Bài 5: Introducing the kilometer

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Starry, do you remember that we use the unit centimeter and millimeter for smaller distances?

But do you know how to measure distances that are really long?

See the distances between your house and the school or the distance between two cities.

You must know that although a meter is a greater unit than centimeter.

We cannot use unit “meter” to measure such long distances.

For this, we have another bigger unit that is the kilometer.

1 kilometer equals 1000 meters.
Kilometer can be written in short as km.

Now let’s learn how to convert kilometers to meters.

Let’s convert 2 kilometers into meters.

Now 1km equals 1000m.

So 2km equals 1000 into 2 which  is 2000

So 2km equals 2000m.
Isn't it easy, Starry?

Let us solve another example.

Q: Convert 6 kilometers into meters.

Ans: 1km equals 1000m.

6km equals 1000 into 6 which is 6000m.

So 6 kilometers equals 6000 meters.

Let’s revise what we have learnt. 

Q: Convert 9 kilometers into meters.

Ans: 1km equals 1000m.

9km equals 1000 into 9 which is 9000m.

So , 9 kilometers equals 9000 meters.

Let’s solve another example.

Q: convert 3 kilometers into meters.

Ans: 1km equals 1000m

3km equals 1000 into 3 which is 3000m

So 3 kilometers equals 3000 meters.

Very good! 
So you must remember that for smaller distances, we use the unit centimeters and meters.

But for longer distances, we use the unit kilometer.     

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