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Self Practice 1.4a (c) 3 409 (d) –3 5 11.
648 24 –10
1. (a)
Self Practice 1.5c –30 –60
–1 –0.7 –0.3 0 0.2 0.6 1
1. RM10.05 million 3 6
(b)
2. 0.925 m
–2 –1.3 –0.4 0 0.3 0.7 1 24 3
Mastery 1.5
2. (a) 4 1
–2 –1.84 –1.62 –1.46 –1.20 –1 1. (a) –20 5 8 2
6
(b) 11 or other valid answers
(b) 17
–0.5 –0.39 –0.25 –0.17 –0.08 0 12 Chapter 2 Factors and
2. (a) –5.7, –6.8 Multiples
Self Practice 1.4b
(b) – 1 Self Practice 2.1a
1. (a) –1.48, –1.23, –0.034, 0.34, 8
1.034 3. (a) 1 238 1. (a) No (b) Yes
(b) –1.654, –1.546, –1.456, 77 (c) Yes (d) Yes
1.456, 1.564 (b) 100 (e) Yes (f) Yes
(g) Yes (h) No
2. (a) 2.522, 2.452, –2.005, 4. Jia Kang is at a level 2.2 m
–2.052, –2.505 2. (a) 1, 3, 5, 15
lower than Ishak. (b) 1, 2, 4, 8, 16, 32
(b) 0.621, 0.065, –0.068, Suresh is at a level 1 17 m (c) 1, 2, 4, 5, 8, 10, 20, 40
–0.639, –0.647 60
lower than Ishak. (d) 1, 2, 3, 4, 6, 8, 12, 16, 24, 48
Self Practice 1.4c (e) 1, 3, 17, 51
Let’s Practise (f) 1, 3, 29, 87
1. (a) 2.36 (b) – 43.75 (g) 1, 2, 7, 14, 49, 98
(c) 1.68 (d) –27.72 1. B
(e) 1.77 (f) 2.23 2. (a) 1 (h) 1, 2, 4, 31, 62, 124
100 Self Practice 2.1b
Self Practice 1.4d (b) – 4.3
1. RM19.85 (c) 2.5 1. (a) 3 and 5 are prime factors of 30.
7 is not a prime factor of 30.
2. 30.2°C 3. –2 (b) 3 is a prime factor of 54.
5 and 9 are not the prime
Mastery 1.4 4. 348 years factors of 54.
1. 1.2 + 1.5 – 5.2; 5. Mass of alms for each victim 2. (a) 2, 3 (b) 2, 3
0.4 – 2.1 + (–0.8); = 2 + + 0.4 (c) 2, 29 (d) 3, 11
1
–0.2 × 4.5 ÷ 0.36; 2 3. (a) 42 = 2 × 3 × 7
or other valid answers = 29 kg (b) 96 = 2 × 2 × 2 × 2 × 2 × 3
10
2. (a) –0.6, 0 (b) 4.2, –33.6 (c) 120 = 2 × 2 × 2 × 3 × 5
Mass of alms in three vans (d) 135 = 3 × 3 × 3 × 5
3. (a) –1.84 (b) – 6.2 29
4. (a) RM0.70 (b) RM4.10 = 80 × 10 Self Practice 2.1c
5. 15.64 m = 232 kg 1. (a) Yes (b) Yes
(c) No (d) Yes
Self Practice 1.5a Mass of alms in a van
= 232 ÷ 3 (e) Yes (f) No
–2 8 –12 153 12 –21
1. , , , , , = 77.33 kg 2. (a) 1, 2, 3, 6
4 7 15 20 5 5 (b) 1, 2, 3, 4, 6, 8, 12, 24
–2 8 –1.2 2 6. (a) –, +
Thus, , , , 7.65, 2 , (c) 1, 5, 7, 35
4 7 1.5 5 (b) +, – (d) 1, 2
–4.2 are rational numbers.
7. –7°C (e) 1, 5
Self Practice 1.5b 8. 0.75 m towards right of O (f) 1, 2, 3, 4, 6, 12
(g) 1, 2
4 1 9. Moves 5.6 m towards west
1. (a) –1 (b) (h) 1, 2, 3, 4, 6, 12
5 16 10. 14.7 m below level H (i) 1, 2, 5, 10

308
Answers

14 Ans Math F1.indd 308 11/10/16 12:23 PM