Chapter 10 Math 295
Time on the 24-hour clock is always expressed in four digits. The fi rst
two digits represent the hours, and the second two digits represent the
minutes. A 0 is placed in front of the hours 1 through 9 (01, 02, 03). Do not
use colons to separate hours from minutes. Figure 10.18 shows how the
12-hour clock relates to the 24-hour clock.
Check Your Understanding
Convert the following 12-hour clock times to military time.
1. 1:35 a.m.
2. 3:34 p.m.
3. 7:15 p.m.
4. 10:45 p.m.
5. 9:09 a.m.
Convert the following military times to the 12-hour clock.
6. 2345
7. 1450
8. 0256
9. 1145
10. 0637
Conversion of the 12-Hour Clock to the 24-Hour Clock
12-hour clock 24-hour clock 12-hour clock 24-hour clock
1:00 a.m. 0100 1:00 p.m. 1300
2:00 a.m. 0200 2:00 p.m. 1400
3:00 a.m. 0300 3:00 p.m. 1500
4:00 a.m. 0400 4:00 p.m. 1600
5:00 a.m. 0500 5:00 p.m. 1700
6:00 a.m. 0600 6:00 p.m. 1800
7:00 a.m. 0700 7:00 p.m. 1900
8:00 a.m. 0800 8:00 p.m. 2000
9:00 a.m. 0900 9:00 p.m. 2100
10:00 a.m. 1000 10:00 p.m. 2200
11:00 a.m. 1100 11:00 p.m. 2300
12:00 p.m. 1200 12:00 a.m. 2400
Figure 10.18 Conversion of the 12-hour clock to the 24-hour clock