Answer:

A. Convert each time from 12-hour to 24-hour clock.

1. 7:12 am = 7:12

2. 10:05pm = 22:05

3. 2:43pm = 14:43

4. 5:31 am = 5:31

5. 9:24am = 9:24

6. 11:56pm = 23:56

7. 6:38pm = 18:38

8. 3:00am = 3:00

Step-by-step explanation:

There are two primary methods of showing the time. First there's the 12 hour clock that uses AM and PM, and then there's the 24 hour clock.

12 Hour Clock

The day is split into two 12 hour periods running from midnight to noon (AM hours), and noon to midnight (PM hours).

The abbreviations AM and PM are from Latin:

AM: ante meridiem, before midday

PM: post meridiem, after midday

24 Hour Clock

The day runs from midnight to midnight and is divided into 24 hours from 0 (midnight) to 23. Time is shown in hours and minutes since midnight.

Converting from a 12 Hour to a 24 Hour Clock

Starting from the first hour of the day (12:00 AM or midnight to 12:59 AM), subtract 12 hours:

12:00 AM = 0:00

12:15 AM = 0:15