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ACARA AC9M8M04, Duration and time zones

Year 8 ยท Measurement

Solve duration problems, including using 12- and 24-hour time across different time zones.

Below are free printable maths worksheets that support AC9M8M04. Print them as PDFs, or generate a fresh one. Every maths answer key is computed in code, so it is never wrong.

Teaching guide

What students learn

Solve duration problems, including using 12- and 24-hour time across different time zones.

How to teach it

Line up 12- and 24-hour time: after midday, add 12 to the hour (1 pm = 13:00); midnight is 00:00, midday is 12:00. Practise converting both directions.

Worked example
Write 14:20 in 12-hour time (with am or pm).
Answer: 2:20 pm
Why: 14 โˆ’ 12 = 2, so pm

Generated and checked in code, so it is correct.

Watch out for

Adding 12 to morning (am) times, and mishandling 12 am (โ†’ 00:00) and 12 pm (stays 12:00).

12 & 24 Hour Time worksheets

All 12 & 24 hour time worksheets โ†’
Make a worksheet for AC9M8M04
More Year 8 Measurement codes: AC9M8M01 ยท AC9M8M02 ยท AC9M8M03 ยท AC9M8M05 ยท AC9M8M06 ยท AC9M8M07
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Australian Curriculum content descriptions (c) ACARA, used under CC BY 4.0. Descriptions are paraphrased. See australiancurriculum.edu.au.