Lesson video

Hi everyone my name is Miss Sabzvari and I'm really excited you decide to join me today for a math lesson.

The unit we're studying is fractions.

In the previous lesson we focused on identifying halves, thirds, and quarters of shape.

In this lesson we'll focus on identifying fractions of shape with different numerators so when you're ready lets begin.

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

First we'll begin by looking at non-unit fractions.

Next, we'll move onto talk task.

After that we'll look at what's the same and what's different and finally you'll complete your independent task.

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

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

Non-unit fractions Joel ate on part of the chocolate pieces.

What fraction of the chocolate pieces did Joel eat? Pause the video now and tell me what is known and what is unknown.

Great job! So we know that Joel ate one part of the chocolate pieces.

Okay and we know how many pieces are there all together Tell your screen, two good job! And we want to know the fraction of the chocolate pieces that Joel ate.

So, what I would like you to do is to pause the video now and write down the fraction do that now.

Great job! So we know that Joel ate one part of the chocolate pieces, okay.

And there were two pieces all together so we know that the denominator of our fraction is going to be two because there are two parts, okay.

And I knew that my numerator is going to be one because Joel ate one of the two parts.

Good job! So my fraction is one-half.

Great work! So, have a look at the shape on your screen.

How much of the shape is shaded? And how much of the shape is not shaded? So I would like you to come up with two different fractions, one describing how much of the shape is shaded.

And the other describing how much of the shape is not shaded.

So pause the video now and write down your fractions.

Great job! So looking at how much of the shape is shaded.

So, how many parts? How many equal parts are there altogether? Tell your screen.

Four! So the shape has been divided into four equal parts.

So I know that my denominator is going to be four.

That's right! Because there are four equal parts altogether.

And I know that one of those parts has been shaded.

Okay, or highlighted.

Therefore, my numerator is going to be what? So one-quarter of the shape is shaded.

Good job, your turn! My turn, your turn.

One quarter of the shape is shaded, your turn.

Excellent job! So, the fractions which have one as their numerator we call them unit fractions okay and we looked at a few in the previous lesson.

Now, having a look at how much is not shaded, okay.

So, tell your screen what fraction you came up with.

Great job! So let's have a look So first I'm going to draw my vinculum then I'm going to look at how many different parts the shape has been divided into.

So I can see there are four parts so my denominator is four.

And I can see that there are one, two, three parts that are not shaded so my numerator is going to be three, good job! Three-quarters, my turn, your turn.

Three-quarters.

Excellent job! So three quarters of the shape is not shaded.

And this fraction here is a non-unit fraction because the numerator is not one, okay.

Great job! So, lets have a look at this shape.

What I would like you to do is to pause the video and to tell me how much of the shape is shaded and how much is not shaded, do that now.

Great job! So lets have a look at how much of the shape is shaded.

So we can see that this shape is divided into how many equal parts? Great job, into four! So the first thing I'm going to do is draw my vinculum then I'm going to write four as my denominator to show that there are four equal parts and two of those parts I can see are shaded therefore my numerator is going to be two.

So two-quarters of the shape is shaded, your turn.

Excellent job! And looking at how much is not shaded again, I'm going begin by drawing my vinculum and I know there are four equal parts altogether my shape has been divided into four equal parts therefore my denominator is going to be four.

I can see that there are one, two parts which are not shaded, okay, so.

My denominator is four and my numerator is going to be two, that's right! So two quarters of the shape is not shaded, excellent job! Now moving onto a talk task what I would like you to do is to choose a shape a describe how many parts are shaded and then I would like you to describe how many parts are unshaded or not shaded, okay.

So for example lets have a look at this shape, okay.

I would like you to say these sentences as you are doing your task.

There are three equal parts.

One part is shaded - this is one third.

And then I would like you to write down the fraction one third.

Two parts are not shaded - this is two thirds.

And then writing down your fraction and once you're ready we'll go through the answers together.

Great job! So let's have a look at the answers together.

So the first picture we can see that one half is shaded and one half is not shaded, okay good job! The second picture or shape we can see that there are one, two, three, four equal parts okay so my denominator is going to be four and one of those parts is shaded so one-quarter of the shape is shaded.

And three quarters of the shape is not shaded.

Good job if you got that correct! And the last shape we can see that there are one, two, three equal parts so the denominator is going to be three.

And one part is shaded therefore one-third is shaded and two-thirds are not shaded.

So lets have a practise of saying the fractions together.

My turn, your turn.

One-half one-quarter three-quarters one-third two-thirds Great job! So, what's the same and what's different? Lets have a look at these pictures and also their fractions, okay.

