Lesson video

Hello everybody, it's Miss Sidhu here.

Today, we've got some exciting Math but before we start, I wanted to share with you some of the art that I made.

I did some watercolour painting.

As you can see, there are lots of clouds there.

I counted about 16 clouds.

I hope you like my picture.

Now, let's get stuck in with some Maths today.

For Maths, today we are going to solve problems in context.

That means using Math stories, using addition and subtraction.

Now, I wonder what things we'll do today.

This is lesson nine for the topic addition and subtraction.

You will need a paper and a pencil and there are times when you will have to pause the video to have a go at some of the activities yourself.

Now, let's get started.

We are going to look at some of our key vocabulary, that means our star words, identifying if the equation is addition or subtraction.

Choosing a strategy to solve the problem, working out the answer, or which equation we need, an independent task and checking if we've got all of the answers correct.

And finally a quiz to see what we have remembered.

But first, I want you to pause the video to complete the knowledge quiz if you haven't already, and once you've finished, I want to just restart and carry on watching the video.

Here we have our star word, star words.

I'm going to say the star word first and then I want you to say after me Add.

Subtract.

More.

Less.

Make 10.

Dienes.

Cost.

I know we've done the make 10 strategy before.

Let's see if we can remember it.

We're going to be using a make 10 strategy to solve these equations.

So I know we can use our brains as we warm up our brains to solve this brainteaser.

So here we have some addition and subtraction expressions.

Can you use the make 10 strategy to solve these equations? I want you to pause the video.

And have a go.

How did you get on with the questions? So we've got lots of different addition and subtraction equations.

I wonder if you've got the same answers as me.

Let's check them together.

So 18 plus seven is equal to 25.

Let's do the next addition equation 28 add seven is equal to 35.

Super.

18 add six is equal to 24.

Now let's do some subtraction.

24 subtract seven is equal to 17.

34 subtract seven is equal to well done 27 34 subtract six is equal to 28 super, did you get the same answers as I did? You did? Great, that means my make 10 strategy worked.

Super work everybody, I think we're ready for today's exciting lesson to raise money for charity, class MM are making bracelets to sell at their school fair.

I love making bracelets.

Maybe you want to make some bracelets at home.

If you haven't got beads, you might want to use some pasta.

The idea is that everyone gets to make their own bracelets.

But each bead has a separate price.

So we need to make sure we follow the price guidelines.

Let's have a look together.

Here is the price list.

Let's explore it a little.

What is the price of the red bead? Have a look at the price list, can you find the red bead? everybody point to the red bead.

You were super fast.

Can you shout out how much it costs? Super, the red bead costs seven pence.

let's see another question.

Which bead is the most expensive? That means it has the greatest value.

So which bead is the most expensive? Take another look at the price list.

This time you need to check the prices and find out which one has the biggest cost? Now tell me so I can hear.

Can you say a little bit louder? Excellent work, the green bead costs the most.

It's the most expensive, it costs eight pence.

So it's the most expensive on the list.

You are doing some stupid Math today.

Now, we know the cost of the beads.

Now, let's have a go at selling some bracelets.

Here we have our first customer, he would like a bracelet with a green and red bead.

How much would this bracelet cost? The first thing we need to do is check how much each bead costs and write it down.

I'll do this one to show you and then you can help me with some of the other customers.

The first thing we should do is check the beads on the price list.

Here is the price list and it shows me that the red bead costs seven pence well done.

As there are more than one bead on this bracelet, we are going to find the total cost.

That means we have to add the prices together.

That means we need the addition sign.

The green bead costs, let me have a look, John, where's my green bead? Can you point to the green bead on the price list? Let's go across eight p or eight pence.

So we need to add eight pence to the equation.

Okay, so we need to find out the total cost.

What strategies could we use to find out the total cost? How about the make 10 strategy like we used at the beginning of the lesson.

Let's have a look.

So here we have our 10 frame, can you point to the 10 frame? Super, we are going to use this to help us but a lot of the time we could use our head and our fingers to count as well.

Okay, so the first thing we need to do is add seven counters onto our 10 frame to represent the seven pence.

For the red bead, now let's count the seven counters for the seven pence for the red bead.

One, two, three, four, five, six, seven super.

Now we need to add eight green counters for the green bead at eight pence, okay.

So let's start adding one, two, three, I've run out of space on my 10 frames, but I've only done three counters and I need to go all the way to eight.

So that means I've made 10 that leaves us with two options.

We could get another 10 frame and carry on putting the green counters on until we get to eight or we could use another strategy and we can our head and use our fingers to count.

If you want to use the 10 frame, shout out option one.

If you want to count with your head and fingers, shout out option two.

Are you ready, shout it out.

