Page 30 - Math Smart - 7

.4.2 Square roots

Finding the square root of a number is the opposite of finding the square of a
number. The square root of a number is a value that can be multiplied by itself to
give that number.

Example 8
'O Spotlight squared

Most calculators have
a key like this® for or 4 = 16
finding the square root
VTe =4
of a number.
square root
squared

or 13 = 169

yw = 13
square root

We say that finding the square root of a number is the inverse operation of
finding the square of a number. The square of the number 4 is 16, and the
square root of 16 is 4. The square of the number 13 is 169, and the square
root of 169 is 13.

Check My
Understanding

O Complete the table without using a calculator.

1^= 1 □ Vi"=i
5^=25 V25 =5
2^ = 4 \^=2 II

V^ = 3 6^=36

4^= 16

UNIT 1 I Factors, Multiples and Primes