Lesson video

Hello, my name's Ms. Jones and I'm going to be teaching maths today.

I thought I'd start with a quick Jake.

Are you ready? Who's the King of the pencil case.

Who do you think, go on whisper to the screen? Should I tell you, the King of the pencil case or a pencil case is the ruler.

Let's start today's lesson today.

We're going to be comparing millilitres and litres using fractions.

Here's the lesson agenda.

We start with the new learning where we thinking about litres and how many litres there are in a millilitre in order to help us solve some problems, later on in the lesson.

This will be followed by a talk task.

Then it will be the 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.

Let's begin I've got some questions for you just to start us off, and we'll be thinking about them in more depth as we go through the lesson.

So have a think about how many millilitres do you think, or might already know that are in one litre.

If you know how many millilitres are in one litre, how many millilitres are in three litres or two litres? Go on, tell me what you already know.

After three, we split to the screen.

Three, two, one.

That's great.

There are 1000 millilitres in one litre.

If I know there are 1000 litre millilitres in a litre, then I know two lots of 1000 would be two litres.

So there would be 2000 millilitres in two litres.

If there are 1000 millilitres in one litre then in three litres, there would be 3000 millilitres.

Let's read some scales on some containers, two star words that I would like to point out are the words, volume, say it back to me by whispering it to this screen of the good.

Great And capacity can you say capacity, safer.

The capacity is how much a container can hold when it is full.

The capacity of this container so the container can hold 1000 millilitres.

The volume is how much liquid it has inside it.

This line here indicates how much liquid is inside.

This container has a volume of 700 millilitres.

What do you think the capacity of this container is? Have a think, go on tells the scree your answer.

You're right.

The capacity of this container is 500 millilitres.

This container has a volume of? Go on tell the screen, great 200 millilitres.

Go on events, give it you time to have a think about the last container.

What is the capacity of the dusk container and what volume of liquid is inside? Now, you've had time to think.

Whisper the capacity and the volume to the screen now.

Super, the capacity of this container is 45 millilitres.

And the volume inside this container is 40 millilitres.

What would 1/4 of 1 litre be? I know that one litre is 1000 millilitres.

I can find 1/4 by finding 1/2 and then finding 1/2 again.

1/2 of 1000 millilitres is 500 millilitres and then 1/2 of 500 is 250 millilitres.

1/4 of one litre is 250 millilitres.

Now it's time for your talk task.

For your talk task today, I would like you to say out loud that 1000 millilitres is equal to one litre.

500 millilitres is equal to 1/2 litre and 250 millilitres is equal to 1/4 of a litre.

An optional task is also to fill up a jug and measuring jug with one litre or to find a bottle that contains one litre.

And to equally share out between four containers, 1/4 of a litre to see that 1/4 of a litre is 250 millilitres.

This task is optional.

Make sure you ask a parent or carer before you do this task so that you can do it safely.

Pause the video, once you complete your talk task.

Here are some pictures of some containers, on each container they are marked with the scale of their capacity.

Here are some questions to match up to each container.

Let's read through them together.

Which container is 1/2 of one litre? Which is 1/4 of one litre? Which is double one litre? Which is 1/2 of two litres? which is 1/2 of 500 millilitres? Pause the video while you match up each question to each container.

Are you ready? Let's go through the answers together.

I know that 1000 millilitres is the same as one litre.

So 1/2 of one litre would be 1/2 of 1000, which is 500 millilitres.

Well 1/4 would be 1000 shared between four parts or I could have my 1/2 of one litre again, and it would be 250 millilitres.

If I know 1000 millilitres is the same as one litre, then double is two lots of 1000, that would be 2000 millilitres.

And then if I know that 1000 millilitres is one litre, I know that two litres is two times two lots of one litre, 1/2 of two litres is one litre, so that means 1000 millilitres is the same as 1/2 of two litres.

Here are some word problems similar to what you'll be doing in your independent task.

Let's read the question together and go through an example together.

There are three 500 millilitre juice cartons.

How much juice is there altogether? Let's look at the information that we already know.

We know that one carton is 500 millilitres.

I haven't got one carton.

I've got three cartons.

So I know that three lots of 500 using my bar model is 1,500 millilitres, which I could also convert into litres because I know 1000 millilitres is a litre.

That's the same as one litre and 1/2, one and 1/2 litres.

Let's have a go at another question.

The garden sprinklers were on for three hours.

They sprayed three litres of water every hour.

How much water was sprayed during the three hours? What information do have, do you know? You know, the sprinklers were on for three hours.

They sprayed three litres of water every hour.

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

Are you ready? Go on, how much water was sprayed during the three hours? Tell the screen now ,super, let's look at it and how we could have answered that question.

Here's the bar model.

They was three litres every hour.

So here's one hour, two hours, three hours.

The total amount sprayed is the whole of the bar model here, which was nine litres.

Did you get it right? Well done.

Now it's time for your independent task.

For your independent task today, you've got some word problems to solve.

Hey, you will be converting the measurements of litres into millilitres.

So it's important to remember that 1000 millilitres is the same as one litre.

Say after me, 1000 millilitres equals one litre.

Go on, say it to the screen.

Great.

Then you've got some word problems you might want to draw like I have some bar models to help you.

Pause the video to complete your task.

Resume once you're finished.

Let's go through the answers.

Three litres is the same as 3000 millilitres.

1/2 a litre is the same as 500 millilitres.

One and a 1/2 litres is the same as 1,500 millilitres.

4,000 millilitres is the same as four litres.

2,500 millilitres is the same as two litres, 500 millilitres.

And 6,000 millilitres is the same as six litres.

David drank seven litres of water in one week.

Peter drank double this amount.

How much water did Peter drink? Where it was two times two lots of seven.

So seven out of seven is 14 litres.

Peter drank 14 litres.

An adult was told to take 20 millilitres of medicine each day.

A child was told to take 1/2 this amount each day.

How much medicine should the child take each day? How much medicine will a child take in one week? If it's 1/2 the amount for a child, 1/2 of 20 millilitres is 10 millilitres.

And if it's one week, the child needs to take 10 millilitres each day.

There were seven days in one week.

So seven lots of 10 is 70 millilitres.

One bucket of water holds one and a 1/2 litres of water.

How much water will two buckets hold? Here's one bucket, and here's the second bucket.

Add these two amounts together, then it is three litres.

Well done on a great lesson.

I hope you have enjoyed it.

And I hope to see you again to see you soon.

Bye.