(playful music) - [Children] Math Mights!

- Hi, kindergarten Math Mights.

My name's Mrs. Gray, and I can't wait to do math with you today.

Today, I have some very fun and exciting activities for us to try.

Today, we are gonna be doing a mystery math mistake, and we're going to be comparing numbers one to 10.

For our mystery math mistake, take a look at all of our Math Mights.

Oh my goodness!

Do you notice, all of our Math Mights are mixed up?

I think we need to help them and solve the mystery math mistake.

For the mystery math mistake, here's how it's gonna work.

We're gonna be given a problem that Dotson figured out, and we're gonna look carefully at how Dotson figured out the answer.

And we're gonna have to agree or disagree to see if Dotson did it right.

If you notice that he did not do it right, that means we found a mystery math mistake, and we're gonna have to help him fix it to make it right.

Look at what Dotson did.

Dotson needs your help.

He was given the number six to build in a 10 frame.

Then he was asked to show it on a counting buddy, but he was asked to show the number that is one less.

Take a look at how Dotson figured that out.

What do you see?

What do you notice?

Did he do it right?

Or do you see a mystery math mistake?

Let's hear from our friend, Sunshine.

Sunshine said that Dotson made seven on his Counting Buddy Junior, but on the 10 frame he had six.

Let's take a closer look at what Sunshine noticed.

So Sunshine said that on his 10 frame, she noticed that he had six dots.

And then she said, she noticed that on the counting buddy it had seven.

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

This is what Dotson had.

He had six on the 10 frame and seven on the counting buddy.

But remember, the question he was supposed to do was to build one less on the counting buddy.

Do you see a mystery math mistake?

Let's hear from our friend Mirah and see what she has to say.

Mirah said that Dotson built one more on his counting buddy instead of one less.

It should have been five.

Let's take a closer look.

So we know that there was six here and originally Dotson had seven.

Hm.

But remember, one less means takeaway.

So if I do it here and I have six, and I take one away to show one less, it would be five.

I think Dotson accidentally did one more, which would have been seven.

But remember, it said do one less.

Let's go back to the counting buddy.

So we're gonna make the counting buddy say six, just like on our 10 frame.

And if we want one less, it means we have to take one away because the beads up by the head, remember, are invisible.

So now we show five.

I think you did it.

Sunshine and Mirah, you had some great observations.

We were able to solve the mystery math mistake and help Dotson see that one last means he needs to take one away.

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

I can compare numbers one to 10.

Take a look at this picture.

Here is a math story.

It's says, Lin collected eight flowers from the garden.

Tyler collected six flowers from the garden.

Did Lin or Tyler collect more flowers?

Hm.

Let's go to our board and take a closer look by building the numbers.

So we know that it said that Lin collected eight flowers and it said that Tyler collected six flowers.

Hm.

I think we should be using one of our math tools to help us.

We're gonna use the Counting Buddy Junior To help us out.

Let's start over here with Lin.

So we're gonna be building the number eight.

To build the number, I'm going to move the beads to his feet.

Remember, any beads by the head we pretend are invisible.

So I know that if I wanted eight, I would do five and then I could do six, seven, eight.

There we go!

Eight.

These beads represent the flowers.

Since I don't have real flowers here with me, we're gonna use the beads to pretend that those are the flowers in the story.

Let's build Tyler's.

So Tyler had six.

So let's build.

Here's the five and one more is six.

Hm.

How can we figure out which has more?

How about we line up the counting buddies and we can see which has more?

Because remember, more means a greater number, so we might be able to tell just by looking.

Let's try it.

So we'll take them and line them up.

If we line up all of our beads to show the flowers, we can see that this one on the top has more because the line is longer than the one on the bottom counting buddy.

That means that Lin had more because eight is more than six.

Eight has more than six.

Awesome job, Math Mights figuring out which has more.

Now I have another math story for you.

This story says, there are nine yellow butterflies and five orange butterflies in the air.

Are there fewer yellow or orange butterflies?

Hm.

