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Primary Maths · Year 2Chapter 7 · Time
Year 2 · Chapter 7

Time

By the end of this chapter you will be able to

  • Know there are 60 minutes in 1 hour and 24 hours in 1 day
  • Tell and write the time to five minutes, including quarter past and quarter to
  • Draw the long hand and the short hand to show a time
  • Say which of two times is earlier or later
  • Find how many minutes pass between two times
  • Work out an end time when I know the start time and how long something lasts

You should already know

  • Telling the time to the hour and half past the hour (Year 1, Chapter 13)
  • Counting in fives and tens (Chapters 1 and 3)
  • Comparing and ordering numbers to 100 (Chapter 1)

Where this leads

  • Telling the time to the minute, and using 12-hour and 24-hour clocks (Year 3)
  • Measuring and comparing time in seconds, minutes and hours (Year 3)

National Curriculum for England, Key Stage 1 mathematics, Year 2. Content: Compare and sequence intervals of time, Tell and write the time to five minutes, including quarter past and quarter to the hour, Draw the hands on a clock face to show a time, Know the number of minutes in an hour and the number of hours in a day.

Exercise P  Do you remember?

Non-calculator
1
FWhat time is it? Write the time as numbers.
123456789101112
2
FCount in fives: 5, 10, 15, __. What number comes next?
010?
3
FThe long hand is on 6. Is it o’clock or half past?
123456789101112
4
RRuby waits 5 minutes. Sam waits 15 minutes. Who waits longer?
?
5
PSRuby gets up at 7 o’clock. Breakfast is at 8 o’clock. How many hours later is breakfast?
Get up123456789101112Breakfast123456789101112
7.1

Minutes in an hour and hours in a day

Year 2
Know the number of minutes in an hour, Know the number of hours in a day
Video lesson: Minutes in an hour and hours in a dayComing soon
School starts at a set time. Every day has a set number of hours.

We measure time in minutes and hours.

There are 60 minutes in 1 hour.

Half an hour is 30 minutes. A quarter of an hour is 15 minutes.

There are 24 hours in 1 day.

Key ideas

  • There are 60 minutes in 1 hour.
  • Half an hour is 30 minutes.
  • A quarter of an hour is 15 minutes.
  • There are 24 hours in 1 day.
Worked example 7.1.1
How many minutes are in 1 hour? Look at the clock.
123456789101112

Method. Use the fact that 1 hour has 60 minutes. Multiply for more hours.

  1. Remember the fact. There are 60 minutes in 1 hour.
    1 hour = 60 minutes
  2. Look at the clock. The long hand goes all the way round once in one hour.
    Long hand all the way round
  3. Write the answer.
    60

Check. Share the answer back: 60 ÷ 60 = 1 hours. ✓

Watch out. An hour is 60 minutes, not 100 minutes.

Worked example 7.1.2
How many minutes are in half an hour?
123456789101112

Method. Share the 60 minutes of one hour into 2 equal parts.

  1. Start with 1 hour. There are 60 minutes in 1 hour.
    60 minutes
  2. Share it into 2 equal parts. Half an hour is one of the 2 equal parts.
    60 ÷ 2 = 30
  3. Write the answer.
    30

Check. 30 minutes, 2 times, makes 60 minutes: 30 × 2 = 60. ✓

Watch out. Half is 2 equal parts. A quarter is 4 equal parts. Check the parts add up to 1 hour.

Worked example 7.1.3
How many hours are in 1 day? Count the yellow squares. Each square is one hour.

Method. Count the hours in a day. Each square is one hour.

  1. Count the squares. Each yellow square is one hour.
    24 squares
  2. Remember the fact. A day has 24 hours.
    1 day = 24 hours
  3. Write the answer.
    24

Check. Count again in tens and fours: 10 + 10 + 4 = 24. ✓

Watch out. A day has 24 hours, not 12. The clock shows 12 hours twice in a day.

Watch out

Watch out: 1 hour is 60 minutes, not 100 minutes. Count in fives round the clock to check: 12 fives make 60.

Exam tip

Grown-up tip. Count round a clock together in fives: 5, 10, 15 ... up to 60. Ask: “How many minutes are in half an hour?” A kitchen timer for 15 minutes shows a quarter of an hour.

