Switching the calculator on  seems basic but if it does not switch
on the battery is probably flat !!


When you first press the
button this
is the display you should see.
Click here to see the switching
on and off buttons 

Then you must check that you are in the correct mode.
So press the
button


Then press 1  and the screen will look like this.
This is your starting point for all calculation. 
Simple mathematical calculation


Enter 2
9
3 and press the
result
6

You can see the problem shown on the top line as you enter
it, with the result after the
button is press on the bottom line.
This use of the two display lines is the same for all calculation.
The other simple mathematical functions of :
are used in the same way.
To give the reciprocal of a number we used this
key
see below
This is the decimal point button
Press
the
to CLEAR ALL and you are ready for the next calculation. 

Enter 2 then press
then press
the display is as shown 
Now let's introduce the
button

Let's say you want to express
270000 in terms of
k 

So turn on the calculator and enter 270000 

Press


Press the answer is
270 x 10^{3}
10^{3} = 1000 = k thus
270k 
The use of the
key press has made the calculator use its Exponential function and so long
as you know which exponential you are seeking you can read off the answer
directly. 
EXAMPLE
Let's say you want to express 0.001A in terms of mA 

So turn on the calculator and enter .001 Press the
and
you will see the display as at the left. 

Press and the screen
stays the same as it is already giving the answer in the correct exponential
milli amps 10^{3} that is 0.001 = 1mA or 1 x 10^{3} 

Press again and the
screen is then giving the answer not mA but in micro amps 10^{6}
1000 uA 

Press again and the
screen is then giving the answer not micro amps but in nano amps
10^{9} 1000000 nA 

Press again and the
screen is then giving the answer not nano amps but in pico amps
10^{12} 1000000000 pA 
milli 10^{3} 
micro 10^{6} 
nano 10^{9} 
pico 10^{12} 
From this you have learned that each press of the
button moves the decimal
point 3 places 