- Hi there.

We're multiplying by two today in the Math Park.

(electric bell rings) (children cheering) (upbeat bright music) - [First Narrator] Get ready for a very special super duper math class.

We're going on a field trip where learning math is tons of fun.

Our destination is the Math Park, with our friends Ranger Riff, Ashley, Charles, Mike, Janet, Kipen, and Matt Dylan.

(upbeat bright music) - Hello, chipmunks.

Welcome to Math Park.

I'm Park Ranger A. Rith Metic, but you can call me Ranger Riff.

Math Park is the place where go rounds are merrier, bars are monkier, and math is always fun.

We're gonna have a grand time.

Today we're gonna learn multiplication at Math Park, and believe me, multiplying can be useful.

Watch this.

(soft piano music) - [First Narrator] This is Maria.

Maria has four friends who love strawberries, and she wants to give each friend two strawberries.

So Maria puts two strawberries in each bowl.

How can we find out how many strawberries there are in the picture?

We could count them or we could use addition.

We could add two plus two plus two plus two.

What does that add up to?

- Did you get eight?

Well, that's grand because that's the correct answer.

You know, adding can be easy, but there's a better way.

Watch this.

(soft piano music.)

- [First Narrator] How many bowls do we see?

That's right.

Four.

And how many strawberries are in each bowl?

There are two.

- So when you're putting things into equal groups, you can multiply to find out how many there are in all.

So what does multiplication mean anyway?

- [First Narrator] Well, Ranger Riff, it's like adding the number two, four times, but instead of saying two plus two plus two plus two, we simply say it and write it as, four times two equals eight.

That's one way of looking at multiplication.

- Multiplication means adding the same number several times.

Now, here's a picture of three faces.

How many eyes are there, not counting mine.

If you said six, you're correct.

Now we could find that by adding two plus two plus two, or we could count each eye one by one, or we can use multiplication.

Now multiplication would mean we look and see we have three faces, that's three sets with two eyes.

Three sets of two each, three times two equals six.

- Did you know that three times two and two times three, both equal six?

Watch this.

- [First Narrator] Two balloons in a group.

Two more balloons in a group.

Two more balloons in a group.

So that's three groups with two balloons in each group.

With multiplication, I think three groups of two is the same as six.

You see, it's like adding two plus two plus two equals six.

Three times two equals six, three groups of two.

(dramatic bright music) - Hey, what happened?

Now, how many groups do we have?

We have two groups, and how many balloons are in each group?

Three balloons in each group.

We could think of it as two groups of three, two times three, or we can think of it as three plus three.

Either way, it still equals six.

- And this works for all multiplication facts.

Five times two is 10.

Two times five is 10.

Eight times two is 16.

Two times eight is 16.

Multiplication is almost like magic.

- Here are two vases with 10 roses in each vase, and because I know my multiplication tables, I can easily find them by saying two times 10 equals 20.

Aren't they pretty?

(sneezes) Too bad, I'm allergic to roses.

- Let's learn more about multiplication.

Now, we're gonna multiply by two.

- [First Narrator] One group of two, one times two is two.

- [Second Narrator] Two groups of two, two times two is four.

- [Third Narrator] Three groups of two, three times two is six.

- [First Narrator] Four groups of two, four times two is eight.

- [Second Narrator] Five groups of two, five times two is 10.

- [Third Narrator] Six groups of two, six times two is twelve.

- [First Narrator] Seven groups of two, seven times two is 14.

- [Second Narrator] Eight groups of two, eight times two, it's 16.

- [Third Narrator] Nine groups of two, nine times two is 18.

- [different narrator] 10 groups of two, 10 times two is 20.

- [First Narrator] Can you say the answer to the next multiplication fact you see before the life guard does?

(clock ticking) - 16!

(people cheering) - I like multiplying by two's because it's so easy.

When I look at the two's table, I noticed that it's all about doubles.

Three times two equals six.

I know that three and three are six.

Seven times two equals 14.

I know that seven and seven are 14.

Nine times two equals 18.

I know that nine and nine are 18.

When you see five times two, it really means five groups of two, but to learn my multiplication tables quickly, I just think of it being like five and five, which equals 10.

- Now let's head over to the multiplication station and visit with our friend, Max, the multiplier.

(fast-paced music) - [First Narrator] From the fun factor satellite in outer space, and the proud product studio in Hollywood, you are watching The Multiplication Station.

- Hey, this is your Multiplication Station.

VJ Max the multiplier.

Today we're multiplying by two.

Check out these multiplication videos.

(upbeat music) (paper crumbling) (vacuum cleaner engine roaring) (aerosol paint spraying) You think you got it?

Are you ready for the Multiplication Station Quicky Quiz?

Let's find out.

- [First Narrator] The multiplication station presents the Quicky Quiz.

(people cheering) - [Third Narrator] Wonderful!

- [First Narrator] See if you can say the products before Charles does.

Ten times two is?

- Twenty.

- [First Narrator] Six times two is?

- Twelve.

- [First Narrator] Five times two is?

- Ten.

- [First Narrator] Eight times two is?

- Sixteen.

- [First Narrator] One times two is?

- Two.

- [First Narrator] Four times two is?

- Eight.

- [First Narrator] Seven times two is?

- Fourteen.

- [First Narrator] Three times two is?

- Six.

- [First Narrator] Nine times two is?

Eighteen.

- [First Narrator] Two times two is?

- Four.

- Multiplying by two!

Hope you did well.

If you miss some, go back and watch the video again.

You'll get there.

See you soon.

(fast-paced upbeat music) - [First Narrator] And now it's time for the multiplication wipe out.

If you've learned the multiplying by two facts, you get to wipe them out.

Here we go.

But we're not done.

Let's look at the three's multiplication table.

We get to wipe out any of the facts we've already learned.

You know that one times three is three, so we can wipe that one out.

Plus we know that three times two is six, and so is two times three.

It's also six, so we can wipe it out.

Here are the fours.

Let's wipe out one times four and two times four.

Here are the fives.

Let's wipe out one times five and two times five.

Here are the sixes.

Let's wipe out one times six and two times six.

- [Second Narrator] Yes.

- [First Narrator] And here are the sevens!

Wipe out one times seven and two times seven, because we already know them.

Here are the eights.

Wipe out one times eight and two times eight.

Here are the nines wipe out one times nine and two times nine.

Disappear!

And here are the tens.

Wipe out one times 10 and two times 10.

I love it.

Next time, we'll be multiplying by 10.

It'll be fun to wipe those out.

(horn honks) - Did you hear that?

That means Math Park is closing for today.

Until Math Park reopens, I salute you math chipmunks.

(children cheering) (upbeat bright music)