Scientific Notation - HP 40G User Manual

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Scientific
notation
(powers of 10)
Example
Explicit and
implicit
multiplication
H I N T
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4
× ×
A number like 5 10 or 3.21 10
notation, that is, in terms of powers of ten. This is simpler to
work with than 50000 or 0.000000321. To enter numbers like
these, use . (This is easier than using
EEX
– 13 23
( × ) 6 10 ( × )
4 10
----------------------------------------------------
Calculate
5 –
×
3 10
4
EEX
13
6
EEX
23 3
EEX
5
Implied multiplication takes place when two operands appear
with no operator in between. If you enter AB, for example, the
result is A*B.
However, for clarity, it is better to include the multiplication
sign where you expect multiplication in an expression. It is
clearest to enter AB as A*B.
Implied multiplication will not always work as expected. For
example, entering A(B+4) will not give A*(B+4). Instead
an error message is displayed: "Invalid User Function". This
is because the calculator interprets A(B+4) as meaning
'evaluate function A at the value B+4', and function A does
not exist. When in doubt, insert the * sign manually.
7 –
is written in scientific
10 .)
1-19