Lesson video

Hello, my name is Ms. Johns.

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

To start with I've got a quick math joke, are you ready? What did the numbers zero say to the number eight? Go on tell me what you think? The number zero said to the number eight, nice belt.

Let's start today's lesson today.

Today we're going to be solving word problems about capacity and volume.

Here's the lesson agenda.

We start with the new learning, where I look at ways that we solve problems using no number facts, as well as using the bar model.

Then there will be a talk task followed by an independent task, and then finishing off with a post quiz.

You'll 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 start with some questions to help you think about how you might solve these problems and what strategy might be the best one for you.

What do I know about addition and subtraction within 1000? What do I know about fractions? What do I know about measure? I'm going to pause to give you time to think about these questions and how they might help you with today's lesson.

Let's look at a word problem together.

Read it with me.

Squash comes in two litre bottles.

Harry buys seven bottles for his party.

How many litres is that? Let's look at the key information.

The bottles come in two litre containers and Harry buys seven.

That means there are seven parts and each part is two litres.

I can count and twos to find my total amount using my bar model.

Count with me.

Two, four, six, eight, 10, 12, 14.

Great job.

That's 14 litres in total.

I could also work this out by writing a repeated addition number sentence or I could even use my multiplication known facts.

And I know that two times seven also equals 14.

Now it's time for your talk task.

For your talk task today, you're going to match up these bar models to the correct questions here.

Let's read the questions together first.

Tom needs to have a dose of five millilitres once a day for three days.

How much medicine does the doctor need to make for Tom? And then the second question.

Miss Jones's bucket holds 1000 millilitres of water.

Her flowers need 250 millilitres of water a day.

How many days can Miss Jones water her flowers without refilling her bucket? As you match up these questions to the correct bar model, say this sentence out loud.

I know this bar model matches this question because.

pause the video, whilst you complete your talk task.

Click resume when you are ready.

Are you ready? Tell the screen which bar model matches up to which question? Do that now.

Well done.

I know this bar model matches this question because it says there are three days to there are three parts.

Each part is five millilitres.

I know this bar model matches this question because my whole amount is 1000 millilitres.

And I know when I share my 1000 millilitres into parts of 250 millilitres, each part being 250 millilitres, I will have four parts.

Now let's look at solving the questions that we've just seen in the talk task.

Tom needs to have a dose of five millilitres once a day for three days.

How much medicine does the doctor need to make for Tom? Here there's a bar model representing the amount with the three parts and each part is five millilitres.

This is also represented here in a repeated addition number sentence.

I'm going to pause whilst you look at the screen to help you find the answer.

Are you ready? Can you tell the screen your answer? Well done.

Count with me.

We're going to count in fives.

Five, 10, 15.

The doctor needs to make Tom 15 millilitres.

And then the second question.

Miss Jones's bucket holds 1000 millilitres of water.

Her flowers need 250 millilitres of water a day.

How many days can Miss Jones water her flowers without refilling her bucket? Here's a bar model to help you.

Remember, we can only count up in groups of 250 millilitres.

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

Are you ready? Can you tell me the number of days? Well done.

If we add 250 to 250 to 250 to 250, we get a total of 1000 millilitres.

That is one, two, three, four, four days.

How else can we say 1000 millilitres? What other unit could we use? Can you remember? Tell the screen now? Well done.

1000 millilitres is equal to one litre.

Now it's time for your independent task.

For your independent tasks today, you've got some similar questions to the ones we've just looked at together.

You could draw it on your piece of paper bar models to help you.

Don't forget the unit of measure.

Pause the video to complete your task.

Resume once you're finished.

Let's go through the answers.

Billy needs to have a dose of eight millilitres once a day for five days.

How much medicine does the doctor need to make for Billy? Well it's five days, so there are five parts.

Each part is eight millilitres.

Eight added to eight five times, eight lots of five, is 40 millilitres.

Sue has got 30 millilitres of medicine in one bottle.

Her daughter needs to take five millilitres at a time.

How many spoonfuls of medicine can she get from one bottle of medicine? Well I know that my whole is 30 millilitres and each part is five.

If I count in fives to 30, I find that Sue can get six spoonfuls of medicine.

A jar holds 550 millilitres of jam.

Miss Jones uses 50 millilitres of jam every day for her toast.

How many days will the jam in her jam jar last? So I know that I'm using 50 millilitres I need to count him 50s until I get to 550.

And that is 11 days, 11 times.

Miss Jones's teapot holds 1000 millilitres of tea.

Her cup holds 250 millilitres.

How many cups of tea can she pour from one pot of tea? Well again I need to count in 250s until I get to 1000 and that would be four times.

So Miss James will be able to pour four cups of tea from her pot.

I hope you've enjoyed today's lesson.

Now It's time for you to complete your quiz.

Hopefully see you again soon.

Bye.