All and more about Sharp
PC
-1500 at http://www.PC-1500.info
REME
MB
ER:
To
press @
i.)
between e<1lculations to
Clear
previous resul
ts
.
E. COMPOUND CALCULATIONS
You can string together a sequence
of
calcul
at
ions before a!ki
ng
SHARP
for
an answer. For
example, you and two friends. Hob a
nd
Nob,
wim
to
mare 5 apples twice a
day
for a week. How
many
apples should
YOU
buy
tO
last the week? 5 apples
[2J
3 friends QI;
")
2 per
day
7
days:
Ke
ystrokes
Display
23.
33333333
(Buy 24 apples
and
a parrot,
to
whom
you
can feed the extra
1/3
apple). Run the followi
ng
cal·
culations,
(but
th
is time invent your
ow
n stories
~s
to
what they represent) :
Input Display
5"'
2 - 3.675
l
lE
MTta
l
6.
325
5/3ll'6.2+7
- 47
,
....
. 1
-
29.
66666
667
F.
USE
OF
PARENTHESES
A problem which emerges as we
inv
estigate compound calcul
at
ions
is
that
of
pri
or
ity. For
instance, the
exp
ression 5 - 3 / 4 can be read
two
ways: (5 minus 3) divided
by
4, in which case
the answer
is
.
5.
or
5 minus (3 divided by 4), in which case the answer
is
4.25
.
Located in the first row
of
keys are the parentheses which
you
can use
to
clarify such
ambiguities. Run
the followi
ng
calculations:
Input Displ
ay
5-3/
4
ij
[HJ(
illl
l
4.
25
5 -
(3/4)
l
um•
I
4.
25
(5-3)/4
l tNfCRf
0.
5
SHARP is predisposed (has "default" priorities)
to
perform some calculations before others
(for a
complete listing
of
the order in which SHARP calculates, see Appendix 0). Division and
multiplication will be carried
out
before subtraction a
nd
addition, unless pare01hes
es
are used
to
dire
ct
a different ordering. Thus SHARP
is
built
to
interpret the first equati
on
above as being
equal
10
the second rather than
to
the third.
To
make sure
that
the answer SHARP gives
you
is
the
one
you need, use parentheses to indicate the proper order in which it should perform calcula·
tions.
SHARP can
in
terpr
et
several layers
of
parentheses as in
th
is problem:
17
Do
not sale this PDF!!!
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