Elapsed Time Lesson

Solving Elapsed Time

6 min 20 s

+ 8 min 10 s

Multiple Choice

Kelsey and her family went to a play. The play started at 1:15pm and ended at 3:30pm. How long did the play last?

• 1 hour 15 minutes

• 2 hours 45 minutes

• 1 hour 45 minutes

• 2 hours 15 minutes

8 h 31 min

+7 h 35 min

15 h 66 min

What do you notice about the minutes added together? How many minutes equal an hour?

8 h 31 min

+7 h 35 min

15 h 66 min

- 60 min

15 h 6 min

Why do we need to subtract 60 minutes from the minutes?

8 h 31 min

+7 h 35 min

15 h 66 min

- 60 min

15 h 6 min

+1 h________

The 60 minutes now becomes an hour. Why?

8 h 31 min

+7 h 35 min

15 h 66 min

- 60 min

15 h 6 min

+1 h________

16h 6 min

Multiple Choice

55 min + 10 min =

Make sure your answer is in hours and minutes.

• 6 h 5 min

• 1 h 5 min

• 65 min

• Answer is not here

Multiple Choice

Emma gets to basketball practice at 3:40 pm and practices for 1 hour and 30 minutes. What time is it now?

• 4:00 pm

• 5:00 pm

• 4:10 pm

• 5:10 pm

What is the total time it took this team to run the marathon?

First let's add just the seconds together.

Let's add the seconds column first

56 s

27 s

34 s

03 s

120 s

We need to convert the seconds to minutes.

120

-60 s = 1 min

60

-60 s = 1 min

0

120 s = 2 min

Let's add the minutes column

32 min

42 min

74 min

34 min

108 min

+39 min

147 min

Don't forget to regroup

32 min

42 min

74 min

34 min

108 min

39 min

147 min

+ 2 min is from the seconds

149 min

Now convert the minutes to hours and minutes

149 min

-60 min = 1 h

89 min

-60 min =1 h

29 min

The total time is took this team to run the Boston Marathon was

2 hours 29 minutes.

Multiple Choice

How much time did Gisela spend doing these chores?

• 3 hours 30 minutes

• 3 hours 25 minutes

• 2 hours 5 minutes

• 2 hours 45 minutes