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ANSWERS

Chapter 1 Rational Numbers Self Practice 1.2a Self Practice 1.3a
1. (a) 8 (b) –7 1. (a)
Self Practice 1.1a
(c) 1 (d) 2 –1 3 1 0 1 1 1
1. (a) +1 000 m, –250 m (e) –10 (f) 3 – 5 – 5 10 2
(b) +RM2 000, –RM500 (g) 13 (h) –2
(b)
Self Practice 1.1b Self Practice 1.2b
–2 –1 2 –1 – 1 0 1 1 1
1. 7 3 3 7 3 3 7 3 7 3 1. (a) 18 (b) –14 3 3 6 2
(c) –32 (d) –48
2. (e) –4 (f) 3 Self Practice 1.3b
48 (g) –3 (h) –5
5
5
1
–12 – 6 1. (a) – , – 12 , – , 7 , 3
4 24 8
6
Integer Self Practice 1.2c
2
5
, ,
(b) – , – 13 , – , – 15 1 5
0 458 1. (a) –18 (b) –24 6 18 3 24 3 8
59 (c) 1 (d) –3
, , – , –
1 2. (a) 5 3 1 7 , – 5
(e) 39 (f) 3 6 5 8 20 12
11
Self Practice 1.1c Self Practice 1.2d (b) 11 2 7 , – , – ,
1
5
, , –
1. (a) 18 9 18 2 9
1. (a) 426 (b) 56 700 7
–5 –3 1 5 (c) 452 120 (d) 1 380 – 12
(b) (e) 6 (f) 4 495
Self Practice 1.3c
–10 –8 0 2 Self Practice 1.2e
1. (a) 1 13 (b) – 4 13
2. (a) 1. A loss of RM9 200 120 18
2. (a) 26°C (b) 32°C 7 2
–12 –8 –4 0 4 8 (c) (d) 7
Mastery 1.2 12 7
7
(b) (e) 1 (f) –2 71
1. –12 + (–2); 8 240
–56 –48 –40 –32 –24 –16
6 × (–2) – 2; Self Practice 1.3d
5 – 11 – 8;
1
Self Practice 1.1d –2 × (–3) – 15 – 5; 1. 22 cups
1. –6, –4, –2, 0, 1, 3, 5 8 × (–2) + 2; 2
2. 4, 3, 2, –1, –3, –4, –5 or other valid answers 2. RM1 080
Mastery 1.1 2. (a) × , – Mastery 1.3
4
1. (a) 20 m below sea level (b) ÷ , – 1. 1 – + 1 ;
(b) a movement of 90 m to the 3. (a) –5, –1, 3 5 5 10
1
2
south (b) –8, 64, –128 3 ÷ × – 2 2 ;
(c) – 800 10 5 3
3
6
(d) –1 000 4. (a) –23°C 3 ÷ – 1 ;
(b) –11°C 2 5 4
2. (a) – 80
(b) +76 5. Below sea level = –50 m or other valid answers
After 2 minutes
3. (a) –8, –7, –6, –5, –4, –3, –2, 2. (a) 2 (b) 5
–1, 0, 1, 2, 3, 4 = –50 + 120 × 2 3 216
1
(b) –12, –11, –10, –9, –8, –7, = –2 m 5 3. (a) –2 (b) –8
–6, –5, –4, –3, –2 The diver had not reached the 3
4. Integer: –14, 12, –26, 85, 0, –2 sea surface after 2 minutes. 4. 3 7 m
Not integers: 3.9 6. (a) Cheque valued at RM1 730 30

5. –4 °C, –3 °C, 1 °C, 2 °C, 4 °C (b) RM1 382 5. 128 ml
307
Answers
14 Ans Math F1.indd 307 11/10/16 12:23 PM