Square Root - Casio fx-82MS Manual Book

Exercise 3
You can use this key for other powers as well. Try these examples
4
(a) 7
10
(b) 8
6
(c) (0.4) (you do not have to type the brackets in)
6
(d) (–7) (you need to type the brackets in)
0.4
(e) 5
–4
(f) 5
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Answers:
(a) 2401
(b) 1073741824
(c) 4.096 × 10
–3
or 0.004096 (you move the decimal 3 places to the left)
(d)
(e) 1.903653939
(f) 0.0016 [Just press
1
---- - so you could press
4
5
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4.2 Square root

Finding the square root of a number 'undoes' or 'neutralises' the squaring of the number and
vice versa. The symbol for square root is
(This is called the radical sign)
The square root of 36 is written as
2
Now because 6 = 36,
Find the square root key on your calculator and type
117649
36
36 = 6 .
Mastering the Calculator using the Casio fx-82MS
–4
5 is the same as
to get the same answer]
13