Lesson video

Hello, my name is Miss Jones.

And I'm going to be teaching you math today.

I'm going to start with a Joke.

Are you ready? Why was the equal sign always humble? What do you think? Should I give you a clue? We use the equal sign when we're talking about numbers that are greater than, less than, and equal to other numbers.

Why do you think the equal sign might always be humble? Go and tell me what you think.

Should I tell you the answer? The equal sign is always humble because she knows she is never greater than or less than anyone else.

Let's start today's lesson.

Today we're going to be using number bonds and facts related to 1000.

Here's the lesson agenda.

We start with the new learning where we're looking at ways that we can make the number 1000.

To then later help us with solving problems. Then there'll be a talk task followed by an independent task and then finishing off with a post quiz.

You will need a pencil and some paper for today's lesson.

Please pause the video now and collect these items if you haven't done so already.

How many millilitres are there in one litre? Can you remember? Go on tell me, great job.

There are 1000 millilitres in one litre.

Here I have this represented in a bar model.

My total amount is my one litre which is the same as 1000 millilitres.

And I've shared them into two equal parts.

500 millilitres is one part.

What would the other part be? What do you think? Go and tell me, super.

The part would be 500, 500 millilitres because 500 millilitres added to 500 millilitres totals to 1000 millilitres which is the same as one litre.

We're going to explore using Cuisenaire rods.

All the two-part bonds to 1000.

We know already that one part could be 500 and the other part could be 500.

What could be some other ways that we could make 1000 using two parts? Am going to pause to give you time to think.

Are you ready? Tell me another way that you thought of, great job.

Here are awesome other ways that we can make 1000 We could have one part being 100 the other part would be 900.

We could have one part being 200 and the other part would be 800.

We could have one part being 300 and the other part being 700.

We could have one part being 400 and the other part being 600.

Or we could have one part being 500 and the other thought being 500.

Are there any other two-part bonds you can think of to make 1000? I'm going to pause to give you time to think.

You may want to draw them on your piece of paper.

Are you ready? Let's look at them together.

We could have 600 and 400, which totals to 1000.

We could have 700 and 300, which totals to 1000.

We could have 800 and 200, which total is to 1000.

And we could have 900 and 100, which also takes us to 1000.

If I know that six add four equals 10 then I know that 600 add 400 equals 1000.

If I know that seven add three equals 10 then I know that 700 add 300 equals 1000.

If I know that eight add two equals 10 then I know that 800 add 200 equals 1000.

And if I know that nine add one equals 10, then I know that 900 add 100 equals 1000.

Now it's time for your talk task.

For your talk to us today, you can define all of the three part bonds to 1000.

Remember, draw it out to help you.

As you do this task say this sentence out loud.

I'm going to show you an example.

If I know three, add three, add four equals 10.

Then I know 300 add 300 add 400 equals 1000.

Pause the video while you complete your talk task.

Click resume when you are ready.

Did you find another way that you can make 1000? Go on, tell the screen well done.

As long as your numbers, when you totaled your number bonds added to 10 and then you multiplied them by 100 the amount would equal 1000.

Let's move on to some word problems. Let's read this one together.

Helena drank 250 millilitres of juice.

Bob drank twice as much as, as this.

How much juice did Bob drink? Well, we know that Helena drank one part which is 250 millilitres.

Bob drank twice as much.

So he drank two parts.

We're finding the total.

The parts are the because when we're finding twice with doubling the amount.

So 250 add 250 equals go on, tell the screen.

Well done, 500 millilitres.

Bob drank 500 millilitres.

Here are four children, Graham, Emily, Lauren, and Harry.

Harry drank 600 millilitres of water.

Emily drank half the amount that Harry drank.

Lauren drank some water which was twice as much as how he drank.

Graham drank double the amount that Lauren drank.

How much did everyone drink? Well, the only amount that we've been given is 600 millilitres which is what Harry drank.

So we know that Harry drank 600 millilitres.

Emily drank half the amount.

So if Emily drank half the amount, we would share 600 into two equal parts.

I'm going to pause to give you time to think what the answer might be.

What would one part be of 600 if 600 was the whole.

Are you ready? Go on tell the screen.

Well done, half of 600 would be 300.

So Emily drank 300 millilitres.

How much did Lauren drink? Lauren drank twice as much as Harry.

Well, we know that Harry drank 600 millilitres.

If we're finding twice as much, we're doubling the amount.

So we're finding the whole.

I'm going to pause to give you time to think.

It's getting a little bit tricky now but I know you can do it.

How much did Lauren drink? Tell the screen, great job.

Two lots of 600 millilitres would be 1,200 millilitres.

Now we need to find how much Graham drank.

Graham drank double the amount of Lauren.

So Lauren drank 1,200 millilitres.

So 1,200 millilitres added to another 1,200 millilitres.

I'm going to pause give you time to work out.

Are you ready? Go and tell the screen.

Well done, graham drank 2,400 millilitres.

Now it's time for your independent task.

For your independent task today.

You've got a similar problem to the one we just solved.

Let's read it together.

Rob drank 400 millilitres of milk.

Ian drank some milk, which was half the amount that Rob drank.

Nessa drank twice as much milk as Rob.

Stuart drank half the amount that Ian drank.

How much did everyone else drink? Use bar models to help you solve these problems and then write the amounts that each person drank in the boxes.

Then you've got another word problem.

Let's read it together.

There are three vases with flowers.

Vase a contained 700 millilitres of water.

Vase b contains 300 millilitres less water than vase a.

And vase c contains 100 millilitres more water than vase b.

How much water do vases b and c hold.

Then you have a challenge.

How much water do the three vases have altogether? Can you write your answer in millilitres and then convert it into litres? Remembering that 1000 millilitres is the same as one litre.

Can you say that back to me? Well done, pause the video to complete your task.

Resume once you're finished.

Let's go through the answers.

We know that Rob drank 400 millilitres.

Ian drank half this amount.

So Ian drank 200 millilitres.

Nessa drank twice as much as Rob.

Two lots of 400 is 800 millilitres.

And Stuart drank half the amount that Ian drank Half the amount of Ian is 100 millilitres.

Vase b has 300 millilitres, less water than vase a.

That would be 400 millilitres.

Vase c has 100 millilitres more than vase b.

Vase b has 400, 100 millilitres more would be 500.

Your challenge was to find out how much water all three vases have altogether.

That would be 700 add 400 add 500, which totals to the whole of 1,600.

I know there are 1000 millilitres in a litre.

So if I converted 1,600 into litres, it would be 1.

6 litres.

Well done on a great lesson.

Now it's time for you to complete the quiz.

I hope to see you again soon, bye.