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SECTION 1: BASIC
KEYS AND FUNCTIONS
We'll begin with a brief look at the basic ''chassis" on your calculator,
before we go on to check out the 'extra options''. These basics are what
allow you to get information into and out of the machine — and let you
handle the arithmetic part of mathematics quickly and accurately.
Tre DispLay
Whenever you first turn on your calculator, you should see a single zero
in the display indicating that all is well, the machine's on, and it's ready
for action. Just turning the calculator OFF and ON clears everything
inside. To check out your calculator's display, press the [8] key, the
decimal point key [+], the change sign key 4], and then push the [8] key
until the whole display is lit up. You can enter up to 8 digits into your
calculator at any one time, for both positive and negative numbers.
(Entries after the 8th digit are ignored.) For extra accuracy, however,
results of calculations are computed to eleven digits inside your
calculator, and then rounded off to 8 digits in the display. Notice that the
negative sign stays immediately to the left of any negative number in the
display, for easy reading.
To continue the tour press the clear key Gig) in the upper right corner of
keyboard, and read on.
AND [INV]: Tue "Dua. Function" Keys
Your calculator is loaded with functions to make all sorts of calculations
easy and accurate. To allow you access to all of this power, without
loading the machine with keys, many of the calculator keys have more
than one function. The first function of the key is printed right on it. To
use the first function on any key — just press it. The second function of
a key is printed right above it. To use second functions, just press the [2nd]
key, (upper left on the keyboard), and then the key right below the
function you wish to use. (We'll indicate second functions in this book
with a black background key MM. For example, to put a 7 in the display
you'll use the key sequence
)
The inverse key — [iN¥) — also provides additional calculator functions
without increasing the number of keys on the keyboard. The [IW] key
"reverses" the purpose or function of certain keys. Note: In cases where
you need to use both the [2d] and [IW) keys — you can use them in either
order and get the same result. If you use the [IN] before a function with
no inverse, it's simply ignored.
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