Lesson video

Hi everyone, my name is Miss Sabzvari and I'm really excited that you decided to join me today for our maths lesson.

The unit we're studying is multiplication and division.

In the previous lesson, we focused on solving multiplication word problems involving the multiplication table of two.

In this lesson, we'll focus on solving multiplication word problems involving the multiplication table of five.

So when you're ready, let's begin.

Let's have a look at today's lesson agenda.

That we'll begin by looking at our modelling for multiplication word problems. Then we'll move on to a talk task.

Next, you will solve multiplication problems, and finally, you will complete your independent tasks.

Before we begin today's lesson, you will need the following items. You will need something to write with and something to write on.

You will needs some cubes or counters, alternatively you can ask your parent or carer to cut out some small pieces of paper that you can use instead.

And finally, you will need a ruler.

So please pause the video and get their items that you need.

Bar modelling for multiplication word problems. Let's read the word problem together, follow with me.

The school cook is serving broccoli.

She puts five pieces of broccoli on each child's plate.

How many pieces of broccoli will that be on five plates? So the first thing I would like you to do is to pause the video, and to tell your screen what is known and what is unknown.

Great work.

So we know, that there are five pieces of broccoli on each plate.

So we know the value of each part, and we also know how many parts there are.

So we know that there are five plates, five equal parts.

Now, what I would like you to do is to draw your bar model and to write the multiplication equation for the problem.

Then we'll go through the answer together.

Okay, so I know that there are five plates and on each plate there are five pieces of broccoli.

So the first thing I need to do is to draw my bar model and I'm going to split my bar model into five equal groups because our five plates.

Okay, so five equal groups to represent the five plates.

And I knew the value of each part is five because of five pieces of broccoli in each plate.

So I'm going to complete my bar model to show what is known and what is unknown.

I don't know how many pieces of broccoli I'm going to have altogether.

So I knew that five groups of five is equal to 25.

So the cook is going to need 25 pieces of broccoli altogether.

Let's have a look at another question, follow with me.

The school cook is making cakes, each cake needs five eggs.

The cook is making six cakes.

How many eggs does she need? Again, I would like you to pause the video and to tell you a screen what is known and what is unknown.

Great work.

Now, I would like you to draw your bar model and your multiplication question.

Then we'll go through the ups together.

Looking at my next question, I know that the school cook is making cakes and I know that each cake needs a five eggs.

So the value of each part is going to be five and the cook is making six cakes, okay? The first thing I'm going to do, is I'm going to draw my bar model, and going to split my bar into six equal parts.

I have my bar model and I've got one, two, three, four, five, six equal parts that I know that the value of each part is five.

So I'm going to compete by bar model, with all the facts that I know.

And I want to know how many eggs, the cook is going to need in total, okay? So six groups of five is equal to thirty.

Great, let's have a look at our talk task.

What I would like you to do is to read the word problem, then I would like you to create a bar model and find the calculation needed to solve the problem.

And finally, I would like you to solve the problem.

So let's read the word problem together.

Each class gets five oranges in their fruit box each day.

How many oranges would two classes get? Let's have a look at the answer together.

So we know that each class gets five oranges in that fruit box, okay? So the value of each part is five.

We know that there are two classes, therefore, my bar model is going to be split into two equal parts, okay? So two groups of five is equal to ten.

well done if you got that correct.

Solving multiplication problem.

Let's read the question together, follow with me.

Each child gets five carrots at lunchtime.

If there are ten children, how many carrots are needed? Pause the video now, tell your screen what is known and unknown.

Then complete your bar model and your multiplication equation.

So again, the first thing I'm going to do is I'm going to draw bar model and I'm going to section that bar model into 10 equal parts.

I know the value of each part is five, okay? So again, I'm going to label my bar model and I want to work out how many carrots I'm going to need, okay? So 10 groups of five is equal to 50.

Let's look at another question.

Each child gets 10 carrots at lunchtime.

If there are five children, how many carrots are needed? Pause the video now and complete your bar model and your multiplication equation.

Let me go to the next question.

Each child gets 10 carrots at a lunchtime, so I know the value of each part is 10.

And I know that there are five children, how many carrots are needed? The first thing I need to do is draw my bar model and to section my bar model into five equal parts, okay? Great, I know the value of each part is 10, so I'm going to label each part.

And I want to work out the value of the whole, okay? So I know that five groups of 10 is equal to 50.

Great work.

So moving onto your independent task.

What I would like you to do is to solve the word problems using bar modelling.

Let's read the questions together.

There are five tables full in the lunchroom.

If four children fit on a table, how many children are there altogether? And our next question, bananas come in bunches of five.

There are four bunches of bananas in the lunch hall.

How many bananas are there in total? So let's have a look at the answers.

I know that there are five tables in the lunch hall, okay? So I know that my bar model needs to be split into five equal groups or parts.

And I know the value of each part is four because our four children that fits around a table.

So five groups of four is equal to 20.

So I know that there are 20 children altogether.

Good work.

And let's have a look at our next question.

I know that's the bananas comes in bunches of five.

So I know the value of one part is five.

And I know there are four bunches, i know that our bar models needs needs to be split into four equal groups.

So if four groups of five is equal to 20.

There are 20 bananas in total.

If you'd like to, please ask your parent or carer to share your work on Twitter tagging "@OakNational and #LenwithOak".

And now it's time for you to complete two ends of lesson quiz.

See you next time.