Lesson Worksheet: Adding and Subtracting Units of Time Mathematics • 5th Grade

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In this worksheet, we will practice how to measure time in hours, minutes, and seconds by using addition and subtraction and use this skill to solve word problems.

Q1:

Determine the difference between 10 hours, 29 minutes, and 8 seconds and 6 hours, 20 minutes, and 30 seconds.

A4 hours, 29 minutes, and 8 seconds
B4 hours, 8 minutes, and 38 seconds
C4 hours
D4 hours, 20 minutes, and 30 seconds
E16 hours

Q2:

The given table shows the time Anthony spends on his morning activities. Calculate the total time it takes Anthony to get ready and arrive at work.

Activity	Getting Ready in the Morning	Walking to the Bus Stop	Riding the Bus to Work	Walking from the Bus Stop to Work
Time	32 minutes	28 minutes	55 minutes	9 minutes

A3 hours
B2 hours
C2 hours and 9 minutes
D2 hours and 4 minutes
E2 hours and 55 minutes

Q3:

Express, in hours, minutes, and seconds, the finishing time of a marathon winner who completed the race in 8,569 seconds.

A and 49 s
B and 19 s
C and 49 s
D and 19 s
E and 26 s

Q4:

Add 11 hours and 34 minutes to 3 hours and 43 minutes.

A15 hours and 43 minutes
B15 hours and 17 minutes
C15 hours
D14 hours
E15 hours and 34 minutes

Q5:

Add 7 hours, 45 minutes, and 15 seconds to 2 hours, 10 minutes, and 33 seconds.

A9 hours, 55 minutes, and 48 seconds
B9 hours
C9 hours, 45 minutes, and 15 seconds
D8 hours
E9 hours, 10 minutes, and 33 seconds

Q6:

Fill in the missing value: There are seconds in days.

Q7:

How many minutes are there in 76 and a half hours?

Q8:

How many seconds are there in 3 hours, 34 minutes, and 10 seconds?

Q9:

Fill in the missing value: hours + 25 minutes = seconds.

Q10:

Fill in the missing value: minutes.

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