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12.02 Time intervals

Worksheet
Adding and subtracting time
1

Evaluate the following in hours and minutes:

a

11 hours - \, 43 minutes

b

11 hours 16 minutes - \, 5 hours

c

5 hours 10 minutes + \, 20 minutes

d

4 hours 10 minutes - \, 35 minutes

e

3 hours 3 minutes + \, 3 hours 29 minutes

f

3 hours 20 minutes - \, 2 hours 10 minutes

g

2 hours 50 minutes + \, 3 hours 40 minutes

h

6 hours 10 minutes - \, 2 hours 30 minutes

i

7 hours 59 minutes + \, 12 hours 11 minutes

j

10 hours 33 minutes - \, 7 hours 57 minutes

k

10 hours 43 minutes - \, 2 hours 29 minutes

2

How many hours and minutes left until midnight if the time is 16:50?

3

Find the following times, expressing your answer in 24-hour time:

a

4 hours after 16:28

b

7 hours after 22:53

c

12 hours before 9:57

d

13 hours before 10:43

e

30 minutes after 9:30 am.

f

30 minutes after 11:40 pm.

g

9:30 am plus half an hour.

h

7:00 pm plus 24 minutes.

i

45 minutes after 11:20 am.

j

20 minutes after 3:50 pm.

k

10:30 am plus two and a half hours.

l

9:10 pm plus 63 minutes.

4

Find the 24-hour time and day after evaluating the following:

a

Saturday 13:15 - \, 15 hours 18 minutes

b

Thursday 13:20 + \, 21 hours 59 minutes

5

James went to a movie at 11:50 am. The movie went for 1 hour and 10 minutes. What time will be it when the movie finishes? Write your answer using 12-hour time.

6

Sharon starts watching a movie at half past eleven am, which goes for 2 hours and 30 minutes. What time will be it when the movie finishes? Write your answer using 12-hour time.

7

Valentina starts work at 7 am and finishes work at 5:30 in the evening. How many hours and minutes is Valentina at work?

8

A train ride between two cities takes 9 hours and 57 minutes. On a train ride between these cities, if you leave one city at 23:44, at what time will you arrive at the other city? Give your answer in 24-hour time.

9

In a relay of four runners, Karen ran for 1:46, Janet ran for 1:18, Tania ran for 1:16 and Tina ran for 1:42. How long was their total time for the relay?

10

A ship arrives at 17:28 at Melbourne. If the trip took 2 hours and 16 minutes, at what time did the ship depart from Sydney? Express your answer in 24-hour time.

Time between events
11

James leaves home at 2 pm and gets home at 5 pm. How many hours was James out?

12

Luke starts school at 9 am and finishes at 3 pm. How many hours is Luke at school each day?

13

Ellie's family leaves her home at 9:17 am to visit her grandmother in a different state. She arrives at her grandmother's house at 3:17 pm. How long did the trip take?

14

A song clip starts playing at 7:55 pm and finished at 8:11 pm. How long is the song clip in minutes?

15

A taxi departs at 13:32 from Sydney and arrives at 20:14 at Melbourne. How long did the taxi take for the trip?

16

A match of hockey begins at 7:31 and finishes at 8:55. If the half-time break goes for 15 minutes, what is the duration of one half of hockey?

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ACMEM078

calculate time intervals, such as time between, time ahead, time behind

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