Mathematics
Grade 6
15 min
Match digital clocks and times
Match digital clocks and times
Tutorial Preview
1
Introduction & Learning Objectives
Learning Objectives
Identify and interpret time displayed on digital clocks.
Differentiate between AM and PM in 12-hour time format.
Convert times between 12-hour (AM/PM) and 24-hour formats.
Accurately match written time descriptions to their corresponding digital clock displays.
Solve word problems involving matching digital times to real-world events.
Recognize and correct common errors when reading or writing digital times.
Ever wondered why some clocks show '15:00' instead of '3:00 PM'? ⏰ Let's unlock the secrets of digital time!
In this lesson, you will learn how to read, interpret, and match different ways of showing time on digital clocks. Understanding digital time is a crucial life skill that helps you stay on schedule and understand sche...
2
Key Concepts & Vocabulary
TermDefinitionExample
Digital ClockA clock that displays time numerically, typically using digits for hours and minutes separated by a colon (e.g., 10:30).A microwave display showing '12:45' is a digital clock.
12-Hour FormatA time system that divides the 24 hours of a day into two 12-hour periods, indicated by AM (ante meridiem) and PM (post meridiem).7:00 AM (morning) and 7:00 PM (evening) are examples of 12-hour format.
AM (Ante Meridiem)Latin for 'before midday'. It refers to the time period from midnight (12:00 AM) up to, but not including, noon (12:00 PM).If your school starts at 8:30 AM, it means 8:30 in the morning.
PM (Post Meridiem)Latin for 'after midday'. It refers to the time period from noon (12:00 PM) up to, but not including, midnight (12:00 A...
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Core Formulas
12-Hour AM/PM Interpretation
AM represents times from 12:00 AM (midnight) to 11:59 AM. PM represents times from 12:00 PM (noon) to 11:59 PM.
Use this rule to correctly identify whether a 12-hour digital time refers to the morning/early afternoon or the afternoon/evening.
Converting PM (1 PM - 11 PM) to 24-Hour Format
To convert a 12-hour PM time (from 1:00 PM to 11:59 PM) to 24-hour format, add 12 to the hour. The minutes remain the same.
$H_{24} = H_{12} + 12$ (for $H_{12} \in [1, 11]$ PM)
This rule helps you change times like 3:00 PM to 15:00. Remember, 12:00 PM (noon) is 12:00 in 24-hour format, and 12:00 AM (midnight) is 00:00.
Converting 24-Hour (13:00 - 23:59) to 12-Hour PM Format
To convert a 24-hour time (from 13:00 to 23:59) to 12-hour PM format, subtract 12...
5 more steps in this tutorial
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Challenging
A baker starts a bread-making process at 21:00. The process takes 5 hours and 30 minutes to complete. What time will the bread be ready, in 12-hour AM/PM format?
A.2:30 PM
B.3:30 AM
C.2:30 AM
D.1:30 AM
Challenging
A 4-hour long documentary starts at 6:00 PM. What time will be displayed on a 24-hour clock when exactly 75% of the documentary has been watched?
A.20:00
B.21:00
C.22:00
D.19:00
Challenging
A handwritten note for a meeting simply says '9:00'. To ensure no one is confused about whether it's morning or evening, which of the following digital time notations is the most clear and unambiguous way to write 'nine o'clock at night'?
A.09:00
B.9:00 PM
C.21:00
D.Both B and C are equally clear and unambiguous.
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