(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 to do so that we can practice learning more about different math skills.

Today, we're going to be doing a mystery math mistake, and we're going to be practicing learning about one more and one less.

Oh my goodness.

All of our Math Might characters have a problem.

They're all mixed up.

DC has Abracus' wand.

All of the math strategies are all mixed up.

I wonder if we can help solve the mystery math mistake and get everything fixed right.

Now to the mystery math mistake.

Here's how it works.

Our friend Dodson was given a problem and he tried to solve the problem.

We're going to see how Dodson solved the problem and we're gonna see if you agree or disagree with how he solved it.

If we disagree, that means there was a mystery math mistake, and we're gonna have to try to solve it.

Let's see what our friend Dodson did.

Dodson was given a picture of some animals.

He had to count the animals.

After he knew how many animals there were, he had to build that number in the 10 frame.

Then he had to write the number to go along with it.

What do you think?

Do you see a mystery math mistake?

Our friend Jameson has an idea.

Jameson said that when he counted the animals, he counted eight.

Let's take a closer look and see if we agree with Jameson.

Here is that group of animals, let's count them.

As I count them, I think I'm gonna put a little dot by them.

That way, I know I counted them.

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

Do you agree with Jameson?

Yes, there were eight animals.

I don't see a mistake yet.

How about we keep going?

So our friend Josiah is also here and Josiah said that he thinks that Dodson needs to add two more counters to his 10 frame does show eight.

Did you see that?

Let's take a closer look at what Dodson did.

Dodson took his number and he built it here in the 10 frame.

He built five on the top and one more.

How many is that?

Yes, Dodson built the number six, but wait a minute.

There were eight animals.

Does that match?

If we had eight animals, how many dots should be in the 10 frame?

That's right, there should be eight.

I think our friend Josiah was on to something.

Let's take a closer look.

So here we already have six built.

Let's see if we can add two more dots, seven, eight.

Now it says eight just like our group of eight animals.

Let's keep going and see if we can find any other mystery math mistakes.

Let's look at this number.

Do you know what number that is?

That's the number six.

Wait a minute, does six match our animals in our 10 frame?

No, you're right.

There's another math mistake.

It should be the number eight.

I think we should just cross it out and let's write the number eight.

So because it's not six, we'll cross it out and we can write the number eight.

Now we have eight animals, eight in the 10 frame and the number eight.

Amazing job Math Mights, you were able to help me find two different mystery math mistakes.

Our friend Dodson would be so proud.

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

I can find one more or one less than a number.

I have a very exciting activity for you today.

Today, we're going to be playing a game called one more or one less.

The way it works is I am going to build a tower by flipping over a number card to know how many to build.

Then I'm gonna give my tower to a friend.

My friend is either gonna make my tower be one more or one less.

Then I will show you the tower and we're gonna see if we can figure out if our new tower is one more or one less than our tower when we started.

Are you ready to build our first tower, let's go.

I have some number cards here.

I'm gonna flip over.

The first number is five.

We're gonna build a tower with five cubes.

One, two, three, four, five.

Our first tower has five cubes.

Now I'm gonna give my tower to a friend and they're gonna change it.

And we're gonna see if we can figure out how they changed it.

When my friend gave the tower back, it looked like this.

What do you think, Math Mights?

Is that tower one more or one less?

Let's take a closer look.

This tower has one, two, three, four.

The tower now has four.

Is four one less or one more than five?

Well, I noticed when I counted to four, I never said the number five, which means we weren't quite there yet.

I think this tower might have one less, let's double check.

So if the tower had four, one, two, three, four, and there was the one missing, that would have been five.

Our new tower four had one less than our original tower with five.

Great job Math Mights.

Let's see if we can do it again.

This time, the number is nine.

We have to build a tower with nine.

Can you count with me as I build?

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

Now our tower has nine.

We have nine blocks on our tower.

I wonder what my friend is going to do.

Do you think it will be one more or one less?

Let's see the tower they gave us.

This is the tower we got back from our friend.

Just by looking at it, I can't tell if it has one more or one less.

What should we do?

Let's start by counting.

As I touch and count, count with me.

One, two, three, four, five, six, seven, eight, nine, 10.

Our new tower has 10 blocks on it.

Is that one more or one less?

Yes, Math Mights, I think you're right.

It is one more.

When I count, I always say nine and after nine is 10, let's take a closer look.

If we look here at our tower, we can pretend that one isn't there and there's our nine that we started with.

And when we put one more, that makes it 10.

10 is one more than nine.

Great job, Math Mights.

You worked so hard on that.

Now I have another activity.

This activity we're gonna be playing Deck o Dot Train Challenge plus one.

Hey, this is just like the Deck o Dot game we've played before.

Remember playing, we're gonna take our yellow deck o dots.

They have 10 frames on them.

When I flip them over, we're gonna decide where they go on the train.

But remember, this is the challenge round.

You are going to put it on the number that is one more than the number you turn over.

Let's get started.

So I'm gonna take my first deck o dot and turn it over.

I flipped over the number four.

Here I have my challenge accountability sheet so I can write down I had four.

Now I have to think what would be plus one?

So if I had four and I had one more dot, that would be five.

That means this card would actually go on the five, because remember this is the plus one challenge.

Let's do the next card.

This card when I flip it, it says the number seven.

So we're gonna write a seven.

Now I have to think what would be plus one?

So if I added one more dot, yes, that would be eight.

So this card goes on the eight.

We're gonna write it on our challenge sheet.

And we're gonna add our five from our first card.

You are gonna keep playing until you use up all of your cards.

Good luck, Math Mights, match them all on the train.

Now we're gonna try another game.

This game is Deck o Dot Challenge take away one.

This game is almost like the one we just played, but instead of doing one more, we are gonna be doing one less.

Are you ready, Math Mights?

Let's flip over our first number.

We flipped over five.

I built the number five on our 10 frame.

Let's see if we can figure out what one less is.

Here is the number five.

One less means I need to take away one.

So if we take one away, there would be four left.

We can fill that out on our accountability sheet.

Five take away one is four.

Let's match our card on to the number four.

Great job, Math Mights.

Let's try the next one.

The next problem I flipped was one.

I built the one on our 10 frame, take a look.

Here's our one.

And if we take one away, there would be zero left.

We can put this on the zero.

Don't forget to do your accountability.

One take away one is zero.

Let's look at our next number.

Our next number is six.

Five on the top and one underneath, that's six.

I built six on our 10 frame, take a look.

Here is six, take away one, that leaves us with five.

This card would go on the five.

If we had six and we take away one, there would be five.

Let's look at our next card.

The next card is this, that's eight.

If we had eight, do you know what one less is, let's look.

Here's our eight, one less, that's seven.

Let's put it on our train.

If we had eight and we take away one, that means there'd be seven.

Let's try the next one.

The next one says three.

Do you know what one less than three is?

Let's take a look.

Here's the number three.

Take away one.

There would be two, match it on our train.

Three take away one is two.

Great job, Math Mights, you were able to help me figure out what one more and one less and complete the challenge.

If you play, you're gonna keep playing until you run out of all of your cards.

Now it's your turn.

You are gonna get to play the Deck o Dot challenge with plus one or take away one.

Great job today, Math Mights.

You helped Dodson figure out the mystery math mistake and we practiced a lot with one more and one less.

I hope that you had a great time learning all the new math with me today and I can't wait for you to come back soon.

(playful music) - [Boy] SIS4teachers.org.

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

- [Woman] The Michigan Learning Channel is made possible with funding from the Michigan Department of Education, the state of Michigan, and by viewers like you.