Sharp EL-531LH - Page 14

Mastering the Calculator using the Sharp EL-531LH 11
Example
To square 6,
that is, find 6
2
, type
The display should read 36
[The first number you put in is the 6. This is the y and the second number you put in (2) is x.
That is why it is called the y
x
key.]
To find 27
3
the required key strokes are
and the display should read 19683.
If you have learnt your multiplication tables you will already know the squares of the whole
numbers from 1 to 12 and thus be able to complete much of the following table.
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Exercise 2
Use your calculator to find the squares of the whole numbers from 13 to 25 and any other
squares you are unsure of.
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1
2
= 1 11
2
= 21
2
=
2
2
= 4 12
2
= 22
2
=
3
2
= 9 13
2
= 23
2
= 529
4
2
= 14
2
= 24
2
= 576
5
2
= 15
2
= 25
2
= 625
6
2
= 16
2
=
7
2
= 17
2
=
8
2
= 18
2
=
9
2
= 19
2
=
10
2
20
2