A c c u r a c y / D i s p l a y – Your calculator has
an eleven digit display. This is made up
of seven digits (normal display) and four
digits for the fraction. In a standard cal-
culation, each calculation is carried out
i n t e rnally to 10 digits and is rounded to
a 7-digit standard display. A 5/4 ro u n d-
ing technique is used to add 1 to the
least significant digit in the display if the
next non-displayed digit is five or more .
If this digit is less than five, no ro u n d i n g
o c c u r s .
“Error” – When you make an incorrect
entry, or the answer is beyond the
range of the calculator, it will display
the word “Error.” To clear an error
condition you must hit the [On/C] but-
ton twice. At this point you must
determine what caused the error and
re-key the problem. An “Error” condi-
tion will also occur if you enter a
mathematical impossibility such as
division by zero.
Auto-Range – If an “overflow” is creat-
ed because of an input and calculation
with small units that are out of the
standard 7-digit range of the display,
the answer will be automatically
expressed in the next larger units
(instead of showing “Error”) – i.e.,
10,000,000 millimeters cannot be dis-
APPENDIX
50 – HeavyCalc™
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