Exercise 7A  Minutes in an hour and hours in a day

Non-calculator
1
FHow many minutes are in 1 hour?
123456789101112
2
FHow many minutes are in half an hour?
123456789101112
3
FHow many minutes are in a quarter of an hour? Each star is one minute.
4
FHow many minutes are in 2 hours?
123456789101112
5
FEach number on a clock face is 5 minutes. How many minutes is it from 12 to 3?
123456789101112
6
FHow many hours are in 1 day? Count the squares.
7
FHow many hours are in 2 days?
8
FHow many hours are in half a day?
123456789101112
9
FWrite how many minutes are in each time.
a123456789101112b123456789101112c123456789101112
(a)1 hour
(b)half an hour
(c)a quarter of an hour
10
RAli says there are 100 minutes in 1 hour. Is he right? Write Yes or No.
123456789101112
11
RIs 3 hours more than 150 minutes? Write Yes or No. Explain how you know.
123456789101112
7.2

Telling the time past the hour in fives

Year 2
Tell and write the time to five minutes, Draw the hands on a clock face
Video lesson: Telling the time past the hour in fivesComing soon
A playground. Time goes by while we play.

The short hand shows the hour. The long hand shows the minutes.

Each number on the clock is 5 minutes. Count in fives to find the minutes.

When the long hand is on 3, it is 15 minutes past the hour. We say quarter past.

We can write the time with numbers. Write the hour, then a colon, then the minutes: 3:15.

123456789101112
Quarter past 3. The long hand is on 3. We write it as 3:15.

Key ideas

  • The short hand shows the hour.
  • The long hand shows the minutes.
  • Each number on the clock is 5 minutes. Count in fives.
  • Write the minutes with two digits: 3:05, not 3:5.
Worked example 7.2.1
What time is it? Write it as numbers.
123456789101112

Key words. The short hand shows the hour. The long hand shows the minutes.

Method. Read the short hand for the hour. Read the long hand for the minutes.

  1. Look at the short hand. It shows the hour. It has just passed this number.
    Hour: 4
  2. Look at the long hand. Count the minutes in fives from 12 to the long hand.
    Long hand on 2: 2 × 5 = 10
  3. Write the time. Write the hour, a colon, then the minutes with two digits.
    4:10

Check. The long hand is on 2, which is 10 minutes past the hour. ✓

Watch out. Write the minutes with two digits, like 2:05. Do not write 2:5.

Worked example 7.2.2
What time is it? Write it in words.
123456789101112

Key words. The short hand shows the hour. The long hand shows the minutes.

Method. Read the short hand for the hour. Read the long hand for the minutes.

  1. Look at the short hand. It shows the hour. It has just passed this number.
    Hour: 7
  2. Look at the long hand. Count the minutes in fives from 12 to the long hand.
    Long hand on 5: 5 × 5 = 25
  3. Write the time. Say the hour first, then the minutes.
    twenty-five past 7

Check. The long hand is on 5, which is 25 minutes past the hour. ✓

Watch out. Write the minutes with two digits, like 2:05. Do not write 2:5.

Worked example 7.2.3
The long hand is on 3. How many minutes past the hour is it?
123456789101112

Method. Count the jumps from 12 to the number. Each jump is 5 minutes.

  1. Count the jumps. Each jump goes from one number to the next.
    3 jumps from 12 to 3
  2. Each jump is 5 minutes. Multiply the jumps by 5.
    3 × 5 = 15
  3. Write the answer.
    15

Check. Count on from 12 in fives: 5, 10, ... up to 15. ✓

Watch out. Count in fives, not in ones, when you move round a clock.

Watch out

Watch out: 2:05 is five minutes past 2. Write the minutes with two digits, like 2:05. Do not write 2:5.

Exam tip

Grown-up tip. Draw a clock face on paper with the numbers 1 to 12. Move the long hand to 1, then 2, then 3. Ask: “How many minutes past?” and count in fives out loud: 5, 10, 15.

