Chapter 15 Time And Temperature Worksheet Page 11
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TIME AND TEMPERATURE (Chapter 15)
FOUR DIGIT NOTATION
7:15
7:15 am appears as
and is written as 0715 hours.
20:15
8:15 pm appears as
and is written as 2015 hours.
In the following examples we compare 12-hour time and 24-hour time.
24
12-hour time
24-hour time
-hour time always
Digital display
4
uses
digits.
0:00
0000 hours
midnight
7:42
7:42 am
0742 hours
12:00
1200 hours
midday (noon)
2 3: 29
11:29 pm
2329 hours
Example 8
Self Tutor
Convert 7:38 am into 24-hour time.
a
17:38
into 12-hour time.
b
Convert the digital display
7:38 am is 0738 hours
a
17:38 is 5:38 pm
b
EXERCISE 15D
Write as 24-hour time:
1
3:13 am
11:17 am
12:47 pm
a
b
c
midnight
d
5:41 pm
8:19 pm
11:59 pm
e
f
g
h
noon
Write the following 24-hour times as 12-hour times:
2
0300 hours
0630 hours
1800 hours
1200 hours
a
b
c
d
0615 hours
1545 hours
2017 hours
2348 hours
e
f
g
h
Write the following analogue times as 24-hour times:
3
a
b
c
morning
afternoon
evening
What, if anything, is wrong with the following 24-hour times:
4
0862 hours
0713 hours
2541 hours?
a
b
c
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