Page 181 - Mathematics_F1

Chapter Three

Exercise 3.1

1. (a) 8,000 (b) 12,000 (c) 14,000 (d) 101,000 (e) 18,000
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(f) 2,350,000 (g) 60,000 (h) 10,000 (i) 1,235,000
3. (a) 30 (b) 20 (c) 30 (d) 10
(e) 50 (f) 30 (g) 20 (h) 310
5. 237,000 pupils
7. (a) 157.9 (b) 10.0 (c) 0.3 (d) 294.5
9. (a) 688.9341 (b) (i) 688.93 (ii) 688.9 (iii) 700
Tanzania Institute of Education
11. (a) 12,000 m (b) 38.3 m

Exercise 3.2

1. (a) 4 000.0 (b) 19.9 (c) 0.008
(d) 25.3545 (e) 0.0100 (f) 10.010
3. (a) 0.08 (b) 5.07 (c) 1.70 (d) 0.72
(e) 12.05 (f) 3.35 (g) 3.61 (h) 0.01 (i) 72.79
5. (a) 3.1 (b) 0.7 (c) 250.7
(d) 0.1 (e) 0.7 (f) 10.4
7. 18.03
9. (a) 0.0028 (b) 20.04 (c) 0.172
(d) 6.010 (e) 2.1
11. 9.860 m 2

Exercise 3.3

1. (a) 5 (b) 10 (c) 3 (d) 8
(e) 8 (f) 3 (g) 7 (h) 5
3. (a) 1.923 (b) 0.714
(a) 0.612 (b) 100 (c) 35.51 (d) 7.44 (e) 16.6
5.
Mathematics Form One 7. (a) 12.78 (b) 320 (c) 0.00714 (d) 37.20 (e) 40
(f) 493.0

(f) 399.6
20,000 to 1 significant figure
9.
25,000 to 2 significant figures
Therefore 25,000 will be reported because it is the nearest value to the
actual value 24,582

174

25/09/2025 15:02:08
Mathematics form 1.indd 174
Mathematics form 1.indd 174 25/09/2025 15:02:08