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The 24 Hour Clock | Maths for Kids | Grade 5 | Periwinkle



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the 24-hour clock

hello kids I am Miss Nancy today we will

learn about the 24-hour clock so shall

we begin look at the 24-hour clock

it helps us to know the correct time of

the arrival and departure of trains

planes and long route buses without

confusion of AM or PM

arrival and departure times are usually

stated in the 24-hour clock time

let's understand it in a better way with

an example

Andy is travelling to Delhi

by plane if the departure time of the

plane written on the ticket is 8 o'clock

then Andy will be confused because he

does not know whether the plane will

take off at 8 o clock in the morning or

at 8 o clock in the night

now to avoid this confusion the 24-hour

clock is used

look the plane ticket shows 20 hundred

hours

it means departure time is 8 o clock in

the evening that is 8 p.m.

it starts at zero ours

and ends at 24 hours

four digits are used in the 24-hour

clock as shown

at the end of the four digits we write H

the first two digits show the are

the next two digits show the minutes the

letter H stands for ours

AM or PM is not used

let me show you how to convert the

12-hour clock time to 24-hour clock time

depending on the time intervals the

conversions are carried out as follows

one for the time from 12 midnight to

1250 9 a.m.

subtract 12 from the given time

for example if the given time is 12:35

a.m. then subtract 12 from 12 35 which

gives 30 pi we write it as 0 0 : 3 5 and

we read it as 35 ours

12 midnight will be equal to 12 minus 12

is equal to 0 ours

to the time from 1:00 a.m. to 12:59 p.m.

is written as it is in ours for example

change the time 3:00 a.m. to the 24-hour

clock time

it will be written as 0 3 : 0 0 H it is

read as 300 hours

12:30 p.m. is equal to 1230 ours

three for the time from 1 p.m. to 12:59

p.m. add 12 to the given time

let's see how

change the time 5:00 p.m. to the 24-hour

clock time

plus 5 p.m. is equal to 5 plus 12 which

is equal to 17

we write it as 17 :

0:08 and we read it as 1700 ours

9:35 p.m. will be equal to 9 35 plus 12

is equal to 20 135 hours

now let us see the conversion of 24-hour

clock time to 12-hour clock time even

here depending on the time intervals the

conversions are carried out as follows

one for the time from zero ours

2:59 ours add 1200 ours to the given

time and write it in a.m.

for example if the given time is 15

hours then add 1200 ours to 15 ours

which makes 12:15 a.m.

50 hours will be equal to 50 hours plus

1200 ours is equal to 1250 am

to the time from 100 hours to 1159 ours

is written as it is in am

for example 1125 ours is equal to 11:25

a.m.

115 ours is equal to 115 a.m.

the time from 1200 hours to 1259 ours is

written as it is in p.m.

for example change the time 1245 ours to

12 hour clock time it will be written as

12:45 p.m.

1220 hours is equal to 12 20 p.m.

for for the time from 1300 hours to 2359

ours subtract 1200 hours from the given

time and write it in p.m. let's see how

change the time 2200 hours to the

12-hour clock time 2200 ours is equal to

22 minus 12 which is equal to 10 p.m.

1555 ours is equal to 1555 ours

- 1200 ours is equal to 350 5 p.m.

kids wasn't it fun learning the 24-hour

clock now I want you to try some

examples at home my kids

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