Lesson video

Hello there.

Miss Brinkworth here, and I will be going through this lesson on multiplication for you today.

So before we get started, I just thought it'd be useful for us to talk about what do you do if you're feeling a little bit angry.

We all feel angry sometimes.

And I wonder if you've got ways of dealing with it.

These are some of the things that I like to do when I'm feeling angry.

Sometimes I feel angry when I've been looking at my phone for too long.

I might've been reading the news or looking at social media.

So I find it's a really good idea to put my phone down, move away from my laptop for a little while, get a little break.

I also find that moving really helps, so I love a run but a walk's really good or a jog, or a skip, whatever makes you happy.

Playing football, having a dance, you can't normally feel angry after that.

Talking to someone, anyone you like, and it doesn't have to be about what's made you angry, just have a chat with someone normally, calm down and have a rest.

We all need to have a little bit of quiet time maybe some time on your own.

So just some ideas there for if you are feeling angry, which happens to all of us.

And it's perfectly normal.

It's really useful to have some ways of dealing with it, though.

Okay.

Let's have a look at our maths for today then.

So we are going to be using, knowing the multiplication facts to derive our eight times tables.

Some people find their eight times table quite tricky.

I'm really hoping that by the end of today's lesson you'll feel much more confident with ways of answering questions involving your eight times table.

You just need a pen or pencil and something to write with.

So, here's our warm-up.

Now if you remember, you can use your three times table to help you with your six times table.

This is because six is double three.

So I've put the three times table up there for you.

Can you try using those facts to answer questions on your six times table? And when you've done it have a look at the answers and see if you can notice any patterns.

Okay, well done, let's have a look at your answers then.

So for four times six, what I can do is I can do four times three.

Now, four times three is twelve.

All I need to do is double twelve to get the answer for four times six.

This is because six is double three, so if I double twelve, I will get my answer for four times six.

Double twelve is 24, well done if you got that.

Again, for eight times six, I can do eight times three, and I can see that eight times three is 24, so if I double 24, I get 48.

And again for twelve times six, I know that twelve times three is 36, and if I double 36, 36 add 36, 36 times two will get me the same answer of 72.

Now what do you notice about those answers? 24, 48, 72? Well, hopefully you can notice that we're adding 24 each time because we've gone four, eight, twelve, and so our answer is being doubled and then added another lot of 24 on at the end as well.

So, 24 times two gives us 48, and then 48 add 24 is 72.

It's because our questions are moving in a clear pattern, so well done if you were able to see that pattern there.

Okay, so we just talked about how our three times table can help us with our six times table, but today's lesson is all about our eights.

What times table do you think we're going to use to help us with our eights? Well, if half of six is three, and that was that relationship, three and six, well, what do you think the number is going to be for our relationship today? It's going to be eight and four.

So we're going to be really focusing today on our four times tables to help us with our eight times tables.

Okay, here are our star words for today.

I'm going to say them, and if you could say them at home, that would be great.

We've got multiplication, factor, commutative, times, equal parts, share, group, division.

Good.

So these are all words that you should recognise around division and multiplication.

So we know that multiplication and division are commutative, they are the inverse of one another.

And so we use a very similar vocabulary when we're talking about both of them.

We're talking about equal parts, we're talking about sharing an amount, we're talking about timesing an amount.

So just put that vocabulary up there for you a second.

Okay, let's move on then and have a go at this.

What do you notice here about these two questions that we've got? Four times two is eight, eight times two is 16, what do you notice here? Well hopefully, you can see that we have doubled the answer.

The eight is there twice, eight and eight is 16, and that's because eight is double four and so our answer is doubled as well.

Now this is our learning for today.

This is making those links between your maths.

You probably feel quite confident with your four times table, one that you've been looking at for quite a long time, and your eights you might find slightly trickier.

So this is just a nice way of using what you already know and applying it to questions that might be new or ones that you find a little bit trickier.

So if you're really confident with your fours, you can double those answers when you get similar questions with your eights.

Let's look at that in a little bit more detail.

Okay, the reason we can do this is because eight is double four.

I'm sure you know that, there's lots of different ways of saying it.

Eight is twice as big as four, four is half of eight, eight is two times greater than 4, four times two is eight, eight divided by two is four.

So this is that relationship that's going to help us out today answering questions on our eight times table.

So, here's that relationship again, we've got our fours going down the side, right and our eights on that hundred square.

Now hopefully you can see if you pick one, like six times four is 24, you can see that 24 doubled is 48, and so six times eight is 48.

And so this is you using what you already know and applying it to some new questions.

Okay, what does this look like then? So if I know that two times four is eight, then I know that two times eight is sixteen.

