(playful music) (magical music) (glass squeaking) - [Children] Math Mights!

- Welcome back, Math Mights!

I'm Mrs. Markavich, and I'm so excited that you're here with me today.

Let's check out our plan for the day.

Today, we'll be doing a number talk, and we'll be talking about solid shapes.

Let's warm up our math brain with a number talk.

A number talk is when I give you a problem with an operation that you're already familiar with, and then you're going to try and solve it mentally.

That means without paper and pencil.

And then, you're going to take a turn to share out your strategies on how you solved the problem.

Today, we have one of our Math Mights here to help us out.

I wonder who it'll be?

Let's check it out.

- [Abracus] Abra-cadabra!

- Hey, look who it is.

It's our friend Abracus.

Abracus is sneaky and tricky, because he is magical.

Abracus uses a wand to zap numbers to change them temporarily.

He uses this to help with compensation, and then he zaps them again to change them back to the number that they already were.

Let's see how this is going to work with our friend Abracus.

Here's Abracus with a problem for us, and our problem is 7 + 6.

I wonder if you can think of a way to solve this mentally.

While you're thinking about it, I've set it up on my whiteboard, and Abracus is going to be here to help us.

We're gonna start with seven at the top, one, two, three, four, five, six, seven.

And then on the bottom, we're going to fill in six.

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

I'm wondering how you solved this.

Let's see what my friend Rocco thinks.

Rocco says, "I think the answer is 13.

I know 6 + 6 is 12, but if I added one more, it is 13."

Hmm.

Great thinking, Rocco.

I wonder if you used that strategy.

Let me show you what that looks like on our whiteboard.

Rocco said he knows 6 + 6 = 12, so I think he had Abracus zap the seven on the top and take that away, just temporarily, and now you can see 6 + 6, which is a double, makes 12, and then when Abracus zaps that back, I have seven right there, and I know that 12 add one is 13.

Wow.

That was great thinking, Rocco.

So now here's what we can see.

We know that Abracus zapped one away, making the seven a six, and now we have 6 + 6 = 12.

Then, Abracus zaps that number back in, and gives us 12 + 1 = 13.

That was some great thinking, Rocco.

I wonder, do you think there's another way that we could solve this problem?

Let's check out what my friend Aidan has to say.

Aidan says, "I think the answer is 13.

I know that 7 + 7 is 14, but if I take one away, it is 13."

Ooh, let's take a look at this on my whiteboard, and see exactly what Aidan is talking about.

So you can see that we still have the same equation, 7 + 6 equals hmmm.

We've got seven on top, and then our friend Aidan said that he used Abracus to zap in one more.

And now you can see the double, seven and seven.

Aidan said 7 + 7 = 14, and then when Abracus zaps that back out, the answer is 13, because he took one away.

Now I want to show you what that looks like in a number sentence.

We're going to keep the seven, but remember, this time, Abracus added one, so we're going to say 7 + 7 = 14.

We're going to bring that 14 down, 14 - 1, because we have to zap that number back out of there, will give us the answer of 13.

Boy, first grade Math Mights, I think that Abracus would be so proud of your problem solving, using his strategy and zapping in numbers to temporarily change them.

Let's check out our I can statement of the day.

Our I can statement of the day says I can sort, describe, and create solid shapes.

Let's take a look at these shapes.

I'm wondering which one doesn't belong.

Do you have an idea of what you think doesn't belong?

Look and see what my friends Rocco and Aidan think.

Rocco says "A doesn't belong, because it's the only shape that isn't white."

And Aidan says, "B doesn't belong, because it's the only shape that isn't flat."

Well, let's take a look at mine.

I happen to have them in front of me, and you can see that Rocco said A doesn't belong because it isn't white, and he's right.

It is a different color.

All of the other shapes are white, but shape A is blue.

And Aidan says, "Shape B doesn't belong, because it is the only shape that isn't flat."

And that means that it looks like it's three-dimensional.

You can kind of see some dotted lines here and here that makes it look like it's popping off of the paper.

And so Aidan is right, that one is different than all of the other ones.

I wonder if you think there any more reasons why a couple of these shapes might not belong?

Well, my friend Rocco says, "C doesn't belong because it's the only shape that doesn't have straight lines."

And Aidan says, "D doesn't belong, because it is the only shape that has three sides."

Well, let's take a look at mine again.

You can see that C is a circle, so Rocco is right.

It is the only shape that doesn't have any straight lines.

And then Aidan said, "D doesn't belong, because it is the only shape that has three sides."

And you're right, if we count them, you can see one, two, three, but you can see that shape A has more than three sides, shape B has more than three sides, and shape C is a circle.

Great job, Aidan and Rocco, looking at those shapes and determining which one or more than one may not belong in the group.

Now, let's talk about some solid shapes.

Take a look at the ones that I have here on the screen.

You can see that there are many different shapes here.

I'm wondering if you can sort them by different attributes.

