(upbeat music) Good morning, mathematicians.

- Hi Mrs. Post, welcome to the bake sale.

- Oh, hi, Zoe.

Y'all, it is a beautiful day.

And lucky for me, there's a bake sale at the Rise and Shine school house.

I'm hoping to find a variety of yummy treats because my family's coming to visit.

Hey, would you mind helping me keep up with what I have to spend?

Let's see how much I have.

I've got $10 plus $5 plus $5.

That's $20.

So let's work together today and keep track of the cost of everything.

Hmm.

Oh, these chocolate cupcakes look delicious.

Zoe, how much are these?

- It's $7 for a dozen, so you'll get 12.

- Okay, great.

I'd like to buy a dozen of the chocolate cupcakes.

Mathematicians, let's keep track of this purchase.

$20 minus $7.

That's $13 I'll have left.

- Thank you.

Here you go.

- Okay, great.

I have a $13 left to spend.

Zoe, do you have any recommendations?

- What about the brownies?

- Oh, my brothers love brownies.

And these, they smell so good I can almost taste them.

How much are the brownies?

- It's $5.25 for three.

- Okay, perfect.

I'll take it.

Mathematicians, let's calculate the cost of this purchase.

$13 minus $5.25.

That's $7.75 left.

These smell so good.

Thank you.

$0.75.

Okay.

I have $7.75 left to spend.

I have brownies and cupcakes, but I'd really like one more item.

Hmm.

You know what's missing here?

Cookies.

And my Nana loves oatmeal cookies.

Zoe, do you have oatmeal cookies?

- Yes.

These are $6.50 for a dozen.

- That's great.

I like to buy those.

Okay, mathematicians, let's keep track of this purchase.

$7.75 minus $6.50.

That leaves me with $1.25.

Here you go.

Awesome.

Thank you, Zoe.

I think I'm all set.

I've got cupcakes, brownies and cookies.

And I have $1.25 to spare.

My family is going to love this.

Okay, everyone, we'll see you next time.

Bye.

(upbeat music) Let's go to class.

It's a blast.

You're a great student so we know that you can do it.

Rise and Shine.

Get up off your feet.

Ah, ooo, ooo.

It's time to rise and shine!