Exercise 7B  Telling the time past the hour

Non-calculator
1
FWhat time is it? Write it as numbers.
123456789101112
2
FWhat time is it? Write it in words.
123456789101112
3
FWhat time is it? Write it as numbers.
123456789101112
4
FWhat time is it? Write it in words.
123456789101112
5
FWrite each time as numbers.
a123456789101112b123456789101112c123456789101112d123456789101112
(a)Clock a
(b)Clock b
(c)Clock c
(d)Clock d
6
FThe long hand is on 4. How many minutes past the hour is it?
123456789101112
7
PSWhich clock shows ten past 6? Write the letter.
A123456789101112B123456789101112C123456789101112
8
PSLook at clocks A, B and C. Put the times in order, earliest first. Write them as numbers.
A123456789101112B123456789101112C123456789101112
9
RBen says the clock shows 4 minutes past 6. Is he right? Write Yes or No.
123456789101112
10
RMia says the long hand on 3 means 15 minutes past the hour. Is she right? Write Yes or No.
123456789101112
11
RWhat time is 5 minutes after 7:10? Lin says 7:15. Ruby says 7:20. Who is right? Write Lin or Ruby.
123456789101112
7.3

Telling the time to the hour

Year 2
Tell and write the time to five minutes, including quarter to the hour
Video lesson: Telling the time to the hourComing soon
A bus stop. The bus comes at a set time.

We can also count to the next hour.

When the long hand is on 8, it is 40 minutes past the hour. There are 20 minutes left until the next hour.

We say twenty to 4. The time is 3:40 in numbers.

A quarter to is 15 minutes before the next hour. The long hand is on 9.

123456789101112
Twenty to 4. The long hand is on 8, and the time is 3:40.

Key ideas

  • Minutes ‘to’ count back to the next hour.
  • A quarter to means 15 minutes before the next hour.
  • Say the next hour after ‘to’: twenty to 4.
  • The time 3:40 is twenty to 4.
Worked example 7.3.1
What time is it? Write it in words.
123456789101112

Key words. To means the minutes come before the next hour. A quarter to is 15 minutes to the hour.

Method. Look at the long hand. Then count the minutes to the next hour.

  1. Look at the long hand. It is past the number 8, so it is more than 30 minutes past the hour.
    Long hand on 8: 8 × 5 = 40 minutes past
  2. Count the minutes to the next hour. Take the minutes past away from 60. The next hour is 4.
    60 − 40 = 20 minutes to 4
  3. Write the time. Say the minutes to 4, or write the hour and the minutes.
    twenty to 4

Check. 40 minutes past 3 and 20 minutes to 4 make one hour. ✓

Watch out. Do not say 3 when the time is to the next hour. Say the next hour.

Worked example 7.3.2
What time is it? Write it as numbers. The long hand is on 9.
123456789101112

Key words. To means the minutes come before the next hour. A quarter to is 15 minutes to the hour.

Method. Look at the long hand. Then count the minutes to the next hour.

  1. Look at the long hand. It is past the number 9, so it is more than 30 minutes past the hour.
    Long hand on 9: 9 × 5 = 45 minutes past
  2. Count the minutes to the next hour. Take the minutes past away from 60. The next hour is 6.
    60 − 45 = 15 minutes to 6
  3. Write the time. Write the hour, a colon, then the minutes with two digits.
    5:45

Check. 45 minutes past 5 and 15 minutes to 6 make one hour. ✓

Watch out. Do not say 5 when the time is to the next hour. Say the next hour.

Worked example 7.3.3
What time is it? Write it in words.
123456789101112

Key words. To means the minutes come before the next hour. A quarter to is 15 minutes to the hour.

Method. Look at the long hand. Then count the minutes to the next hour.

  1. Look at the long hand. It is past the number 11, so it is more than 30 minutes past the hour.
    Long hand on 11: 11 × 5 = 55 minutes past
  2. Count the minutes to the next hour. Take the minutes past away from 60. The next hour is 11.
    60 − 55 = 5 minutes to 11
  3. Write the time. Say the minutes to 11, or write the hour and the minutes.
    five to 11

Check. 55 minutes past 10 and 5 minutes to 11 make one hour. ✓

Watch out. Do not say 10 when the time is to the next hour. Say the next hour.

Watch out

Watch out: ‘to’ means the next hour is coming. 3:50 is ten to 4, not ten to 3.

Exam tip

Grown-up tip. Use a paper clock. Show 4 o’clock, then move the long hand back, 5 minutes at a time. Ask: “Five minutes before 4 o’clock is what time?” Say ‘to’ and the next hour together.

