HP 39gs Master Manual page 13

You can also use these memories in calculations. Type in the following,
not forgetting the
ALPHA
(3+D)/5 ENTER
The calculator will use the value of
haven't worked it out for yourself, the
multiply key .
More information on memories and detailed information on the
The menu is covered in detail on pages 165 but we will have a brief look now.
MATH
The left side of the menu lists the categories of functions. As you use the
up/down arrows to scroll through the topics, you'll see the actual list on
the right change. Move down through the menu until you reach Prob.
(short for Probability) and then one step more and you'll find yourself
back at Real. Now press the right arrow key and your highlight will
move into the right hand menu (see above). Move the highlight down
through this menu until you reach Round. Press
As you can see, the effect was to round off the answer of 4
3 decimal places. Entering
3 significant figures instead.
There are shortcuts for obtaining things from the
covered later (see page 41).
key before the ....
D
stored earlier in
12
symbol comes from the divide key
/
The calculator also comes with an immense number of mathematical
functions. They can all be obtained via menus through the
from the keyboard. Try pressing the
find your screen looks like the screen shot left.
ENTER
You should now be back
the display as shown right. You can also achieve the same effect by
using
ALPHA
do it that way.
Now type in:
would have rounded to
ROUND(4+D/18,-3)
MATH
to evaluate the expression (see image). In case you
D
view in general is given on pages 39.
HOME
MATH
.
, with the function
HOME
to type in the word letter by letter. Many people prefer to
and press
4+D/18,3) ENTER
. 666666.. to
menu that are
13
and the symbol from the
*
key or
MATH
key now and you should
entered in
ROUND(