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15


Find the value of each of the following without using (b) – 0.008
3
a calculator. 8


3
3
(a) 0.027 (b) – 0.008 = 3 – 1 000
2
= 3 1 – 10 2 3 CHAPTER

3
3
– 0.008
(a) 0.027 Express as a cube (b)  2
3
3
= 0.3 in terms of other = (– 0.2) = – 10 3
 3
 3
= 0.3 decimal number. = – 0.2 = − 0.2
Self Practice 3.2d

3
3
3
1. Given 9 261 = 3 × 7 , find 9 261 without using a calculator.

3
2. Find 2 744 by using the prime factorisation method.
3. Find the value of each of the following without using a calculator.



3
3
3
3
–1 000
(a) 27 (b) –125 (c) 343 (d) 
4. Find the value of each of the following without using a calculator.
8 1 24 61
(a) 3 (b) 3 – (c) 3 (d) 3 1
125 27 81 64



3
3
3
3
(e) 0.001 (f)  (g) – 0.216 (h) 0.000343
– 0.064
How do you determine the cube root of a
number using technological tools? LEARNING
STANDARDS
16 Determine the cube
root of a number using
Calculate the value of each of the following by using a technological tools.
calculator. Give your answer correct to two decimal places.

3
3
–104.8
(a) 24 (b)  (c) 3 –1 2
9


3
3
(a) 24 = 2.88 (2 d.p.) Press  2 4 =

3

(b) –104.8 = – 4.71 (2 d.p.) Press 3  (–) 1 0 4 · 8 =
2
(c) 3 –1 = –1.07 (2 d.p.) Press 3  (–) 1 a c 2 a c 9 =

b
b

9
65
Squares, Square Roots, Cubes and Cube Roots
03 TB Math F1.indd 65 11/10/16 12:10 PM