Answers

Answers to practice exercises

Chapter 1

Exercise 1 (page 2)

1.19kg 2. 16m 3. 479mm

4.− 66 5. £565 6. − 225

7.− 2136 8. − 36121 9. £107701

10.− 4 11. 1487 12. 5914

13.189g 14. − 70872 15.$15333

16. 89 .25cm

17.d=64mm,A=136mm,B=10mm

Exercise 2 (page 5)

1.(a) 468 (b) 868 2. (a) £1827 (b) £4158

3.(a) 8613kg (b) 584kg

4.(a) 351mm (b) 924mm

5.(a) 10304 (b)− 4433 6. (a) 48m (b) 89m

7.(a) 259 (b) 56 8. (a) 1648 (b) 1060

9.(a) 8067 (b) 3347 10. 18kg

Exercise 3 (page 6)

1.(a) 4 (b) 24 2.(a) 12 (b) 360
3.(a) 10 (b) 350 4.(a) 90 (b) 2700

5.(a) 2 (b) 210 6.(a) 3 (b) 180

7.(a) 5 (b) 210 8.(a) 15 (b) 6300

9.(a) 14 (b) 420420 10.(a) 14 (b) 53900

Exercise 4 (page 8)

1. 59 2. 14 3. 88 4. 5 5.− 33


2. 22 7. 68 8. 5 9. 2 10. 5
   11.− 1

Chapter 2

Exercise 5 (page 11)

1. 2

1

7

2. 7

2

5

3.

22

9

4.

71

8

5.

4

11

6.

3

7

,

4

9

,

1

2

,

3

5

,

5

8

7.

8

25

8.

11

15

9.

17

30

10.

9

10

11.

3

16

12.

3

16

13.

43

77

14. 1

1

15

15.

4

27

16. 8

51

52

17. 1

9

40

18. 1

16

21

19.

17

60

20.

17

20

Exercise 6 (page 13)

1.

8

35

2. 2

2

9

3.

6

11

4.

5

12

5.

3

28

6.

3

5

7. 11 8.

1

13

9. 1

1

2

10.

8

15

11. 2

2

5

12.

5

12

13. 3

3

4

14.

12

23

15. 4

16.

3

4

17.

1

9

18. 13 19. 15 20.400litres


19. (a) £60,P£36,Q£16 22.2880litres

Exercise 7 (page 14)

1. 2

1

18

2. −

1

9

3. 1

1

6

4. 4

3

4

5.

13

20

6.

7

15

7. 4

19

20

8. 2 9. 7

1

3

10.

1

15

11. 4 12. 2

17

20

DOI: 10.1016/B978-1-85617-697-2.00040-5