Lesson video

Hello, my name is Miss Jones, and I'm going to be teaching you maths today.

I'm going to start with a little Joke.

Are you ready? What are 10 things that you can always count on? Go on tell me by whispering to the screen.

Should I tell you? your fingers Let's start today's lesson.

Today we're going to be solving word problems that involve litres.

Here's the lesson agenda.

We start with the New Learning, where we look at the size of containers and their capacity and see how many litres they may hold.

Then there'll be a Talk task followed, by an Independent task, and then finishing off of a Post-quiz.

You will need a pencil and some paper, and you might like to collect some containers from around your house that may hold a litre or more than a litre.

And if you do have a measuring jug that can measure in litres, that may be useful too.

Please make sure you ask a parent or carer first, before you do this, to check it's okay.

Pause the video to collect these items if you haven't done so already, Let's start with our New learning.

Here we have three containers, which container do you think has the greatest capacity and why? Now let's recap capacity means.

Capacity means how much it contains when it is full.

So which one would have the most amount of water if I poured water into each container, which one would hold the most? I'm going to pause to give you time to think.

Are you ready? Can you tell me your answer by whispering to the screen.

Which container has the greatest capacity and why? Interesting, now this container is the tallest.

So we might assume it has the greatest capacity cause it looks the biggest.

This container looks the smallest it is narrow in width as well, but it's not as tall, this one is narrower, but this one isn't as tall.

But then this container, it is the shortest, but it is also the widest.

So you may assume this container here has a greatest capacity because looking at the three containers, it looks the biggest, but we can't always assume just the tallest container would have the greatest capacity.

This container may have the greatest capacity.

Now we're going to look at some containers together that I collected from around my house.

We're going to estimate the capacity of the containers, whether they are they can hold greater than one litre, less than one litre or more than one litre.

First one up is my ice cream tub.

Do you think it can hold greater than one litre, less than or about one litre? estimate that means it's a rough guess, not an accurate measurement.

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

Go on tell me what you think greater than, less than, or the same.

Interesting, I think it roughly holds the same as one litre.

This time I've got my mug.

Does this hold greater than one litre, Less than one litre or one litre? I'm going to pause to give you time to think.

Go on tell me your answer.

I agree, I think it's less than one litre.

Now I've got my lunchbox.

Does my lunchbox hold greater than less than or about one litre? I'm going to pause to give you time to think.

Go on tell me your answer.

I think it holds less than one litre.

Now I have my big salad bowl.

Does my salad bowl hold greater than less than or about one litre? Go on tell me what you think.

Now, this one I'm a bit torn between less than and the same as because it is wide, but it's not very tall, it's very shallow in height.

So I think I'm going to guess it's about estimate it's about the same as one litre.

For your Talk task today, you are going to be estimating and measuring in litres.

Here I have a bowl.

First of all, I'm going to estimate how many litres I think it will hold.

Now looking at it, It's quite a deep bowl, but it's still quite small.

I estimate that my bowl will hold one and a half litres.

Now I'm going to measure, I have my litre jug jug filled all the way to the line that measures for one litre.

I'm going to pour it into my bowl and my bowl still not full to capacity.

So I'm going to fill up my litre jug again to the line measuring one litre, to see if it will fill the bowl to full capacity.

Now my estimate, I was estimating that the bowl would be one and a half litres.

So that would just be half of how much is in my measuring jug.

Let's have a look and see as I pour its still filling up a Lots of water, it's taking all the water.

Now my bowl is full to capacity and it was two litres.

It was two measuring jugs full filled my bowl, so the bowl's full capacity is two litres.

Now it's your turn to investigate capacity.

Step one, fill a big container with water.

Step two, then estimate how many litres of water the container might hold and record the estimate.

Step three, measure the capacity of the container by pouring the water into the one litre jug and record how many litres the container holds.

As you do this say these sentences out loud when you're estimating, I think the container is litres.

And then when you are measuring the container is litres.

Remember to ask your parent or carer to help and supervise you for this task.

Pause the video while you complete your Talk task.

Now let's look at some word problems involving litres.

Let's read this one together.

A restaurant used 15 litres of milk last week and three litres this week.

How many litres of milk did they use altogether? Let's look at the information we already know.

We know that 15 litres of milk was used last week and three litres of milk was used this week.

What we don't know, what we need to find out is, how many litres of milk they used all together? Here we have a bar models that we could use to help us solve this problem.

Here the bar part is 15 litres to represent the milk used last week and this part of the bar is three litres.

and that represents the milk you used this week.

To find the total, we need to add these amounts together, and that tells us that 18 litres of milk was used altogether.

Let's look at another problem.

Read it with me.

Peter made 11 litres of lemonade for a party.

He spilt three litres of it.

How much lemonade did he have left? let's look at the information that we know.

He made 11 litres of lemonade, but he spilt three litres.

What do we need to find out how many litres of lemonade is left? I'm going to pause to see if you can think of what the answer might be.

Have you worked out? Go on whisper to the screen, your answer.

Great, Let's look at it together.

Here we have the bar model and we know the total.

We know that to begin with at the start of the party, there was 11 litres, but three litres was spilled.

So we need to take away three of the bars and we're left with eight, so there was eight litres of lemonade left.

Now it's time for your independent task.

For your independent task today, you've got some word problems similar to the ones we've just solved.

You can use a bar model to help you solve these problems. Pause the video to complete your task resume once you're finished, let's go through the answers.

The first question says, who has the bottle with the most water Struan, Nina or Paul? Well Struan and Nina both have one litre bottles, Whereas Paul has two litres so Paul has the most, Paul bottle is the biggest.

It has the most water.

How much water do Struan and Paul have altogether? Struan has one litre, Paul has two litres together they have three litres.

Sally drank two litres of milk on Monday, used three litres of milk when baking on Tuesday and spilt one litre of milk on Wednesday.

How many litres of milk did Sally use altogether? To find that out, we need to find the total, so we need to add the amounts together.

Here are the bars three litres for when she was baking two litres on Monday that she drank and one litre that she spilled added together is six litres.

Wilmer and his brother had 17 litres of water.

They used eight litres of water to water the plants.

How much water do they have left? They started with 17 litres that's the total they've used eight litres and the last remaining bar tells us how much they had left.

17 take away eight leaves us with nine.

Tess had 35 litres of orange juice in her shop.

Jack had 42 litres in his shop.

How much more orange juice did Jack have than Tess? Here is Jack's amount and here is Tess's amount.

This is how much more, this is the difference between the two amounts and the difference between 42 and 35 is seven litres.

Jack had seven litres more than Tess.

Well done on a great lesson, I hope you've enjoyed it, I certainly have.

Hope to see you again soon.

Bye.