I noticed a couple pieces of information in that story.

It told us that there were nine yellow and five orange.

And then did you hear the secret question?

It wants to know which has fewer, not more.

So this time we're gonna be looking for the number that is smaller.

I think we should be using another math tool to help us.

We're gonna use our linking cubes to help build the numbers to see if we can figure out the answer.

Let's take a look.

So there were nine yellow and there were five orange.

I'm gonna build the number nine using my linking cubes.

One, two, three, four, five, six, seven, eight, nine.

These are the nine linking cubes to represent the nine butterflies.

Let's build our orange butterflies.

One, two, three, four, five.

These are five butterflies.

Hm.

Can you tell just by looking?

Let's line up our bars and then we can compare them.

If I line them up so they're at the same place, we can see that the yellow bar is a lot longer than our orange bar.

Remember the secret question, which has fewer?

Do you know?

Yes!

Look at the bars.

The orange bar has fewer because it's smaller than the yellow bar.

That means that there are fewer number of orange butterflies.

Five is smaller than the number nine.

Wonderful job, Math Mights.

You were able to help me figure out which had more and which had less.

Now let's play a game.

Take a look at these two numbers.

which has more?

Hm.

Did you know it right away?

I think we should use our 10 frames to help us build the number so we can really see which had more.

Let's take a look.

So the first number is five.

On our 10 frame, I'm gonna build five using red counters.

One, two, three, four, five.

The next number was eight.

Let's check it.

Here's eight.

Let's use our yellow counters to show eight.

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

Hm, five, eight.

Which has more?

I think you got it.

It's eight.

Take a look.

When looking, the five only filled up the top row of the 10 frame, but the eight filled up the top row and three more.

This one definitely has more.

Eight is more than five.

Great job, Math Mights.

Now we get to play another game to help us with learning about more and less.

This game is called Roll and Record.

And in this game, we're gonna be trying to figure out which number has less.

Remember, less means it will be the smaller number.

Today, our friends, DC and Abracus, are here to play.

Let's take a look at how we play.

First, it will be DC's turn.

He will roll two dice and figure out how many he rolled.

He will then write the number and build it in a 10 frame.

Then it will be Abracus' turn to roll two dice.

He will the number and also build it in the 10 frame.

Then DC and Abracus will work as a team to figure out who rolled the number that had less.

Are you ready for DC's turn?

Let's go!

So DC rolled the dice.

He rolled this number.

Five, six, seven.

DC rolled a seven.

We can build it in the 10 frame.

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

Now it's Abracus' turn.

Roll the dice.

He rolled this number.

We have six, seven, eight, nine, 10.

Abracus rolled 10.

Hey, that means we have to fill up the whole 10 frame.

Now, DC and Abracus are going to look at their 10 frames and figure out who had less.

So if we look here, this one is filled all the way up, but DC's is missing three.

What do you think?

Who had less?

Yes, DC had less, because the three of the boxes on the 10 frame were not filled up, and Abracus is 10 frame was filled all the way up.

That means seven is a smaller number.

So seven is less than 10.

Let's roll the next round.

DC rolled this number.

Six, seven, eight, nine, 10.

I built the number 10 for DC.

Take a look.

Here's 10 all the way filled up.

Now it's Abracus' turn.

Abracus rolled this number, one, two, three, four, five, six, seven, eight.

Abracus rolled eight.

I built eight on the 10 frame.

Take a look.

Here is eight.

So we have 10 and eight.

Which has less?

Did you notice that Abracus had two empty boxes on the 10 frame?

And DC's was filled all the way up.

Did you figure it out?

Abracus had less, because eight is smaller than 10.

Awesome job helping DC and Abracus figure out who had less.

Now it's your turn.

You are gonna get to play the same game that DC and Abracus did.

You're gonna be rolling number with a friend and you have to figure out who has less.

Great job today, Math Mights.

We did our mystery math mistake and we practice comparing numbers.

I hope that you had a great time and I can't wait for you to come back soon.

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- [Child] Changing the way you think about math.

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