Page 64 - C:\Users\azizu\Documents\Flip PDF Professional\Matematics-Form-1-1\

Self Practice 3.1c

1. Find the value of each of the following without using a calculator.
1
(a) 8 2 (b) – 5 2 2 (c) 1. 4 2
6
2. Find the value of each of the following by using a calculator.
9
(a) 29 2 (b) 1 2 2 (c) (–15.3) CHAPTER
2
11
3
How do you determine the square root of a number?
LEARNING
5 STANDARDS

Find the value of each of the following without using Determine the square
roots of a number
a calculator. without using

441
(a) 64 (b)  technological tools.



(a) 64 = 8 × 8 (b) 441 = 3 × 3 × 7 × 7
441
= 8 = 3 × 7 × 3 × 7
9 49 = 21 × 21
 
441 = 21 × 21
3 3 7 7 = 21
6

Find the value of each of the following without using a calculator.
4 7 27
0.36
(a) (b) 2 (c) (d) 
25 9 48
Prime factorisation is a
more systematic method
4 2 2 4  used to find the square
4
(a) = × (a) =
25 5 5 25  root of a larger number.
25
2
2
= 1 2 2 =  2
5
5
2  2
= 2
5 =
5
7 25 Change to improper
(b) 2 =
9 9 fraction first.
5
= 1 2 2 Think Smart
3
5 The square root of a
= number is the same as
3 the number itself. What
2 is that number?
= 1
3

53
Squares, Square Roots, Cubes and Cube Roots

03 TB Math F1.indd 53 11/10/16 12:09 PM