HP 33S - Fractions in Equations

5–8 Fractions
File name 33s-English-Manual-040130-Publication(Edition 2).doc Page : 388
Printed Date : 2004/1/30 Size : 13.7 x 21.2 cm
In an equation or program, the RND function does fractional rounding if
Fraction–display mode is active.
Example:
Suppose you have a 56
3
/
4
–inch space that you want to divide into six equal
sections. How wide is each section, assuming you can conveniently measure
1
/
16
–inch increments
?
What's the cumulative roundoff error
?
Keys: Display: Description:
16
º Ê

Sets up fraction format for
1
/
16
–inch increments. (Flags 8
and 9 should be the same as fo
r
the previous example.)
56
Ë
3
Ë
4
e
D
 
Stores the distance in D.
6
¯
 


The sections are a bit wider than
9
7
/
16
inches.
¹ f
 
Rounds the width to this value.
6
¸
 
Width of six sections.
h
D
Ã
 
The cumulative round off error.
º ·
{

} 8
 
Clears flag 8.
¹ É

Turns off Fraction–display mode.
Fractions in Equations
When you're typing an equation, you can't type a number as a fraction. When an
equation is displayed, all numeric values are shown as decimal values —
Fraction–display mode is ignored.
When you're evaluating an equation and you're prompted for variable values,
you may enter fractions — values are displayed using the current display format.
See chapter 6 for information about working with equations.
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