This handy Math in Focus Grade 3 Workbook Answer Key Chapter 16 Practice 1 Telling Time provides detailed solutions for the textbook questions.
Math in Focus Grade 3 Chapter 16 Practice 1 Answer Key Telling Time
Tell the time. Use past.
Example
Question 1.
Answer: Twenty minutes past 2.
A Clock is a circular device provided with three hands viz. an hour hand, minute and second hand. The study of the clock is known as “horology”.
First of all, we need to learn the definition of time: In math, time can be defined as the ongoing and continuous sequence of events that occur in succession, from the past through the present to the future. Time is used to quantify, measure or compare the duration of events or the intervals between them, and even, sequence events.
We measure time in seconds, minutes, hours, days, weeks, months and years with clocks and calendars.
– The shorthand is the hour hand.
– The long hand is a minute hand.
In the given question, the shorthand is on 2. And the long hand is on 4.
Now we can say the time is 2 hours 20 minutes. In another, we can say twenty minutes past 2.
Question 2.
Answer: 15 minutes past 4.
This can be represented in the below diagram:
We measure time in seconds, minutes, hours, days, weeks, months and years with clocks and calendars.
– The shorthand is the hour hand.
– The long hand is a minute hand.
In the given question, the shorthand is on 4. And the long hand is on 3.
Now we can say the time is 4 hours 15 minutes. In another, we can say fifteen minutes past 4.
Question 3.
Answer: 8 minutes past 11
Count the small hands in between 1 and 2 which represents the minutes.
1 represents 5.
2 represents 10.
In between 5 and 10, there are 6, 7, 8, 9 hands also there. That I represented in the above diagram.
Tell the time. Use to.
Example
Question 4.
Answer: 35 minutes to 8
Explanation:
The shorthand represents the hour.
The long hand represents minutes.
The shorthand is on 8 and the long hand is on 7.
In the clock 7 represents 35. So the answer is 35 minutes to 8.
Question 5.
Answer: 5 minutes to 2.
Explanation: The minute hand is pointing to 11. This means that it is 5 minutes to the next hour. The hour hand is moving towards two. The representation is done in the below diagram.
Question 6.
Answer: 31 minutes to 4
The minute hand of our clock is on 31.
Count clock-wise direction in one’s 25, 26, 27, 28, 29, 30, 31.
This means that it is 31 minutes to the next hour.
The hour hand is moving towards 4.
Tell the time. Use past or to.
Question 7.
Answer: 11 minutes to 7
– Each increment on the clock face is one minute.
– Looking at the left-hand side of the clock, moving anti-clockwise from 12, each number is multiple of 5 minutes to the next hour.
– So, from 12 we can count in fives to find out how many minutes there are until the next hour is reached.
– We can count the minute up to 25, but not including 30. We don’t say 30 minutes to. Instead, we say half-past.
– According to the above diagram from 12 we can count 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, and so on… up to 30 in the anti-clockwise direction.
– In the diagram, the representation is 11 minutes to 7.
Question 8.
Answer:23 minutes past 3
– Each increment on the clock face is one minute.
– Looking at the right-hand side of the clock, moving clockwise from 12, each number is multiple of 5 minutes to the next hour.
– So, from 12 we can count in fives to find out how many minutes there are until the next hour is reached.
– We can count the minute up to 25, but not including 30. We don’t say 30 minutes to. Instead, we say half-past.
– According to the above diagram from 12 we can count 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, and so on… up to 30 in the clockwise direction.
– In the diagram, the representation is 23 minutes past 3.
Question 9.
Answer: 18 minutes to 6.
Explanation:
The actual time gave 5:42.
1 hour is equal to 60 minutes.
5:42 can be written as 5 hours 42 minutes.
If we subtract 42 from 60: 60-42=18.
So what is this mean, 18 minutes left to the next hour.
The next hour is 6. So I wrote 18 minutes to 6.
Question 10.
Answer: 17 minutes to 8
Explanation:
The actual time gave 7:43.
1 hour is equal to 60 minutes.
7:43 can be written as 7 hours 43 minutes.
If we subtract 43 from 60: 60-43=17.
So what is this mean, 17 minutes left to the next hour.
The next hour is 8. So I wrote 17 minutes to 8.
Question 11.
Answer: 12 minutes past 4.
– Each increment on the clock face is one minute.
– Looking at the right-hand side of the clock, moving clockwise from 12, each number is multiple of 5 minutes to the next hour.
– So, from 12 we can count in fives to find out how many minutes there are until the next hour is reached.
– We can count the minute up to 25, but not including 30. We don’t say 30 minutes to. Instead, we say half-past.
– According to the above diagram from 12 we can count 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, and so on… up to 30 in the clockwise direction.
– In the diagram, the representation is 12 minutes past 4.
Question 12.
