Page 176 - Mathematics

Exercise 2.4

π
1. 11, 3+ 7, 12, 33 − 5 1.101001000100001…, − 7 and 2

are irrational because when expressed as decimals, the decimal digits
continue infinitely without any repeating pattern.
0.65 and 9 are rational numbers because they can be expressed in the
a
form .
b
Tanzania Institute of Education
3. (a) Whole numbers 0, 9

(b) Integers 0, 5, 9−

3
 
(c) Rational numbers − 5, − 3.5, 0, , 9, − 4.325
4
2
(d) Irrational numbers 3, 5, π , .
2

5. 10 m
π

Exercise 2.5

1. (a) True (b) True (c) False (d) False (e) True
(f) True (g) False (h) False (i) True (j) False
3. (a) 1, 2, 3, 4, 5
(b) 0, 1, 2, 3, 4
(c) 5, 7, 9, 11, 13, …
(d) –2, –1, 0, 1, 2, 3, 4
5. 0, 1, 2, 3, 4, 5.
Mathematics Form One 9. − 7 and 8−
7. Ester’s height < Nancy’s height and Nancy’s height > Hyasinta’s height.

170

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