Exercise 7C  Telling the time to the hour

Non-calculator
1
FWhat time is it? Write it in words.
123456789101112
2
FWhat time is it? Write it as numbers.
123456789101112
3
FWhat time is it? Write it in words.
123456789101112
4
FWhat time is it? Write it in words.
123456789101112
5
FWrite each time as numbers.
a123456789101112b123456789101112c123456789101112
(a)Clock a
(b)Clock b
(c)Clock c
6
FWrite each time in words.
a123456789101112b123456789101112c123456789101112
(a)Clock a
(b)Clock b
(c)Clock c
7
PSAli’s bus leaves at quarter to 9. Which clock shows this time? Write the letter.
A123456789101112B123456789101112C123456789101112
8
RPriya says 4:50 is ten to 4. Is she right? Write Yes or No.
123456789101112
9
PSThe clock shows 4 o’clock. What time is 5 minutes earlier? Write it as numbers.
123456789101112
10
RLin says quarter to 4 and 3:45 are the same time. Is she right? Write Yes or No.
123456789101112
11
RRuby looks at this clock and says it is ten past 3. Is she right? Write Yes or No.
123456789101112
7.4

Drawing the hands on a clock face

Year 2
Draw the hands on a clock face to show a time
Video lesson: Drawing the hands on a clock faceComing soon
Bedtime. Ruby checks the clock before she goes to sleep.

We can show a time on a clock face by drawing the hands.

The short hand shows the hour. The long hand shows the minutes.

The long hand on 3 is quarter past. The long hand on 6 is half past. The long hand on 9 is quarter to.

When the time is not o’clock, the short hand is between two numbers. At 4:30 it is halfway between 4 and 5.

123456789101112
Half past 4. The long hand is on 6. The short hand is halfway between 4 and 5.

Key ideas

  • The long hand on 12 means o’clock.
  • The long hand on 3 means quarter past.
  • The long hand on 6 means half past.
  • The long hand on 9 means quarter to.
Worked example 7.4.1
Draw the long hand for 3:15 on a clock face. Which number does it point to?
123456789101112

Method. Work out how many fives are in the minutes. The long hand points to that number.

  1. Look at the minutes. The time is 15 minutes past the hour.
    15 minutes
  2. Count in fives. Each number on the clock is 5 minutes.
    15 ÷ 5 = 3
  3. Find the number. The long hand points to that number.
    Long hand on 3
  4. Write the answer.
    3

Check. Count round in fives to 3: 3 × 5 = 15 minutes. ✓

Watch out. The long hand points to the minutes. Count in fives round the clock.

Worked example 7.4.2
Draw the hands for half past 5. Where is the short hand? Write it like this: between 2 and 3.
123456789101112

Method. The short hand moves on a little every minute. Look where it is between the numbers.

  1. Look at the minutes. The minutes are not zero, so the short hand is not on a number.
    30 minutes
  2. Look at the hour. The hour is 5, so the short hand has just passed 5.
    Hour 5
  3. Write the answer. It is on its way to 6.
    between 5 and 6

Check. A quarter of the way to 6 is for 15 minutes. The hour is 5. ✓

Watch out. When the time is not o’clock, the short hand is between two numbers.

Worked example 7.4.3
The long hand is on 9. The short hand is nearly at 8. What time is it? Write it as numbers.
123456789101112

Method. The long hand shows the minutes. The short hand is nearly at 8, so the hour is 7.

  1. Look at the long hand. On 9 the minutes are 45.
    Long hand on 9: 9 × 5 = 45
  2. Look at the short hand. It is nearly at 8 but has not reached it, so the hour is 7.
    Hour: 7
  3. Write the time. Write the hour, a colon, then the minutes.
    7:45

Check. Quarter to 8 is 7:45, and the long hand on 9 shows 45 minutes. ✓

Watch out. Read the short hand for the hour. Do not read the hour as 8 when it is still nearly at 8.

Watch out

Watch out: the short hand is the hour. It is not the long hand. The long hand on 6 is half past, and the short hand is between two numbers.

Exam tip

Grown-up tip. Let your child draw the hands on a paper clock with a card hand and a split pin. Say a time, like “quarter past 8”, and ask: “Where does the long hand go?” Then ask where the short hand goes.

