​Blocks activity

​Start Time

9:00​

End time

9:03

​3 minutes

​9:00

​9:03

​3 minutes

​Hours

Minutes

3 minutes is the duration

So we add 3 to the minutes

0 + 3 = 3

so the end time is 9:03​

​Hours

Minutes

if an event takes 1 hour to end

So the duration is 1 hour​

So we add 1 to the hours

9 + 1 = 10

so the end time is 10:00​

​start time

End Time

​10: 00

​10:30

​10: 15

​10: 30

12:30 AM

1:30 PM

​now we know how to calculate the duration of an event giving the start time and the end time.

But sometimes, we know the duration but we need to know at what time we FINISH our event​

​Maha invited her friends to her birthday.

She said the birthday starts at 4:00 PM and it is going to take 2 hours to finish​ the celebration.

At what time her friends will be back to their home?​

4:00

2 hours

4 + 2 = 6​

6:00​