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 five.

In this lesson, we'll focus on relating multiplying by two, to doubling.

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

So let's have a look at today's lesson agenda.

First we'll begin by introducing what's multiplying by two as doubling, then we'll move on to a talk task.

Next you'll practise doubling, and finally you will complete to independent task.

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

And you will need some number cards.

Alternatively, you can ask your parents or carer to cut out some pieces of paper, that you can number in steps.

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

Introducing multiplying by two as doubling.

So, what I would like you to do is have a look at the models on your screen.

Then I would like you to write down the multiplication and the addition equation to represent these models.

And once you're done, I would like you to see on your screen what's the same and what's different.

Do that now.

Great work! So we can see that there are two lots of three, Okay? Which equal to six, and we can also see that here, there are two lots of three, which equal to six.

Okay? Or, we could say that three plus three is equal to six or double three is equal to six.

So, my turn your turn.

Double three is equal to six.

Good job! So the same is that the hole is the same, so both of them are equal six.

And we know that there are two groups of three.

Okay? The difference is that the equations are different.

So we can see that this one is an addition equation and this one is a multiplication equation.

Okay? Good work.

So, what's equation represents these models? What's the same and what's different? So pause the video now and write down your equations.

Great work! What we can see that two lots of four is equal to eight or double four is equal to eight.

My turn your turn.

Double four is equal to eight.

Good work! What's equations represent these models? Again, I would like you to write down your equations, and you tell your screen, what's the same and what's different.

Good work.

Two lots of five is equal to 10, and five plus five is equal to 10, or double five is equal to 10.

So my turn your turn.

Double five is equal to 10.

Good work.

And what equation represents these models? Two lots of six is equal to 12, six plus six is equal to 12.

Or we could say that double six is equal to 12.

My turn, double six is equal to 12.

Your turn.

Good work.

What equation represents these models? Good job.

We can see that two lots of seven is equal to 14, or, double seven is equal to 14.

My turn your turn.

Double seven is equal to 14.

Great work.

So moving on to a talk task.

What I would like you to do is match an array to a bar model, then I would like to find the multiplication equation that matches, and finally, I would like you to say the doubling equation and the multiplication equations out loud.

And once you're finished, we will go through the answers together.

Great work! So you should have had something that looks like this.

So we know that double four, is equal to eight and this bar model represents that because each bar has the value of four, And four multiplied by two is equal to eight.

And here we can see that double six is equal to 12, so six multiply by two is equal to 12.

Good work! Let's play a doubling game.

So, if you haven't already done so I would like you to pause the video now.

And I would like you to get two small pieces of paper and to write the numbers one to 10 on each piece.

Okay? And face them downwards.

Once you're ready, we will continue.

Good work.

So, once you have all your cards facing downwards, what you're going to do is you're going to select a card at random, and then you're going to double that number.

Okay? For example, if I randomly select the card number four let's say, I will say that double four is eight.

Okay? And then I would turn the card back around and then I would choose another card.

Okay? I will go through as many as I can.

It's really important thing to say it out loud.

And once you're ready, we will continue.

Great work! So moving on to independent tasks, that leads is really nice good thing to do.

What I would like you to do, is again turn all your cards facing downwards.

What are you going to do is select a card that you're having And this time you're going to double that number and you're going to write the addition and multiplication equations.

Okay? Until you've turned all of your cards around.

So here's an example, If I randomly select the card number four, I'm going to write that double four is equal to eight or four multiply by two is equal to eight, or two multiply by four is equal to eight.

'Cause I know that multiplication got me to do.

Okay? I will do as many cards as I can until they all turn around and once you're done, we will go through the answers together.

Great! Let's have a look at the answers together.

So if you turned down the card number one, we know that one multiply by two is equal to two.

Okay? Two double two is four.

Double three is six.

Double four is eight.

Double five is 10.

Double of six is 12.

Double seven is 14.

Double eight is 16.

Double nine is 18.

And double 10 is 20.

Difficult? All of that correct, Give yourself a pat on the back.

And you'd like to, please ask your parents or Carer to share your work on Twitter tagging @OakNational and #LearnwithOak And now, it's time for you to complete your of end the lesson quiz.

See you next time.