Bài 2: Units for measuring time

XEM VIDEO TẠI ĐÂY

TRUY CẬP NHANH VÀO LINK TRỰC TIẾP TẠI ĐÂY

https://www.youtube.com/watch?v=yWENh35QT1k

         

Starry, surprise!!! That's a cake getting bit feel. Oh! You can smell it.

But you have to wait for an hour before you eat it.

Why do you keep looking at the clock Starry? Lesson is lengthy of time.

Don’t you know that 60 minutes make an hour?

I understand you have forgotten the time measurement.

Let’s me revise them with you. 
Here is the clock, Starry!

As you know it has  an  hour hand and a minute hand that keep turning twelfth a day, turning on the time.

Now, do you know. How many minutes make an hour, Starry?
 Yes, 60 minutes make an hour.

And how many hours are there in a day, Starry?
 Right, 24 hours make a day.

Q: Starry, if one hour has 60 minutes.
 How many minutes would be there in 2 hours?

Ans: we will have 2 multiply to by 60 which is 120 minutes.

So 2 hours will be equals 120 minutes.

Now, so birthday cake would take  3 hours to bake. How many minutes would that be? let us work it out.

1 hour equals 60 minutes

So 3 hours will be 3 multiply by 60 which is 180 minutes.

The cake would take 180 minutes to bake.

Since we know that 24 hours make one day, Starry.

Let us find out how many hours are there in 2 days?

1 day equals 24 hours.

2 days means 2 multiply by 24 which  is  48 hours.

2 days has 48 hours

Starry, if you are told not to eat a cake for 3 days.

After how many hours would you be able to eat the cake?

It’s too thinking. 
Wait! I’m explain.
How many hours in 3 days?

Now, 1 days equals 24 hours.
3 days means 3 multiply by 24 which is 72 hours.

You will be able to eat the cake 72 hours later. 

Now let revise what we have study.

1 hour has ____ minutes

1 hour has 60 minutes

There are 120 minutes in___ hours

There are 120 minutes in 2 hours

1 day has ___ hours

1 day has 24 hours

4 hours means ___ minutes

4 hours means 240 minutes

There are ___ hours in 2 days

There are 48 hours in 2 days

Now solve these problem.

Q: How many minutes in 5 hours?

Ans: 5 hours equals 5 multiply by 60 which equals 300 minutes

Q: How many hours in 4 days?

Ans: 4 days equals 4 multiply by 24 which is 96 hours

Very good, Starry!
 You have know learn the unit for measuring time.

And now your cake is ready.
You can eat it.
Have fun!

Posted in: