TIME

Types of Clocks

7 : 15

digital clock analog clock

HoursHours

MinutesMinutes

12 hour system1.20pm

12.30pm

2.15pm

7.45am

10.10am

12.00am

a.m– the time after midnight before noon

p.m– the time after noon before midnight

24 hour system

0000 hrs

0200 hrs

1215 hrs

1520 hrs

1700 hrs

2345 hrs

TIME SYSTEM

12 hour system 24 hour system

1.20pm

12.30pm

10.10am

12.00am

0000 hrs

0200 hrs

1215 hrs

2345 hrs

24 hour system

0000 hrs zero hundred hours

0100 hrs zero one hundred hours0200 hrs zero two hundred hours

0300 hrs zero three hundred hours

0400 hrs zero four hundred hours0700 hrs zero seven hundred hours

24 hour system

1000 hrs ten hundred hours

1100 hrs eleven hundred hours

1200 hrs twelve hundred hours

1300 hrs thirteen hundred hours2000 hrs twenty hundred hours

2300 hrs twenty-three hundred hours

How to read time in 24-hour system?

0205 hrsZero two five hours

How to read time in 24-hour system?

0700 hrsZero sevenhundred hours

How to read time in 24-hour system?

1645 hrssixteen forty-five hours

Write the time in words.

0000 hrs Zero hundred hours

0010 hrs Zero Ten hours

0035 hrs Zero Thirty-five hours

0100 hrs Zero One hundred hours

0300 hrs Zero Three hundred hours0435 hrs Zero four thirty-five hours

1900 hrs Nineteen hundred hours

2110 hrs Twenty-one Ten hours2335 hrs Twenty three Thirty-five hours

1515 hrs Fifteen fifteen hours

Write the time in numerals.

zero one fifteen hours =

twenty twenty hours =

seventeen hundred hours =

0115 hrs

2020 hrs

1700 hrs

Textbook

Let’s practise page 1151,2,3,4,5

RELATE and CONVERT TIME

a. Convert the 24-hour system to 12-hour system

b. Convert the 12-hour system to 24-hour system

24 hour system12 hour system

0000 hrs 12.00 a.m

12.59 p.m1259 hrs1.00 p.m1300 hrs

2359 hrs 11.59 p.m

- 12 + 12

Convert time in 24-hour system 12-hour

system

24 hour system12 hour system

1259 12.59pm

1.00pm1300 hrs

noon

- 1200

1625 hrs- 1200

4.25pm

425

Convert time in 12-hour system 24-hour

system

24 hour system12 hour system

1259 12.59pm

1.00pm1300 hrs

noon

+ 121300

9.35pm+ 12

2135

2135 hrs

24 hour system

Identify a.m or p.m0005 hrs

=1001 hrs =1320 hrs

=2301 hrs =0009 hrs =

1240 hrs =

a.ma.mp.mp.ma.mp.m

Convert the time to

12-hour system.0005 hrs

=1001 hrs =1320 hrs

=2301 hrs =0009 hrs =

1240 hrs =

12.05 a.m10.01 a.m1.20 p.m

11.01 p.m12.09 a.m12.40 p.m

A.Convert the following time to the 12-hour system.

0000 hrs =12.00 a.m.

0009 hrs =12.09 a.m.

0105 hrs =0720 hrs =1001 hrs =

1.05 a.m.

7.20 a.m.

10.01 a.m.

1240 hrs =12.40 p.m.

1309 hrs =1.09 p.m.

1415 hrs =1728 hrs =

2301 hrs =

12.15 p.m.

5.28 p.m.

11.01 p.m.

12.05 a.m. =3.15 a.m. =9.30 a.m. =12.20 p.m. =2.01 p.m. =

0005 hrs

0315 hrs

0930 hrs

1220 hrs

1401 hrs

B.Convert the following time to the 24-hour system.

9.15 a.m. =11.39 a.m. =12.35 p.m. =1.40 p.m. =7.55 p.m. =

0915 hrs

1139 hrs

1235 hrs

1340 hrs

1955 hrs

Textbook

Let’s practise page 1181,2,3,4

RELATIONSHIP BETWEEN UNITS of TIME

1 day = 24 hours

1 hour = 60 minutes

1 minute =

60 seconds

1

2hour =30 minutes

1

4hour =15 minutes

3

4hour =45 minutes

1 hour = 60 minutes

1

2hour = 30

minutes

1

4hour = 15

minutes

3

4hour = 45

minutes

1

5hour = x 1 hour

1

5

= 12 minutes

x 60 minutes1

5

2

5hour = x 60 minutes

1

5

= 24 minutes

1

2day = 12 hours