An attribute is the way you might describe a shape.

Maybe it's round, maybe it's square.

Maybe it's tall, maybe it's short.

Let's take a look at the way that my friend Rocco sorted the shapes.

Rocco says, "I sorted my shapes that were flat versus round."

I have that over here on my overhead, and you can see I have a bunch of shapes up here.

Then I have some categories.

I have flat, flat and round, and round.

Whoa, let's see if we can sort them together.

I'm gonna start with one of the shapes.

I have this shape right here, and you can see that it is flat.

There are not any round parts to it.

So I'm going to put that here.

I have another shape and this shape is also flat.

All of the sides are flat on it.

It's going to go here in the flat column.

I have this yellow shape, and when I look at it, you can see that it is round, it has a round face right here.

I'm going to put that as flat and round, because it is flat and it is round.

So it's going to go right here.

I've got another shape that looks like this.

This shape does not have any round parts to it.

It only has flat parts, so we're going to put that in the flat section.

The next shape I have is this one.

This one looks round, almost like the moon up in the sky, and it doesn't have any flat parts.

So you know where that goes, that's going to go in the round category.

The next shape I have is this blue shape.

It kind of looks like this yellow shape.

It is round and it is also flat, so I'm going to put that in flat and round.

This red shape here has all flat sides.

There is nothing about it that has a round spot.

So I'm going to put that in the flat category.

This blue shape has a lot of sides, but none of them are round.

They are all flat, so that one is also going to go in the flat category.

I have two shapes left.

This yellow one here has a round face and a flat face.

So this one is flat and round, so we're going to put it in the flat and round category.

My last shape right here doesn't have any round spots on it at all.

It is all flat, so it is only going in the flat category.

Wow, that was a lot of work and a lot of fun sorting shapes, flat versus round.

Now let's take a look at some solid shapes.

What solid shapes do you see in this image?

To me, it looks like somebody built a bridge with Geoblocks.

Do you see the shape of a bridge?

Let's see what my friend Aidan and Rocco think.

Rocco says, "I see cubes, and I see triangle blocks."

And Aidan says, "I see rectangle blocks."

Let's take a closer look at what I have in front of me.

I have the shapes that looked like the bridge, almost like if you were driving, you would go up here and over the bridge and down the other side.

And you can see that Rocco said, "I see cubes and triangle blocks."

So when I look closer at it, I can see right here, this shape looks like a square, and it's a perfect square, and I know that it's three-dimensional, so it's a cube.

And then, when I look at the top of the bridge, right up here where I see this triangle shape, this is a triangular block.

Our friend Aidan said, "I see a rectangle block."

I see rectangle blocks all over.

I can see a rectangle shape here, I can see a rectangle shape at the top of the bridge, and I can see rectangle shapes on the other side of the bridge.

I just happen to have some Geoblocks so that you can take a closer look at them with me.

Let's take a look.

This here is the rectangle shape.

You can see that I see a rectangle right here and right here.

I'm going to set that here.

This part actually was like maybe right here, or even right here in our bridge.

Here is the cube, and you can see that on a cube, every single side of the cube is exactly the same, and that's the shape that was right here in the middle of our bridge.

The last shape you can see is this triangle block shape, and the triangle is up here at the top of our bridge.

Mine's a little bit smaller than the one in the bridge, but that's okay.

It's still a triangle shape.

And it's on both sides of our bridge, and there's even larger triangle shapes on the sides of our bridge.

Great job of discovering the shapes that were used in the bridge.

Let's see if we can use Geoblocks to make new shapes.

I have a couple of blocks here in front of me.

They are in the shape of a triangle.

I'm going to try to put them together to make a new shape.

Let's see what we can do here.

If I put them together, well, that doesn't really make a shape.

I wonder if I could make a triangle with the two triangles.

Let's try it.

I know that I have to put the sides together.

Hmm.

Oh, look, there it is.

I put two triangles together, and I was able to make a larger triangle.

I wonder if I turn them, if I can make another shape.

Let's try it.

I think if I put them together like this, what shape do you see?

I see a square out of two triangles.

Isn't that neat how you can put Geoblocks together to make new shapes?

I have four cubes in front of me.

I wonder what shape I can make out of them.

If I put them together... Well, this kind of looks like I made some stairsteps.

I really think I need to line up the flat sides to see what I can make.

Let me turn them all like this.

Look at that.

If I have four cubes, and I put them all together with their flat sides lined up, I have another rectangular prism.

But I can also move a couple of them down like this, and now the cubes make a square shape.

I was able to use four cubes and make two completely different shapes out of it.

That was great work, Math Mights!

Now it's your turn to sort solid shapes.

First grade Math Mights, I had so much fun with you today.

We met a new character from Mathville, and his name was Abracus, and we did a number talk with him.

And then we talked about solid shapes.

I think you definitely earned a kiss your brain.

(smooches) until next time, Math Mights!

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