What I would like you to do is to pause the video and to tell me what's the same and what's different.

Do that now.

Great job! So we can see that all of these shapes have been split or divided into different parts, okay.

And the fractions are representing how many parts of shaded, okay.

So that's the same and what's different are the denominators and the numerators so for instance we can see that this shape in divided into two so the denominator is two and also this shape has been divided into two so the denominator is two again that's the same, however the numerators are different because this shape only one part has been shaded whereas on this shape can can see two parts have been shaded, okay.

Great job! So lets have a look at our screen.

Do you know the name of this diagram? Tell your screen if you do.

Great job! So this is a Venn diagram okay and what we're going to do is we are going to use this Venn diagram to sort out our shapes and our fractions by looking at their denominators and by looking at their numerators, okay.

But before we do that I would like you to do this the first thing I would like you do to is to pause the video and to draw this Venn diagram on your piece of paper, do that now.

Excellent job! Then what I would like you to do is to write down the fractions of how many parts are shaded for each shape, do that now.

Great job! So, what we're going to do is we are going to sort these fractions and these diagrams into the correct category on the Venn diagram, okay.

So in this part of the Venn diagram the left-hand side we are going to put the fractions of the shapes which have the numerators are greater than one.

So that means more than one part has been highlighted or shaded and this part of the Venn diagram we are going to put the shapes with the fractions of the shapes where the denominator is greater than two.

So what I would like you to do is to pause the video and to tell me.

What do you think this middle section is? Do that now.

Great! So if we find a shape or a fraction which has the numerator which is greater than one and that the denominator is greater than two then we're going to put it in this section here.

Okay, great job! So lets have a little practise together.

So looking at the first shape, okay.

What fraction of the shape is shaded? Tell your screen.

Great job! So we can see that there are four parts one, two, three, four equal parts the denominator is four and three are shaded so three-quarters.

Now three-quarters.

Where am I going to put this shape? Is it going to be here, here or here? Or is it going to be outside the Venn diagram, does it not fit? Point to the screen where you think the shape is going to go.

Great job! So were you correct? So we can see that the shape is divided into four equal groups, okay.

So that means the denominator is going to be greater than two there's going to be definitely in this side, okay.

Now is the numerator larger or greater than one as well? It is, because three parts are shaded! So it matches this description as well as this one therefore we're going to put it in the middle, great job! So have a go at sorting out the rest of the pictures and then we are going to go through the answers together, do that now.

Great job! So lets have a look.

So having a look at this picture here we can see that our shape has been divided into two groups okay, so we know that the denominator is two.

So is it greater than two? No, so its not going to go on this side of our Venn diagram.

However, the numerator which tells use how many parts are highlighted is greater than one because the numerator two.

So therefore its going on this side of our Venn diagram, great work! And looking at this shape here we can see that its been divided into three equal parts okay.

So the denominator is definitely going to be greater than two so its going to definitely fit in this part.

And having a look at the numerator how many parts are highlighted? We can see that two parts are highlighted therefore the numerator is going to be two and two is larger than one, excellent work! So this is going in the middle as well.

And having a look at this shape, this is not in our Venn diagram.

Pause the video now and tell your screen.

Why has this shape been left out? Great job! So we can see that the denominator for this shape is two okay, so is the denominator larger than two? No its two, so it can't go on this side of the Venn diagram and having a look at the numerator, the numerator must be larger than one.

Now is the numerator greater than one? No, because its one therefore it doesn't fit into our Venn diagram so its going to stay outside.

Great work! Lets have a look at our independent task.

What I would like you to do is to identify the fraction for each shape and then I would like you to sort the fraction onto the Venn diagram okay, just like we've been doing so far.

And when you're ready we'll go through the answers together.

Great work! So lets have a look.

The first picture we can see has been divided into four equal parts okay.

So the denominator is definitely larger than two.

The numerator we know that is two because two parts are highlighted okay so the numerator is larger than one.

Therefore it fits into both of the categories so its going to go in the middle.

The next picture we can see again has been divided into four equal parts okay so the denominator is larger or greater than two and the numerator is three and again the numerator is greater than one because three parts are highlighted so three-quarters.

Great job! And our final shape we can see has been divided into two equal parts okay.

So the denominator is two so its not greater than two so it doesn't fit on this side of the Venn diagram.

And if we look at the numerator which is how many parts have been highlighted or shaded again it is one.

So it is not greater than one, therefore our picture does not fit onto our Venn diagram.

Great job if you got all of that correct! You've been working really hard today! And if you'd like to, please ask your parents or carer to share your work on Twitter tagging @OakNational and #LearnwithOak.

And now its time for you to complete your end of lesson quiz.