HP HP-67

Getting Started 31
Whether selected as a default function or as a prefixed function, (=] is
an example of a one-number function; that is, a key that operates upon
a single number. All function keys in the HP-67 operate upon either
one number or two numbers at a time (except for statistics keys like 553
and (s)—more about these later).
Function keys operate upon either one number or two
numbers.
One-Number Functions
To use any one-number function key:
1. Key in the number.
2. Press the function key (or press the prefix key, then the function
key).
For example, to use the one-number function key, you first key in
the number represented by x, then press the function key. To calculate
Y%, key in 4 (the x-number) and press [§ (4.
Press Display
4
0 0.25
Now try these other one-number function problems. Remember,
first key in the number, then press the function:
1
—5 =
V2500
=
108 = (Use the (10¥) key.)
/3204100 =
log
12.58925411
=
712 =