Exercise 7D  Drawing the hands

Non-calculator
1
FOn paper, draw the long hand for half past 5. Which number does it point to?
123456789101112
2
FOn paper, draw the long hand for quarter past 8. Which number does it point to?
123456789101112
3
FOn paper, draw the long hand for quarter to 9. Which number does it point to?
123456789101112
4
FOn paper, draw the long hand for 10 minutes past 2. Which number does it point to?
123456789101112
5
FOn paper, draw the long hand for 20 minutes past 6. Which number does it point to?
123456789101112
6
FThe long hand is on 11. The short hand is just before 12. What time is it? Write it as numbers.
123456789101112
7
PSOn paper, draw the hands for 6:10. Where is the short hand? Write it like this: between 2 and 3.
123456789101112
8
RTom draws the short hand on 4 and the long hand on 6. He says it is 4 o’clock. Is he right? Write Yes or No.
123456789101112
9
PSOn paper, draw the hands for quarter past 4. Where is the short hand? Write it like this: between 2 and 3.
123456789101112
10
PSThe long hand is on 5. The short hand is between 8 and 9. What time is it? Write it as numbers.
123456789101112
11
RMia says that when the long hand is on 3, it is always quarter past the hour. Is she right? Write Yes or No.
123456789101112
7.5

Comparing and ordering times

Year 2
Compare and sequence intervals of time, Say which time is earlier or later
Video lesson: Comparing and ordering timesComing soon
A day at the seaside. Some things happen before others.

Some times are earlier and some are later.

A time with the smaller hour is earlier. If the hours are the same, the smaller minutes come first.

We can also find how long something takes. Count on to the next hour. Then count on the minutes.

From 2:15 to 2:45 is 30 minutes.

A123456789101112B123456789101112
Clock A shows 2:15. Clock B shows 2:45. From A to B is 30 minutes.

Key ideas

  • A time with the earlier hour comes first.
  • If the hours match, the smaller minutes come first.
  • To find how long something takes, count on.
  • Count on to the next hour, then count on the minutes.
Worked example 7.5.1
Which is earlier: 3:20 or 3:45? Look at the clocks.
A123456789101112B123456789101112

Method. Compare the hours first. If the hours match, compare the minutes.

  1. Read both times. Write each time with numbers.
    3:20 and 3:45
  2. Compare the hours. The earlier hour comes first.
    3 and 3
  3. Compare the minutes if needed. If the hours are the same, the smaller minutes come first.
    20 and 45 minutes
  4. Write the earlier time.
    3:20

Check. The other time is later, so 3:20 is right. ✓

Watch out. Look at the hour first. Then look at the minutes.

Worked example 7.5.2
Ali starts at 2:15 and finishes at 2:40. How many minutes is that?
A123456789101112B123456789101112

Method. Count on from the first time to the second time. Count the minutes.

  1. Start at the first time. Put your finger on the first time.
    2:15
  2. Count on in fives to the second time. From 15 minutes to 40 minutes past 2.
    40 − 15 = 25
  3. Write the answer.
    25

Check. Count back: 25 minutes on from 2:15 reaches 2:40. ✓

Watch out. Count on to the next hour first. Then count on the minutes.

Worked example 7.5.3
Look at the clocks. Put the times in order, earliest first. Write them as numbers.
A123456789101112B123456789101112C123456789101112

Method. Read each time. Then put them in order, earliest first.

  1. Read each clock. Write each time with numbers.
    10:30, 9:45, 10:05
  2. Put them in order. The earliest time has the smallest hour. If the hours match, the smaller minutes come first.
    9:45, 10:05, 10:30
  3. Write the answer.
    9:45, 10:05, 10:30

Check. There are 3 times in the picture and 3 times in the answer. ✓

Watch out. Look at the hour first. 9:45 is earlier than 10:05.

Watch out

Watch out: 9:45 is earlier than 10:05, even though 45 is more than 5. Look at the hour first.

Exam tip

Grown-up tip. Set two paper clocks, one to a start time and one to a finish time. Count the minutes between them together, in fives first.

