Name:

Class:

Date:

5

Time

11

3

1

6

Practice 1 Seconds (1) How many seconds does it take the second hand of a clock to move from (a) 12 to 1?

s s

(b) 12 to 5? 11

12

1 2

10

(c) 12 to 11? 9

(d) 3 to 8?

s 3

8

s

4 7

6

5

(e) 6 to 10?

s

(f)

s

9 to 2?

(2) How many seconds does it take the second hand of a clock to make (a) one complete turn round the clock?

s

(b) a quarter turn round the clock?

s

(c) a three quarter turn round the clock?

s

(d) a one and a half turn round the clock?

s

(e) two complete turns round the clock?

s

79

Chapter 11:Time

J47 â&#x20AC;˘P4Bâ&#x20AC;˘Chp11

79

7/30/06, 1:35 PM

(3) Look at the clock faces given. Fill in the boxes. 11

12

1 2

10 9

3 8

4 7

6

5

1.45 p.m.

11

12

1

11 2

10 9

6

s later

6

2 3

8

4 7

1

9

3 8

5

12

10

2

9

4 7

11

1

10 3

8

12

5

4 7

6

s later

5

s later

(4) Look at the clock faces. Draw the missing minute and/or second hand(s) on each clock. Then fill in the boxes. 12

11

1

after 40 s

2

10 9

3 8

11

6

1 2

9

3 8

4 7

12

10

5

4 7

6

5.10 p.m.

5

p.m. after 50 s

12

11

after 30 s

1 2

10 9

4 7

6

12

2

5

9

3 8

4 7

6

p.m.

5

p.m.

80 J47 â&#x20AC;˘P4Bâ&#x20AC;˘Chp11

1

10 3

8

11

Chapter 11: Time

80

7/30/06, 1:35 PM

Name:

Class:

Date:

Practice 2 24-Hour Clock (1) For each of the following, write down the possible times using the 12-hour and 24-hour clocks. (a) 11

12

1 2

10 9

3 8

12-hour clock

24-hour clock

1. 9.30 a.m.

1.

2. 9.30 p.m.

2.

12-hour clock

24-hour clock

1.

1.

2.

2.

12-hour clock

24-hour clock

1.

1.

2.

2.

12-hour clock

24-hour clock

1.

1.

2.

2.

4 7

(b) 11

6

12

5

1 2

10 9

3 8

4 7

(c) 11

6

12

5

1 2

10 9

3 8

4 7

(d) 11

6

12

5

1 2

10 9

3 8

4 7

6

5

81

Chapter 11: Time

J47 •P4B•Chp11

81

7/30/06, 1:35 PM

(2) Write down the times using either the 12-hour or 24-hour clocks. Match the letters to the answers below to solve the question.

12-hour clock

24-hour clock

6.30 a.m.

L

8.45 a.m.

I

O

11 15

N

12 30 6.05 p.m.

R

7.45 p.m.

E

M

22 05

What is a popular tourist attraction in Singapore?

10.05 p.m.

19 45

18 05

06 30

08 45

11.15 a.m. 12.30 p.m.

(3) In the time line below, mark a cross (x) to show the following times. Then write the time above each cross. (a)

08 00

(b)

06 00

12 30

(c)

12 00

16 45

18 00

(4) In the time line below, mark a cross (x) to show the following times. Then write the time above each cross. (a)

14 00

(b)

18 15

(c)

12 00

00 00

82 J47 â&#x20AC;˘P4Bâ&#x20AC;˘Chp11

21 55

Chapter 11: Time

82

7/30/06, 1:36 PM

(5) Rafi walked from Town A to Town E. The diagram below shows the time he left Town A and the times he reached Towns B to E. A

B

10 00 10 42

C

D

E

11 56

14 25

?

(a) The time Rafi took to walk from: Town A to Town B is

h

min.

(ii) Town B to Town C is

h

min.

(iii) Town C to Town D is

h

min.

(i)

(b) Rafi took 7 hours 15 min to walk from Town D to Town E. . He reached Town E at

Solve these word problems. (6) (a) Sufen began her ballet lesson at 17 30. The lesson lasted 45 minutes. At what time did the lesson end?

(b) A Mathematics test began at 11 35. Joy finished the test in 55 minutes. At what time did Joy finish her Mathematics test?

83

Chapter 11: Time

J47 â&#x20AC;˘P4Bâ&#x20AC;˘Chp11

83

7/30/06, 1:36 PM

(7) (a) Geh Min walks from her house to the bus stop every day. She leaves home at 06 52 and reaches the bus stop at 07 15. How long does Geh Min take to walk from her house to the bus stop?

(b) A movie started at 21 45 and ended at 00 36 the next day. How long was the movie?

(c) A New Year party started at 22 30 on Friday. The party ended at 01 15 the next day. How long was the party?

84

Chapter 11: Time

WB_4B_U11(79-88)

84 Black

26/1/07, 11:10 AM

(8) (a) A wedding dinner ended at 23 05. The dinner lasted 3 h 10 min. At what time did the dinner start?

(b) Mei Ling attended a lesson at a club. The lesson was 2 h 25 min long. Her lesson ended at 10 35. At what time did it start?

85

Chapter 11: Time

J47 â&#x20AC;˘P4Bâ&#x20AC;˘Chp11

85

7/30/06, 1:37 PM

(c) A football match between Geylang United and Gombak United lasted 1 h 45 min. The match ended at 18 45. At what time did it start?

(d) Bala arrived at the swimming club at 15 20. He took 42 minutes to travel from his house to the club. At what time did he leave his house?

86 J47 â&#x20AC;˘P4Bâ&#x20AC;˘Chp11

Chapter 11: Time

86

7/30/06, 1:37 PM

Name:

Class:

Date:

Challenging Practice

(1) Jenny celebrated her birthday on 12 October at 17 45. Her sister celebrated her birthday 18 hours later. Give the date and time of her sister’s birthday celebration.

(2) Jerry celebrated his birthday on Saturday at 20 30. Rani celebrated her birthday 30 hours earlier. On what day and at what time did Rani celebrate her birthday?

87

Chapter 11:Time

J47 •P4B•Chp11

87

7/30/06, 1:37 PM

Name:

Class:

Date:

Problem Solving

(1) When it is 08 00 in Singapore, it is 07 00 in Bangkok. Li Ling called her friend who was in Bangkok. The time in Singapore was 10 30. What was the time in Bangkok? Singapore time 08 00 Bangkok time

07 00

(2) When it is 08 00 in Singapore, it is 10 00 in Sydney. A plane took off from Singapore at 09 45 and flew to Sydney. When it landed in Sydney, a clock there showed 19 45. How long did the flight actually take? ? Singapore time 08 00 Sydney time

09 45

10 00

19 45

88

Chapter 11:Time

WB_4B_U11(79-88)

88 Black

26/1/07, 12:21 PM

Time WB

Time WB 4b

Time WB

Time WB 4b