Recording a movie

Recording a movie

Pencil and paper
Overview
Connecting to the Curriculum
Marking Student Responses
Working with Students
Further Resources
This task is about adding and subtracting with 24-hour time.

Lisa set her video to record the movie "Men in Black III". The movie started at 9:30 p.m. and ran for 1 hour and 50 minutes.
 

You may show your working out here
a) Write in 24-hour clock time when
 
 
i)
 
ii)
the movie began. __________
 
the movie ended. __________
 
b) Lisa forgot to programme the end time on her video and the tape ran on to its end, 4 hours after she began recording the movie.
 
 
i)
 
ii)

 
Write in 24-hour clock time when the tape stopped. __________
 
How long after the finish of the movie "Men in Black III" was the tape still recording?
 
__________ hours and __________ minutes
   
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Level:
4
Curriculum info: 
Maths, Geometry and Measurement, Measurement
Keywords: 
time, addition, subtraction, 24-hour time
Description of task: 
Students record a movie's start and finish times in 24 hour time, and perform time calculations using them.
Curriculum Links: 
This resource can help to identify students' understanding of working with 24 hour time for the Measurement objectives, and additive strategies for the Number and Algebra objectives.
Learning Progression Frameworks
This resource can provide evidence of learning associated with
Additive thinking, sets 7-8
within the Mathematics Learning Progressions Frameworks.
Read more about the Learning Progressions Frameworks.
Answers/responses: 

 

  

Y8 (06/2000)

1 mark
1 mark

a)

i)
ii)

2130
2320 [Accept a)i) + 1 hour 50 min]

easy
moderate

1 mark
 
 
1 mark
(for both correct)

b)

i)
 
 
ii)

 130 [Accept 130
or a)i) + 4 hour
or a)ii) + 2 hours 10 min]
•   2 hours
•   10 minutes [Accept b)i) - a)ii)]

moderate
 
 
difficult
Diagnostic and formative information: 
 

Common error

Likely reason

a) i)

9:30

Confuses a.m. and p.m.

a) ii)

2280

Does not rename 60 minutes as 1 hour.

b) i)

2530

Does not rename 24 hours as 1 day.