(upbeat music) - [Narrator] Math mights!

- Hi, kindergarten math mights.

I am so excited to do math with you today.

My name's Mrs. Gray, and I can't wait to have some fun.

Today, we are going to be doing a mystery math mistake, and we're going to be doing 10-frames, different ways.

Take a look at the math mights.

Oh my goodness!

All the math mights are mixed up.

They have mixed up all of their math strategies.

Today in our mystery math mistake, I want you to be using your magnifying glass as I solve a problem.

And I want you to see if you can figure out where I might make a mistake in the problem today.

Let's take a look at the mystery math mistake problem.

Today, the problem says, there were four cookies on the tray.

Two more came out of the oven and were put on the tray.

How many cookies are on the tray now?

Let's see if we can do the problem.

Remember, keep an eye out for any mistake.

Let's build it on our mat.

There were four cookies on the tray.

One, two, three, four, then two more cookies came out of the oven.

I'm gonna take two away.

One, two, there were two cookies left on the tray.

Now I'm gonna do my quick draw to match the problem.

There were four cookies on the tray, and two more came out of the oven.

So I'm gonna cross them off, one, two.

Let's see if we can write the number sentence to match my drawing.

Four take away two equals two.

I hope that you were paying close attention.

Did you notice any mistakes?

Hm, let's take a look at what our friend, Jordin and Carly have to say about how I solve the problem.

Jordin, she wonders why that there are less cookies when more were baked.

And Carly thinks that I need to add, not subtract.

So, instead it would be four plus two equals six.

Hmm, they've given me a lot to think about.

What do you think?

Do you think I should add, like Carly said?

I think she might be right, I think I made a mistake.

Instead of adding, I subtracted and took the cookies away, but really more cookies came out of the oven, so this should be an adding problem.

Let's go back to our mat and try again.

And we're gonna build the four cookies.

One, two, three, four, two cookies came out of the oven.

So I'm gonna put two more cookies on.

One, two.

That means that there were six, because four and two equals six.

Let's do our drawing to match.

There were four cookies, and then two more came out of the oven.

Four plus two equals six.

That was our mistake, it should have been an addition problem.

Great job, math mights.

You were really able to help me find the mystery math mistake in the last problem.

Let's take a look at our, I can statement for today.

I can fill 10-frames in different ways.

Take a look at this picture.

On this picture, there are four different pictures, for A, B, C, and D. Which one doesn't belong?

Hm, that's kinda tricky 'cause they all look kinda similar, but I see some differences.

Let's take a look at what our friend Jordin and Carly have to say about which one they think might not belong.

Our friend Jordin said that A doesn't belong.

She said A doesn't belong because it's the only one that does not have 10 counters.

Let's take a look at our math to see exactly what she's saying.

She is saying that here, A doesn't have 10, but B, C and D all do.

Well, that's a good observation.

Let's take a look at what Carly has to say.

Carly said that B doesn't belong.

She said it's the only one that doesn't have red and yellow counters.

Let's take a closer look at what Carly said.

Here, this one on A has red and yellow.

B is only yellow, C has red and yellow, and D has red and yellow.

I see what Carly's saying, but they have some more ideas.

Let's keep going and see what else they have to say.

Our friend, Jordan, now she thinks that maybe C doesn't belong.

She said, it's the only one that has more red counters than the yellow counters.

Let's take a look at her thoughts.

When we look here, here, we have four red and four yellow, so that means those are the same.

Here we have all yellow with no red.

Here we have seven red and three yellow.

So there's more red, and this one has more yellow with six yellow and four red.

I see what she's saying, but let's keep going and see what Carly has to say.

Carly now says that maybe letter D doesn't belong, D is the only one that's not a 10-frame.

Let's take a closer look at her thoughts.

So looking at D, D is the only one that's not a 10-frame, so D is the one that does not belong.

Now, if we look at the five frames, we can see that there are still 10 dots in the two five frames, and they're broken up in different ways.

Now, we're gonna play a game.

This game is called 10-frame shake.

To play this game, I'm going to be using a 10-frame mat, my recording sheet, some red and yellow counters, and a red and yellow marker.

Let's go.

So we're gonna take our cup that has 10 chips in it.

I'm gonna shake, shake and dump them out.