Answer: 5 minutes to 4
Explanation:
The actual time gave 3:55.
1 hour is equal to 60 minutes.
3:55 can be written as 3 hours 55 minutes.
If we subtract 55 from 60: 60-55=5.
So what is this mean, 5 minutes left to the next hour.
The next hour is 4. So I wrote 5 minutes to 4.
Tell the time in two ways.
Example
6:20
20 minutes past 6
4:55
5 minutes to 5
10 minutes to 8
50 minutes past 7
50 minutes to 3
10 minutes past 2
Question 13.
Answer:
First way:
25 minutes past 7
– Each increment on the clock face is one minute.
– Looking at the right-hand side of the clock, moving clockwise from 12, each number is multiple of 5 minutes to the next hour.
– So, from 12 we can count in fives to find out how many minutes there are until the next hour is reached.
– We can count the minute up to 25, but not including 30. We don’t say 30 minutes to. Instead, we say half-past.
– According to the above diagram from 12 we can count 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, and so on… up to 30 in the clockwise direction.
– In the diagram, the representation is 25 minutes past 7.
Second way:
35 minutes to 8:
The actual time gave 7:25.
1 hour is equal to 60 minutes.
7:25 can be written as 7 hours 25 minutes.
If we subtract 25 from 60: 60-25=35.
So what is this mean, 35 minutes left to the next hour.
The next hour is 8. So I wrote 35 minutes to 8.
Question 14.
Answer:
We can write in two ways:
1. 12 minutes past 9
2. 48 minutes to 10
First way:
– Each increment on the clock face is one minute.
– Looking at the right-hand side of the clock, moving clockwise from 12, each number is multiple of 5 minutes to the next hour.
– So, from 12 we can count in fives to find out how many minutes there are until the next hour is reached.
– We can count the minute up to 25, but not including 30. We don’t say 30 minutes to. Instead, we say half-past.
– According to the above diagram from 12 we can count 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, and so on… up to 30 in the clockwise direction.
– In the diagram, the representation is 12 minutes past 9.
Second way:
48 minutes to 10.
The actual time gave 9:12.
1 hour is equal to 60 minutes.
9:12 can be written as 9 hours 12 minutes.
If we subtract 55 from 60: 60-12=48.
So what is this mean, 48 minutes left to the next hour.
The next hour is 10. So I wrote 48 minutes to 10.
Question 15.
Answer:
We can say time in two ways:
1. 47 minutes past 6
2. 13 minutes to 7.
First way:
– Each increment on the clock face is one minute.
– Each number is multiple of 5 minutes to the next hour.
– So, from 12 we can count in fives to find out how many minutes there are until the next hour is reached.
– We can count the minute up to 25, but not including 30. We don’t say 30 minutes to. Instead, we say half-past.
– According to the above diagram from 12. 1, 2, 3, 4, 5, and so on… up to 60.
– In the diagram, the representation is 47 minutes past 6.
Second way:
17 minutes to 7.
The actual time gave 6:47.
1 hour is equal to 60 minutes.
6:47 can be written as 6 hours 47 minutes.
If we subtract 47 from 60: 60-47=13.
So what is this mean, 13 minutes left to the next hour.
The next hour is 7. So I wrote 13 minutes to 7.
Question 16.
Answer:
we can say two ways in time.
13 minutes past 7
47 minutes to 8
First way:
– Each increment on the clock face is one minute.
– Each number is multiple of 5 minutes to the next hour.
– So, from 12 we can count in fives to find out how many minutes there are until the next hour is reached.
– We can count the minute up to 25, but not including 30. We don’t say 30 minutes to. Instead, we say half-past.
– According to the above diagram from 12. 1, 2, 3, 4, 5, and so on… up to 60.
– In the diagram, the representation is 13 minutes past 7.
Second way:
47 minutes to 8.
The actual time gave 7:13.
1 hour is equal to 60 minutes.
7:13 can be written as 6 hours 47 minutes.
If we subtract 13 from 60: 60-13=47.
So what is this mean, 47 minutes left to the next hour.
The next hour is 8. So I wrote 47 minutes to 8.
Question 17.
Answer:
1. 39 minutes past 4
2. 21 minutes to 5
First way:
39 minutes past 4
– Each increment on the clock face is one minute.
– Each number is multiple of 5 minutes to the next hour.
– So, from 12 we can count in fives to find out how many minutes there are until the next hour is reached.
– We can count the minute up to 25, but not including 30. We don’t say 30 minutes to. Instead, we say half-past.
– According to the above diagram from 12. 1, 2, 3, 4, 5, and so on… up to 60.
– In the diagram, the representation is 39 minutes past 4.
Second way:
21 minutes to 5
The actual time gave 4:39.
1 hour is equal to 60 minutes.
4:39 can be written as 6 hours 47 minutes.
