I am a time expert

I am a time expert

By Kristyn Gemayel

​Blocks activity

​Start Time

9:00​

End time

9:03

​3 minutes

Time​

Time​

​9:00

​9:03

duration​

​3 minutes

​9:00

​Hours

Minutes

3 minutes is the duration

So we add 3 to the minutes

0 + 3 = 3

so the end time is 9:03​

​9:00

​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​

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​

​

I do -> we do

what is the duration ?​

​start time

End Time

​10: 00

​10:30

​10: 15

​10: 30

12:30 AM

1:30 PM

Multiple Choice

If an event starts at 1:30 PM and ends at 2:00 PM

what is its duration?

• 1 hour

• 30 minutes

• 1 hour and 30 minutes

• 3 hours

​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

start Time​

Duration​

2 hours

End time

4 + 2 = 6​

6:00​

​Situation	​Start time	​Duration	​End Time
Rita wants to go with her mother to the supermarket after the science class. She needs to tell her mother at what time she finishes	​12:00	​35 minutes	​
​Salim's father told him that his body needs to rest for 10 hours of sleeping everyday. he sleeps everyday at 8:00 PM, at what time he wakes up	​8:00	​8 hours	​

You do (group work)

what is the end time ?​