And I can see that here, I've got my eight, and then I've got eight again.

And eight add eight, eight times two is 16.

So I can double the answer from my four times table to help me with my eight times table.

Okay.

With that explainer, if I know that four times four is 16, what's four times eight, which is being shown there in that bar model.

We've got eight, and four sections on that bar model and each one represents eight.

So what is four times eight? Well, what I can do is take that answer 16 and double it.

And what I like to do first is partition it.

So I've partitioned 16 into ten and six.

And then double it, times it by two.

So, ten times two is 20, six times two is two, add those together and I get the right answer, which is 32.

Let me just explain to you again what I've done there.

I've taken my answer of my known factor, four times four is 16 to answer the question four times eight.

Eight is double four, so I double my answer of 16.

And to double 16, I have split 16 into ten and six.

And then times them separately by two and then pop them back together again to get my answer 32.

Let's have a go at another one.

Here we have six times four is 24, six times four is 24, 24 blocks there, which is six times four.

I want six times eight, so I need to double 24.

Again, I'm going to partition it into tens and ones.

Twenty-four split into tens and ones is 20 and four.

So I need to do 20 times two and four times two to give me 48.

So 20 times two is 40, two times two is 8, 48 is my answer for that one.

And I might not feel quite so confident answering the question six times eight as I do answering the question six times four, but I can use that to help me.

Okay, let's have a go at a word problem then and then it's going to be your turn.

So here we have some packs of cereal.

Year four are going camping and their teacher takes six packs of breakfast cereal which have eight boxes in each.

How many boxes is she taking in total? So let's have a look at the question, we've got six and eight, so we need to do six times eight.

So, like I said with word problems, it's really good to get a picture in your head.

We've got six lots of eight, she's brought six of those packs of cereal, and each one has got eight little boxes in it.

So our question is six times eight, which is 48.

And I know that because six times four is 24 and double 24 is 48.

Right, your go then.

Here we have in September, a head teacher buys seven packs of pencils which contain eight pencils each.

How many pencils does she buy in total? And like I say, with a word problem it's really useful to get a picture in your head.

So I'm going to help you out here.

You've got seven packs of pencils which have eight pencils in each, how many in total? Have a go.

How did you get on? You can see from the picture there she's got quite a lot of pencils.

She's got seven times eight pencils.

Oh, we have a picture there.

So seven times eight is 56.

Well done.

This is one of my favourite number facts, seven times eight is 56, and that's because it goes five, six, seven, eight.

Fifty-six is seven times eight.

Five, six, seven, eight is how I remember that one cause I always get a little bit stuck on it.

I know seven times seven, and I know the ones either side of it, but I get a little bit stuck on seven times eight, so that's a nice way for you to remember it, five, six, seven, eight for that one.

Okay, pause the video here and have a go at your independent task.

Let's have a look at how you got on.

So, hopefully you were able to use your four times tables here to answer these questions.

So eight times eight is 64, ten times eight is 80, 12 times eight is 96, and five times eight is 40.

I know that five times four is 20, so five times eight must be 40.

Okay, we've got that word problem here.

We've got someone who wants to.

Needs to get some new chairs.

So he's got.

needs some more space in his restaurant and he's got the tables but now needs to buy some chairs.

So he's got four large tables, I'm going to get that picture in my head, he's got these four big tables, and he can put eight chairs around each table.

So four times eight is 32, he needs to buy 32 chairs.

Well done if you could see that.

Okay, fill in the gaps then here.

What does eight times by to get 16? It's two.

For 32, well 32 is double 16, so I've got to double what I'm timesing my eight by, so that makes.

made a mistake there, it should say four, not three, it should be four times eight is 32, not three times eight.

My apologies.

Okay, eighty divided by eight is ten, Twenty-four divided by three is two.

Seventy-two divided by nine is eight, and eleven times by eight is 88.

Well done if you got those ones right.

Just to clarify, question two's got the wrong answer there, it should say four.

Okay, and for part B, some more word problems. So getting that picture in your head here will really help you.

So we've got Mr. Slade is looking for prizes to give to his pupils.

In the art shop, the paintbrush is normally 16 pounds but is half price and he decides to buy three.

How much does he spend? Well, half of 16 is eight, so the question is eight times three, which is 24.

Miss Begum decides to buy.

to award eight gold stars to five children for their homework and two for their amazing maths work.

How many does she award in total? Well, five add two is seven, eight times seven is 56, my favourite number fact there again, five, six, seven, eight for that one.

Okay, have a go at your final knowledge quiz and see how much of that's gone in.

Well done everybody, really good work today using your known multiplication facts to help you with your eight times table.

Well done.

Bye bye!.