Exercise 7E  Comparing and ordering times

Non-calculator
1
FLook at clocks A and B. Which is later? Write the time as numbers.
A123456789101112B123456789101112
2
FLook at clocks A and B. Which is earlier? Write the time as numbers.
A123456789101112B123456789101112
3
FHow many minutes are there from clock A to clock B?
A123456789101112B123456789101112
4
PSHow many minutes from clock A to clock B?
A123456789101112B123456789101112
5
PSHow many minutes from clock A to clock B? The second clock is in the next hour.
A123456789101112B123456789101112
6
PSLook at clocks A, B and C. Put the times in order, earliest first. Write them as numbers.
A123456789101112B123456789101112C123456789101112
7
PSMo’s lesson starts at clock A and ends at clock B. How many minutes long is the lesson?
A123456789101112B123456789101112
8
FWhich is longer: 45 minutes or 1 hour? Write the answer.
123456789101112
9
PSRavi starts reading at clock A and stops at clock B. How many minutes does he read?
A123456789101112B123456789101112
10
PSLin starts at 3:55 and finishes at 4:10. How many minutes is that?
A123456789101112B123456789101112
11
RRavi says 8:45 is later than 9:00. Is he right? Write Yes or No.
A123456789101112B123456789101112
7.6

Timetables and how long things last

Year 2
Compare and sequence intervals of time, Know the number of minutes in an hour
Video lesson: Timetables and how long things lastComing soon
A park. The park trip has a timetable.

A timetable shows when things start. Some things last for a set time.

To find the end time, add the time it lasts to the start time.

If something lasts 1 hour, the hour goes on by 1. The minutes stay the same.

Always check that your end time comes after the start time.

Key ideas

  • Read the start time and how long it lasts.
  • Count on to find the end time.
  • One hour later, the hour goes on by one.
  • Check: the end time comes after the start time.
Worked example 7.6.1
Swimming starts at 10:00 and lasts 1 hour. What time does it finish?
123456789101112

Method. Start at the start time. Add the length of the event.

  1. Start at the start time. Put your finger on the start time.
    10:00
  2. Add 1 hour. Count the hours first. Then count the minutes.
    10:00 + 1 hour = 11:00
  3. Write the end time. Write the hour, a colon, then the minutes.
    11:00

Check. Count back 1 hour from 11:00 to get 10:00. ✓

Watch out. When the minutes pass 60, the hour changes. Do not write 4:60.

Worked example 7.6.2
Look at the timetable. Maths starts at 9:15. Break starts at 10:00. How many minutes is maths?
TimeWhat happens9:15Maths10:00Break

Method. Count on from the first time to the second time. Count the minutes.

  1. Start at the first time. Put your finger on the first time.
    9:15
  2. Count on to 10. Count the minutes to the next hour first.
    60 − 15 = 45
  3. Count on to 10:00. Then add the minutes past 10.
    45 + 0 = 45
  4. Write the answer.
    45

Check. Count back: 45 minutes on from 9:15 reaches 10:00. ✓

Watch out. Count on to the next hour first. Then count on the minutes.

Worked example 7.6.3
The bus leaves at 3:20. The trip takes 20 minutes. What time does the bus arrive?
123456789101112

Method. Start at the start time. Add the length of the event.

  1. Start at the start time. Put your finger on the start time.
    3:20
  2. Add 20 minutes. Count the hours first. Then count the minutes.
    3:20 + 20 minutes = 3:40
  3. Write the end time. Write the hour, a colon, then the minutes.
    3:40

Check. Count back 20 minutes from 3:40 to get 3:20. ✓

Watch out. When the minutes pass 60, the hour changes. Do not write 4:60.

Watch out

Watch out: 1 hour after 4:30 is 5:30, not 4:60. The hour changes and the minutes stay the same.

Exam tip

Grown-up tip. Use a real timetable, like a bus or swimming timetable. Ask: “When does it start? How long does it last? When does it finish?” Count on in fives on a clock together.

Exercise 7F  Timetables and end times

Non-calculator
1
FA film starts at 2:00 and lasts 1 hour. What time does it finish? Write it as numbers.
123456789101112
2
FTea is at 5:00. Bath is 30 minutes later. What time is bath? Write it as numbers.
123456789101112
3
FAssembly starts at 9:00 and lasts 15 minutes. What time does it end? Write it as numbers.
123456789101112
4
PSThe play starts at 1:45 and lasts 15 minutes. What time does it finish? Write it as numbers.
123456789101112
5
PSLook at the timetable. How many minutes is music?
TimeWhat happens1:30Music2:00Break
6
PSLunch starts at 12:00 and lasts 1 hour. When does lunch end? Write it as numbers.
123456789101112
7
PSWrite each end time as numbers.
a123456789101112b123456789101112c123456789101112
(a)2:00 plus 30 minutes
(b)7:15 plus 15 minutes
(c)9:45 plus 15 minutes
8
PSA park visit starts at 2:00 and ends at 5:00. How many hours is that?
A123456789101112B123456789101112
9
RBen says the film starts at 6:45 and ends at 7:00, so it lasts 1 hour. Is he right? Write Yes or No.
A123456789101112B123456789101112
10
RTia says 2 hours and 30 minutes is 150 minutes. Is she right? Write Yes or No.
123456789101112
11
PSA club starts at 3:50 and lasts 20 minutes. What time does it finish? Write it as numbers.
123456789101112

