk about our learning.

All right.

We're going to take a look at this picture, specifically.

So I'm going to represent my two parts and the whole for those pictures of the frogs.

So remember we said there were three frogs, so I'm going to count it with my cubes.

One, two, three.

Three is a part.

So I'm going to put them in this part.

Now, what was our other part? Were there any other animals? No, there were no more animals within that box.

So we know that my other part here is nothing or zero.

I don't have another part to add to the three.

Now I need to figure out how much I have all together in my whole.

So what I need to do is take my parts and add them together.

So three plus zero is equal to? That's right, it's equal to three, because when I add zero to a number, my number will stay the same.

Fantastic job, everyone.

Well, that concludes our learning together today on combining two parts, including zero.

We thought we'd get a little bit tricky there for you today.

Well, we hope you had a great time today and we'd really like it if you took a picture of your learning and shared it with your teacher so they can see all the amazing learning you've done today.

And if you'd like to, you can share your learning with Oak as well, posting onto our social media.

All right, everyone, we hope you enjoy all of the rest of your learning today.

Take care.