Video Transcript
Reading Clocks: Time to the Quarter
Hour
In this video, we will learn how to
tell time to the quarter hour on both digital and analog clocks. Here are four clocks. We call this type of clock with a
face and two hands an analog clock. The longest of the two hands on the
clock is called the minute hand. When the minute hand is pointing at
number three, we know it’s quarter past. When the minute hand points to
number six, we know it’s half past the hour. When the minute hand is pointing at
nine, we know it’s quarter to. And when the minute hand points to
number 12, we know it’s something o’clock.
How many minutes are there in a
quarter of an hour? We know there are 60 minutes in one
hour, so half an hour is half of 60 which is 30 minutes. And if we half that again, we get a
quarter of an hour, which is 15 minutes. Another way to say quarter past is
15 minutes past. If we start at 12 or o’clock and
count 15 minutes — five, 10, 15 minutes — two quarter turns makes half an hour. Two quarter turns makes a half
turn. So we know that half past is 30
minutes past the hour. If we make three-quarter turns from
o’clock, it’s quarter to the next hour. We know that one hour is 60
minutes; half an hour is 30 minutes; quarter of an hour is 15 minutes. So three-quarters is 45 minutes
past the hour, and it’s a quarter of a turn or 15 minutes until the next hour.
There are four-quarters in one
hour. Each quarter of an hour is worth 15
minutes. Quarter past is the same as 15
minutes past. Two-quarters or one-half is 30
minutes. Three-quarters of an hour is 45
minutes. And a whole hour or four-quarters
is 60 minutes. When we’re telling the time using a
digital clock, if there are zero minutes, we know it’s o’clock. If it’s 15 minutes past the hour,
we know it’s quarter past. 30 minutes past the hour means it’s
half past. And if it’s 45 minutes past the
hour, it means it’s quarter to the next hour. 45 plus 15 makes 60. And we know there are 60 minutes in
a whole hour. In this video, we’re going to
practice reading and writing the time to the quarter hour. Let’s have a go at some practice
questions.
Write the time in words. Is it quarter past ten, quarter to
nine, quarter to ten, or quarter past nine?
In this question, we’re shown a
digital clock, and we’re asked to write the time in words. What time is shown on the
clock? We know the first digit on a
digital clock tells us the hour. And on this clock, the first digit
is a nine. Both of these times have a nine in
them. These digits on the clock tell us
the number of minutes. If it’s 9:15, that means it’s 15
minutes past nine. We know that one hour is 60
minutes. Half an hour is half of 60 which is
30 minutes. And a quarter of an hour is 15
minutes. The time in words is quarter past
nine.
Which clock shows the same time as
this one?
We’re shown the time on an analog
clock. And we have to find the digital
clock which shows the same time. What is the time on this clock? The shortest hand, the hour hand,
is just past the number one. So we know it’s something past 1
o’clock. The hour shown on both of these
digital clocks is one, and the minute hand is pointing to number three. This means it’s quarter past
one. How many minutes have passed when a
quarter of a turn has been made around the clock? Five, 10, 15. It’s 15 minutes past one or quarter
past one. So this is the digital clock, which
shows the same time as the analog clock we were given. The time is 1:15.
What is the time, in words, that
this clock shows? It is a quarter to six. It is a quarter past five. It is a quarter past six. It is a quarter to five.
We know that quarter past is the
same as 15 minutes past the hour. Half past is 30 minutes past the
hour. And quarter to is 45 minutes past
the hour. So if it’s 5:45, that means it’s
quarter to six or 15 minutes until 6 o’clock. It is a quarter to six. The time in words that this clock
shows is a quarter to six.
Which analog clock shows the same
time as this digital one?
We’re shown a digital clock with
the time 4:45. We have to select the analog clock,
which shows the time 4:45. 4:45 is between 4 o’clock and 5
o’clock. Quarter past four is 4:15, 4:30 is
half past four, and 4:45 is quarter to five. In another 15 minutes, it will be 5
o’clock. Which of our clocks shows 45
minutes past four or quarter to five. Both of these two clocks show a
quarter to time. The minute hand is pointing to
number nine, which means there are 15 minutes until the next hour or quarter of an
hour until the next hour. But the hour hand on the first
clock is between the hours five and six.
We already know that 4:45 is
between the hours four and five. The hour hand on this clock is
between 4 and 5 o’clock. This is the analog clock which
shows 4:45 or quarter to five. We used a number line to help and
picked the analog clock, which shows the same time as the digital one.
What have we learned in this
video? We’ve learned how to tell time to
the quarter hour on analog and digital clocks.