Chapter summary

SkillMethod
Minutes and hours1 hour = 60 minutes. Half an hour = 30 minutes. A quarter of an hour = 15 minutes. 1 day = 24 hours.
Past the hourThe short hand is the hour. Count the long hand in fives. Write 2:05 with two digits.
Quarter past and half pastLong hand on 3 = quarter past. Long hand on 6 = half past.
To the hourCount the minutes to the next hour. Quarter to: 15 minutes before the next hour.
Draw the handsThe long hand shows the minutes. The short hand shows the hour, between two numbers if it is not o’clock.
Earlier, later and how longCompare the hours first. Count on to the next hour, then count on the minutes.

Can you…?

  • I know there are 60 minutes in 1 hour.
  • I know there are 24 hours in 1 day.
  • I can tell the time to five minutes, like 3:10 or 3:25.
  • I can say quarter past, quarter to and half past.
  • I can write the time with numbers, like 3:15.
  • I can draw the long hand and the short hand for a time.
  • I can say which time is earlier or later.
  • I can count on to find how long something takes.

Key terms

hour
a unit of time. There are 60 minutes in 1 hour and 24 hours in 1 day.
minute
a unit of time. There are 60 minutes in 1 hour.
short hand
the hand that shows the hour on a clock.
long hand
the hand that shows the minutes on a clock.
quarter past
15 minutes after the hour. The long hand is on 3.
quarter to
15 minutes before the next hour. The long hand is on 9.
half past
30 minutes after the hour. The long hand is on 6.
to
the minutes before the next hour, like twenty to 4.
digital time
a time written with numbers, like 3:15.
earlier
before another time.
later
after another time.
timetable
a list that shows when things start and finish.

Exercise 7Z  Check-up

Non-calculator
1
What time is it? Write it as numbers.
123456789101112
2
What time is it? Write it in words.
123456789101112
3
What time is it? Write it in words.
123456789101112
4
How many minutes are in 3 hours?
123456789101112
5
Each number on a clock is 5 minutes. How many minutes from 12 to 4?
123456789101112
6
Mia starts at clock A and finishes at clock B. How many minutes is that?
A123456789101112B123456789101112
7
Which clock shows quarter past 2? Write the letter.
A123456789101112B123456789101112C123456789101112
8
Look at clocks A, B and C. Put the times in order, earliest first. Write them as numbers.
A123456789101112B123456789101112C123456789101112
9
Lin says the clock shows 10 past 8. Is she right? Write Yes or No.
123456789101112
10
A bus leaves at 4:45. The trip takes 15 minutes. When does it arrive? Write it as numbers.
123456789101112

Total 13 marks. Allow about 13 minutes.

Exercise 7X  End-of-chapter quiz

Non-calculator
1
FWhat time is it? Write it as numbers.[1 mark]
123456789101112
2
FWhat time is it? Write it in words.[1 mark]
123456789101112
3
FWhat time is it? Write it in words.[1 mark]
123456789101112
4
FHow many hours are in 2 days?[1 mark]
5
FOn paper, draw the long hand for quarter to 4. Which number does it point to?[1 mark]
123456789101112
6
FLook at clocks A and B. Which is later? Write the time as numbers.[1 mark]
A123456789101112B123456789101112
7
PSAli starts at clock A and finishes at clock B. How many minutes is that?[2 marks]
A123456789101112B123456789101112
8
PSA film starts at 3:30 and lasts 1 hour. What time does it finish? Write it as numbers.[1 mark]
123456789101112
9
RTom says 25 past 6 is 6:25. Is he right? Write Yes or No.[2 marks]
123456789101112
10
RThe short hand is between 8 and 9 and the long hand is on 6. Sam says it is 9 o’clock. Is Sam right? Write Yes or No.[2 marks]
123456789101112
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