The clock has two hands. The face of a clock is called the dial. The dial is marked with numbers from 1 to 12. The small hand is the hour hand. It shows time in hours. The longer hand is the minute hand. It shows time in minutes.
At 1 o'clock, the hour hand is at 1 and minute hand is at 12. It moves to next number 2 after one hour.
Hour hand takes 12 hours to complete one round.
The minute hand takes 5 minutes to move from one number to the next number in the clock.
The minute hand takes 60 minutes to complete one round on the clock.
How to read a watch or a clock?
The three figures will help us to read a watch or a clock.
Hour hand indicates hours and Minute-hand indicates minutes.
In figure (i) hour-hand is indicating number 1 or just after 1. So, we read it as 1 hour. The minute hand indicates 4 divisions after the number 3, i.e., 3 x 5 + 4 = 19, or 19 divisions from 12. So we read it as 19 minutes.
The watch indicates that the time is 1 hour 19 minutes.
We may express it as 1 : 19.
We may say it is 19 minutes past 1.
At or after the number that the hour-hand indicates, the number expresses the hour.
At or after the number that the minute-hand indicates, the number
multiplied by 5 and number of divisions after the number, express the
minutes. If minute hand indicates 3 divisions after number 7, then
minutes is 7 x 5 + 3 = 38 minutes.
In figure (ii) hour hand is between 3 and 4. So, we say it is 3
hours. The minute hand is 2 divisions after number 8. So, minute is 8 x 5
+ 2 = 42 minutes.
The time is 3 hours 42 minutes.
We may write it as 3 : 42.
We may say it is 42 minutes past 3,
or, (60 - 42 = 18 minutes) 18 minutes to 4.
In figure (iii) expresses 8 : 35 or 35 minutes past 8
or, ( 60 - 35 = 25 minutes) 25 minutes to 9.
Read the time shown in these clocks.
20 minutes past 2 2 : 20 | |
25 minutes to 6 or 35 minutes past 5 5 : 35 | |
Quarter past 10 or 15 minutes past 10 10 : 15 | |
Quarter to 5 or 45 minutes past 4 4 : 45 |
Reading Time to the Minute:
The clock has numbers from 1 to 12 marked on its dial. These numbers divide the clock face into 12 equal parts. Between any two numbers there are 5 small divisions. Each small division represents a minute. So, there are 60 divisions on the dial. The minute hand completes 1 round of the dial in 60 minutes.
Look at the given clock here, the minute hand points to 3 divisions after number 5. It shows that the minute hand has moved 5 × 5 + 3 or 28 minutes. So, the time shown in the given clock is 28 minutes past 3.
For Example:
Write the time shown on the given clock.
The hour hand is between 5 and 6
The minute hand is on the second small division after 8.
So, the minute hand has moved 5 × 8 + 2 = 42 minutes.
The time is 42 minutes past 5.
It is written as 5:42
Reading Time to the Second:
The thin and very long hand on the clock shows the time in seconds. This is called second hand. The second hand moves very fast. The second hand takes only 1 minute to complete 1 round of the dial. The second hand takes 5 seconds to go from one number to the next. If the second hand is at number 4. It means that 4 × 5 or 20 seconds have passed. So, 5 × 12 = 60 seconds 1 minute = 60 seconds.
Read the time in the following picture. Find out at what time Richard wakes up in the morning.
When the minute hand is at 12. We say o'clock.
1 hour = 60 minutes.
Questions and Answers on Read a Watch or a Clock:
I. Circle the a.m. or p.m. as per the given clocks:
(i) |
(ii) |
8 Minutes Past in the Morning (iii) Quarter to 6 in the Evening |
12:47 in the Afternoon (iv) Jogging at 5 O'clock in the Morning |
Answers:
I. (i) a.m.
(ii) p.m.
(iii) p.m.
(iv) a.m.
II. How do you say 10:30 in words?
(i) Half past 30
(ii) Half past 10
(iii) Quarter to 10
(iv) Quarter past 10
Answers:
II. (ii) Half past 10
Related Concepts
● To Measure the Length of a Line-segment
● Examples on Unit of Mass or Weight
● Units for The Measurement of Capacity
● Examples on Measurement of Capacity
● Antemeridian (a.m.) or Postmeridian (p.m.)
● Calendar
● Reading and Interpreting a Calendar
4th Grade Math Activities
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