Understanding fractions as sets of objects | 3rd grade math (TX TEKS) | Khan Academy

- [Narrator] We are told Iman

and her mom bought the flowers

shown in the picture from the market.

Okay, these are the flowers
here, there's eight of them.

They wanna divide the
flowers equally between them.

Which fraction bar out
of these choices here

represents the number of
flowers each person will have?

So you could pause this video

and have a go at it, and
then we'll do it together.

All right, now let's do it together.

Now, before I even think
about fraction bars

and what that even means,

let's just think about this straight up.

We have eight flowers here.

They're gonna divide them
equally between them.

So half of them could go to Iman

and then the other half
could go to her mom.

All right, that's straight enough.

But that's straightforward enough.

But that's still not fraction bars.

So what do we mean by fraction bars?

Well, one way to think about it

is if we make a bar as the whole.

So let's make this the
whole of all of the flowers.

Now each flower is what
fraction of the whole?

Well, there's a total of eight flowers.

So each flower, for example,
this one right over here,

this is 1/8 of all of the flowers.

So let me take our whole
and divide it into eighths.

So that's dividing it into halves.

This is fourths, I'm trying
to do is equal sections.

It's hand drawn, so it's not perfect.

And then if I split each of
these, this is into eighths.

Imagine that these are all equal areas.

Now, so each of these, this is an eighth.

This is an eighth.

This is an eighth, that's an eighth.

I think you get the
idea, that's an eighth.

Each of these boxes represent an eighth.

If you take them all
together, you have 8/8,

which is a whole, and
that's all of the flowers.

So each of these, that flower there,

you could say that's that eighth,

if you wanna think about it that way.

So they say, which fraction
bar represents the number

of flowers each person will have?

So we could pick either Iman or her mom.

Let's just pick Iman.

So how many of those
eighths does Iman have?

Well, Iman has not just 1/8,

that's one of the flowers.

She has two, three, four flowers.

Two, three, four flowers

So it's actually four of those eighths.

So what Iman has is 4/8
of all of the flowers,

which you might also recognize

as being 1/2 of the flowers.

But which of those fraction
bars represents that?

Well, we see that right over here.

Choice D, they split it into eighths.

Each eighth represents a flower,
and Iman gets half of them,

and they shaded in half
of 'em right over there.

So we like this choice.