After I dump them out, I'm going to arrange them on my 10-frame.

All I'm gonna do is look for all of the yellows.

I'm gonna lay them out.

And now I'm gonna put in all of the red.

On the recording sheet, I'm going to color in to match the 10-frame.

So I have seven yellow, and there are three red.

Now let's see if we can write the number sentence to match the drawing.

We had seven yellow plus three red, and that equal 10.

Now remember, when we do a number bond, it's taking the two numbers and showing how they come together.

Let's do it.

It's seven and three.

And when you put them together, it makes 10.

Let's put it in our number bond.

There was seven yellow and three red.

And when we put them together, it made 10.

That is one way that we can make 10.

Now we're gonna do it again, and see if we find another way that we can make 10 using different numbers.

Shake, shake, shake, give it a nice dump.

And then we're going to be arranging it on our 10-frame.

So I'm gonna take all of the yellows and move them up top, and then to the bottom.

And then I'm gonna fill in the reds.

Now let's go to the recording sheet and color in the 10-frame so it will match what came out of our cup.

There were eight yellow, and there were two red, one, two.

Now, if we write out our number sentence, we're gonna write eight plus two.

Eight plus two equals 10.

I know that eight and two, put them together, that makes 10.

Let's put it in our number bond.

Eight and two, put them together, that makes 10.

Wow, we're having so much fun.

Are you ready to try again?

Let's see if we find another way to make 10.

Shake, shake, shake, and we're gonna give them a spill.

And now we have to arrange it onto the 10-frame.

Let's start with yellow again.

Fill in all the yellow, and then we're gonna take all of the red.

Let's color it in on our recording sheet, there were four yellow, and there were six red.

Let's color it in.

Now, we're gonna try to make that number sentence.

Can you help me?

There were four yellow plus six red, and that equal 10.

You know how to do this, let's do it.

Four plus six equals 10.

Let's put it in the number bond.

Four and six, put them together, that makes 10.

Wow, kindergarten math mights, I had so much fun playing 10-frame shake.

I hope you did too.

And if you try to play it again, remember, you don't have to use red and yellow counters like I did, you just need something that has two different sides, like a penny, you could use that to play 10-frame shake.

Now, I want you to take a look at this 10-frame.

How many counters are needed to fill the frame?

Let's take a closer look down on my mat.

So on my 10-frame, there are seven counters, and I noticed that there are three empty boxes.

Well, if I wanted to fill in the 10-frame, I could fill it in by adding three more counters.

I'm gonna make those counters yellow, so we can clearly see the two different numbers.

Let's try it.

So we're gonna fill in the 10-frame with the yellow, and now I have seven red and three yellow.

Take a look over here.

There are three different equations.

Do you see which one would match my 10-frame?

Let's take a look and see if we can find it.

The first one says 10 equals seven plus three.

Hey, wait a minute, I think that one matches, because there were seven red and three yellow.

That must be our equation, seven plus three.

You did a great job, finding the equation to help me fill that 10-frame.

Let's try another one.

How many counters do I need to fill the frame?

Well, there are four red.

And here there's one empty box, and five empty boxes on the bottom.

Well, I know that five and one more is six.

That means we need six counters.

Let's count them out as I put them in.

And remember, I'm gonna make them yellow, so we can see the two different numbers.

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

Now I wonder if we can find the equation that matches the 10-frame.

Let's try.

The first equation says 10 equals one plus nine.

Hm, I don't think that one's it, because we didn't use the numbers one and nine to fill the frame.

Let's keep going.

The next equation says 10 equals eight plus two.

I don't think that one's right either, we didn't use eight and two.

Let's try the last one and hope that that's the right one.

10 equals four plus six.

Hey, wait a minute, there were four red and six yellow.

That's it, our equation is four plus six.

That matched the 10-frame.

Now it's your turn.

You are gonna get to play the 10-frame shaking that we played today.

Remember, you don't have to use red and yellow counters, those pennies would work great for the game.

You guys worked so hard with me today.

We were able to figure out the mistake in that math mystery problem, and we were able to learn about filling 10-frames.

We can make 10, so many different ways.

I hope that you guys had a great time with me today, and I can't wait for you to come back, and I'll see you soon.

(upbeat music) - [Narrator] Sis4teachers.org, changing the way you think about math.

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