Page 183 - Mathematics_F1

Exercise 4.2

1. (a) 70, 30 (c) 6, 6, 4
21
(b) 45, 30 (d) ,
5 10
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3. Juma - Tshs 30,000, Ali - Tshs 18,000, Aisha - Tshs 12,000.
5. 2.1 kg
7. 40 kg of A, 32 kg of B
9. 50 kg
11. 9,100 litres
13. There are 312 coins for Tshs 500 coins, 1,170 coins for Tshs 200 coin
Tanzania Institute of Education
and 3,900 coins for Tshs 100 coin.
9n 2
15.
2

Revision exercise 4
2
1. (a) 5% (b) 0.5% (c) 9.8% (d) 75% (e) 66 %
3
3. Tshs 1,824,000 9. 60 15. 5.89 cm
5. 27 kg, 108 kg, 135 kg 11. 57.6 kg
7. 8.89 grams of chlorine 13. 20 cm 17. Tshs 4,200,000
19. (a) 7:9 (b) 56.25%

2 7 2
21. and 23. 25. Tshs 88,000
5 5 3
Chapter Five

Exercise 5.1

1. (a) 5n + 3k + 2x
(i) There are three terms.
(ii) The coefficient of n is 5, the coefficient of k is 3, and the
coefficient of x is 2.
Mathematics Form One (c) (ii) The coefficient of x is 6, the coefficient of y is – 3, and the
6x – 3y – 5z
(b)

(i) There are three terms.

coefficient of z is – 5.
1 _
10 x
4
(i) One term.

(ii) The coefficient of x is 10 .

4
176 1 _

21/10/2025 10:50:36
Mathematics form 1.indd 176 21/10/2025 10:50:36
Mathematics form 1.indd 176