If we subtract 39 from 60: 60-39=21.
So what is this mean, 21 minutes left to the next hour.
The next hour is 5. So I wrote 21 minutes to 5.
Question 18.
Answer:
1. 52 minutes past 10
2. 8 minutes to 11
First way:
52 minutes past 10
– Each increment on the clock face is one minute.
– Each number is multiple of 5 minutes to the next hour.
– So, from 12 we can count in fives to find out how many minutes there are until the next hour is reached.
– We can count the minute up to 25, but not including 30. We don’t say 30 minutes to. Instead, we say half-past.
– According to the above diagram from 12. 1, 2, 3, 4, 5, and so on… up to 60.
– In the diagram, the representation is 52 minutes past 10.
Second way:
21 minutes to 5
The actual time gave 10:52.
1 hour is equal to 60 minutes.
10:52 can be written as 10 hours 52 minutes.
If we subtract 52 from 60: 60-52=8.
So what is this mean, 8 minutes left to the next hour.
The next hour is 11. So I wrote 8 minutes to 11.
Draw the minute hand to show the time.
Question 19.
25 minutes past 11
Answer:
We measure time in seconds, minutes, hours, days, weeks, months and years with clocks and calendars.
– The shorthand is the hour hand.
– The long hand is a minute hand.
In the given question, the shorthand is on 11. And the long hand is on 25.
Now we can say the time is 11 hours 25 minutes. In another, we can say 25 minutes past 11.
Question 20.
18 minutes to 7
Answer:
– Each increment on the clock face is one minute.
– Looking at the left-hand side of the clock, moving anti-clockwise from 12, each number is multiple of 5 minutes to the next hour.
– So, from 12 we can count in fives to find out how many minutes there are until the next hour is reached.
– We can count the minute up to 25, but not including 30. We don’t say 30 minutes to. Instead, we say half-past.
– According to the above diagram from 12 we can count 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, and so on… up to 30 in the anti-clockwise direction.
– In the diagram, the representation is 18 minutes to 7.
Write the time on the clock.
Question 21.
18 minutes to 1
Answer: 12:48
18 minutes to 1
The actual time is 12:42.
1 hour is equal to 60 minutes.
12:42 can be written as 10 hours 52 minutes.
If we subtract 42 from 60: 60-42=18.
So what is this mean, 18 minutes left to the next hour.
The next hour is 1. So I wrote 18 minutes to 1.
Question 22.
25 minutes past 2
Answer: 2:25
– Each increment on the clock face is one minute.
– Looking at the right-hand side of the clock, moving clockwise from 12, each number is multiple of 5 minutes to the next hour.
– So, from 12 we can count in fives to find out how many minutes there are until the next hour is reached.
– We can count the minute up to 25, but not including 30. We don’t say 30 minutes to. Instead, we say half-past.
– According to the above diagram from 12 we can count 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, and so on… up to 30 in the clockwise direction.
– In the diagram, the representation is 25 minutes past 2.
Fill in the blanks with the correct time.
Question 23.
18 minutes past 2 is ___________.
Answer: 2:18
– Each increment on the clock face is one minute.
– Looking at the right-hand side of the clock, moving clockwise from 12, each number is multiple of 5 minutes to the next hour.
– So, from 12 we can count in fives to find out how many minutes there are until the next hour is reached.
– We can count the minute up to 25, but not including 30. We don’t say 30 minutes to. Instead, we say half-past.
– According to the above diagram from 12 we can count 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, and so on… up to 30 in the clockwise direction.
– In the diagram, the representation is 18 minutes past 2.
Question 24.
15 minutes to 1 is __________.
Answer: 12:45
The actual time is 12:45.
1 hour is equal to 60 minutes.
12:45 can be written as 12 hours 45 minutes.
If we subtract 55 from 60: 60-45=15.
So what is this mean, 15 minutes left to the next hour.
The next hour is 1. So I wrote 15 minutes to 1.
Question 25.
8:25 is __________ minutes past __________.
Answer: 25 minutes past 8
– Each increment on the clock face is one minute.
– Looking at the right-hand side of the clock, moving clockwise from 12, each number is multiple of 5 minutes to the next hour.
– So, from 12 we can count in fives to find out how many minutes there are until the next hour is reached.
– We can count the minute up to 25, but not including 30. We don’t say 30 minutes to. Instead, we say half-past.
– According to the above diagram from 12 we can count 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, and so on… up to 30 in the clockwise direction.
Question 26.
6:50 is __________ minutes to ___________.
Answer: 10 minutes to 7
The actual time is 6:50.
1 hour is equal to 60 minutes.
6:50 can be written as 6 hours 50 minutes.
If we subtract 50 from 60: 60-50=10.
So what is this mean, 10 minutes left to the next hour.
The next hour is 7. So I wrote 10 minutes to 7.
