Page 43 - Mathematics

7. Find the absolute value in each of the following expressions.
1 + 1

(a) 2 × 3 9 (d) 6 + 1   4 ÷ 1 2 (g) 2 3

4
3 16 4  2  2 ++ 1 1
3 5 4 Tanzania Institute of Education
2 4 3
1 7  3  4  3 7  6 × 3 2 − 5
(b) 2 × ÷− 3  (e) − ×  + 4  (h)

28  4  5  7 10   2 2 4  3
 2 ×  −
 3 5 
3
1 
4 33
7
(c) −÷ (f) 5 − − + 3   (i) − 16  × − ×− 2  


5 25 2  11 5  8 9 
8. Write the following using the recurring decimal notation, hence convert
each of the decimals into fractions.
(a) 0.22442244… (d) 0.1010101010…
(b) 0.123123123123… (e) 2.153846153846…
(c) 1.578578578…
9. Write each of the following fractions into decimals.
5 29 5 40 7
(a) (c) 6 (e) 12 (g) 33 (i) 15
9

14 2 5 4 1
(b) (d) (f) (h) (j)
11 27 11 27 13


 
10. If x = 0.15 and y = 0.3, find the value in each of the following in fraction.
x y
(a) x y+ (b) (c)
y x
11. Identify each of the following as rational or irrational numbers.
90 1
0.75, , 7, 12,
12007 2 1
12. Identify whether or not, a mixed number 3− is rational.
13. Write all real numbers from 5 to 6. 2
2 24 1
14. A rational number N is equal to times the sum of and . Find
the number N. 5 7 14 Mathematics Form One
15. Identify fractions which are equivalent to each of the following decimals.
(a) 2.344444444… (b) 21.305305305305… (c) 0.17171717…

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Mathematics form 1.indd 37