I could hear lots of you shouting out option one it was very close, but I think option one had one.

Maybe the next bracelet we sell, we could use option two where we use our head and our fingers to count.

That way we're using all of our Math knowledge okay, so here is another tens frame.

Now let's carry on counting.

This is where we could use our number skills to help make this quicker.

So one 10 frame already has 10.

Now let's count on the rest.

So we've got lets count on green count just as one two three, four, five, six, seven, eight.

So we've got our 10 frames, and on one 10 frame we've got 10 on the other 10 frame, we've got five.

I know we're so clever with our 10s and ones.

I've got 10 and five ones, 10 and five.

What does 10 plus five equal to 15 well done.

10 plus five is equal to 15.

So that means seven p plus eight p equals 15p.

Super job, that means our first customer needs to pay 15 pence for their bracelet.

What a great start everyone.

Now let's make another bracelet to sell.

Our next customer has requested that means asked for a bracelet with three different colours, well.

Now let's have a look and see what we can come up with.

Can everyone think of a bracelet with three different colours.

Keep them in your minds.

Let's see what comes up.

Is it the same as yours? Let's have a look.

Nice bracelet making everyone.

Here we have a bracelet with a red bead, a green bead and a blue bead.

It might be the same as yours or it might be different.

We need to work out the cost of this bracelet.

Now, we can use the last bracelet to help us.

How much did we sell the last bracelet for with the red and green bead, who can remember? 15p good work, so we know the red bead and the green bead makes 15 pence.

That means we just need to work out how much the blue bead costs and then add it to the 15p for the green and red beads.

Okay, so who can use the price list to help us? So we've got a 15p Plus our the blue bead.

Can you point to the blue bead on the price list? How much does it cost? Can you shout it out? Remember just shout it out so I can hear.

4p did you say? Super, okay, now let's add that to the equation.

Great job, everybody.

So we need to work out 15 pence plus four pence.

I think we should use our head and fingers for this one.

As I know you are so amazing at counting onwards using your fingers.

So let's put 15 pence in our heads and let's count on four fingers.

So 15 in our heads and count on 15, 16, 17, 18, 19.

So this bracelet costs 19 pence.

You're so good with your counting today.

Let's see if you can help me with that challenge.

This time we've got a problem to solve.

And I know you're so good at solving problems. Josh has made this bracelet with four beads, which costs 24 pence.

He no longer wants a yellow bead on the bracelet.

But how do we work out the new cost? Okay, I think you're right.

We need to find out how much the yellow bead costs and that's when we need to take away the yellow bead from 24 pence as that is how much the bracelet costs with all the beads on.

Can you tell me how much the yellow bead is worth? I think you could do it faster and louder.

Super, the yellow bead costs five pence.

Now we need to create a subtraction equation.

I want you to pause the video, have a think about the subtraction equation and then write it down for me.

Okay, let's see how you got along.

Did you get the same as me? Does your equation look like mine? I hope mine is right.

Could you check it for me? Is it correct? It is correct, thank you for helping me.

Okay, so we need to work out what 24 pence subtract five Pence is equal to.

How could we do that? Do you have any idea is amazing I heard someone say a number line.

What a great idea! Yes, we can use a number line to help us, okay.

have a think back remember the first thing we need to do is find the number 24, let's find the number 24.

I love how everybody is pointing to the number 24.

Now, we need to do five jumps because we are subtracting five.

Can you remember which way we need to jump? Is it forwards or backwards? Is it forwards? No, dear it's not forwards.

That must mean it is backwards super thank you everyone for helping me.

We go backwards cause we are subtracting cause remember the numbers are getting smaller and nearer to zero.

Okay, are you ready to jump with me? Let's do our jump so we need to jump backwards five.

Are you ready? One let's do our jumps one, two, three, four, five jumps What number have we landed on? Can you shout it out for me? The number we have landed on is 19.

Well done everybody.

Now we need to write it in our equation 24 pence subtract five pence is equal to 19 pence.

Now I think you're all ready for our independent task.

Here we've got our beads with all the prices on them.

I want you to find out how many different sets of beads can you find that is equal to 20 pence.

Remember, you could only spend 20 pence using all the information we've just used to help you to create different sets of beads that equal to 20 pence.

I hope you enjoy making your bracelets.

you might use a number line to help you.

Here are the answers.

I love all these beautiful colourful beads and all of the bracelets that you have made.

I love that they are equal to 20 pence, well done everybody.

Make sure you check your answers.

You might have put the beads a different way.

That's okay, as long as they add up together to equal to 20 pence, good job.

I hope you had lots of fun creating our bracelets today.

Well done for the learning.

Now I want you to complete your end of lesson quiz to see what you have remembered.

And I will see all of you tomorrow.

Bye.