My collection. Revision of numbers from 21 to 100

— Hello, boys and girls! My name is Kyle.

— Hello, everyone! My name is Sophia.

— Hello, friends! I’m Melanie.

— Hello! I’m Jackson.

— Welcome to our lesson! 

— We are happy to see you!

Today in the lesson we will:

● revise the numbers from 21 to 100;

And

● put the knowledge into practice.

Let’s start our lesson!

First of all, look! This is number:

Twenty

For example:

There are twenty windows in this building.

Now look! This is number:

Thirty

For instance:

Linda, you can ask Lora for advice. She has been in the business for thirty years.

Look at the following number!

It’s called:

Forty

For example:

Liam, can you imagine? This well is forty metres deep.

Now look! This is number:

Fifty

For instance:

This river is more than fifty yards wide.

Look! The following number is called:

Sixty

For example:

My grandmother is over sixty years old.

Now look! This number is called:

Seventy

For instance:

This beautiful green dress costs seventy dollars.

Look at the following number!

It’s called:

Eighty

For example:

Boys and girls, look! That deer weights eighty kilograms.

The following number is called:

Ninety

For instance:

Forty plus fifty equals ninety.

Now look! This number is called:

A hundred

For example:

This car park is made for a hundred cars.

Now let’s do the sums.

Look!

If we add 1 to 20, we will get the number 21.

If we add 2 to 20, we will get 22.

If we add 3 to 20, we will get 23.

Now let’s add 4 to 20. The result will be 24.

If we add 5, we will get the number 25.

If we add 6 to 20, we will get 26.

If we add 7, we will get 27.

If we add 8, we will get 28.

And if we add 9 to 20, we will get 29.

Now look!

We can do the same thing with the numbers:

Thirty…

Forty…

Fifty…

Sixty…

Seventy…

Eighty…

And

Ninety…

All these numbers are called “compound numbers”, because they consist of two words.

And… pay attention, please! We need to write all of them using a hyphen.

— Boys and girls, we have revised the numbers from 21 to 100.

— Now we would like to check your knowledge.

Task 1.

Do the sums!

Check yourselves!

Twenty-two plus forty-five is sixty-seven.

Fifty-one minus twenty-four is twenty-seven.

Forty-five plus thirty-six is eighty-one.

Sixty-three plus twenty-seven is ninety.

Seventy-seven minus twenty-eight is forty-nine.

A hundred minus sixty is forty.

Ninety-nine minus forty-nine is fifty.

Thirty-four plus forty-four is seventy-eight.

Well done, boys and girls!

Now do the second task.

Answer the questions!

How many animals are there in the zoo?

Check yourselves!

The right answer is:

There are twenty-two animals in the zoo.

How many fish are there in the ocean?

Let’s check!

The right answer is:

There are thirty-four fish in the ocean.

How many balloons are there in the sky?

Check yourselves!

The right answer is:

There are twenty-six balloons in the sky.

How old is Mrs. Cooper?

Let’s check!

The right answer is:

Mrs. Cooper is sixty-two years old.

Now look at the screen, please!

This is John.

This is Adam.

And this is Mary.

They would like to tell you about their collections.

First, let’s listen to John.

Hello! My name is John.

I’ve got a large collection of coins.

They are from different countries such as Spain, Canada, Italy, China and so on.

There are a hundred coins in my collection.

Collecting coins is interesting!

And it makes me happy!

Now, boys and girls, let’s listen to Adam.

Hello! My name is Adam.

I’ve got a great collection of stamps.

My album has got thirty stamps in it.

They are from different countries.

I like collecting stamps, because they have beautiful pictures.

I’m so proud of my collection!

Now, everyone, let’s listen to Mary.

Hello! My name is Mary.

And I collect different toys.

There are sixty-two toys in my collection.

I’ve got bears, balls, toy soldiers, cars, trains, planes, dolls and so on.

I really like my collection.

I think it’s beautiful!

— Boys and girls, you’ve just listened to John, Adam and Mary.

— Now we would like to check your knowledge.

Task 1.

Match the children with their collections!

Check yourselves!

The right answer is:

One

A toy collection

Two

A coin collection

Three

A stamp collection

Well done, boys and girls!

Now do the second task.

Read and complete the sentences!

Adam has got a … collection. There are … … in it.

Let’s check!

The right answer is:

Adam has got a stamp collection. There are thirty stamps in it.

Mary has got a … collection. There are … … in it.

Check yourselves!

The right answer is:

Mary has got a toy collection. There are sixty-two toys in it.

John has got a … collection. There are … … in it.

Let’s check!

The right answer is:

John has got a coin collection. There are a hundred coins in it.

— Well done, boys and girls!

— Now it’s time to say goodbye to everyone.

— Goodbye, friends!

— Goodbye, boys and girls!

— Goodbye!