HP 33S - Reusing Numbers with LAST X

RPN: The Automatic Memory Stack
2–9
File name 33s-English-Manual-040130-Publication(Edition 2).doc Page : 388
Printed Date : 2004/1/30 Size : 13.7 x 21.2 cm
Example:
Suppose you made a mistake while calculating
16
×
19 = 304
There are three kinds of mistakes you could have made:
Wrong
Calculation:
Mistake: Correction:
16
Ï
19
Ã
Wrong function
¹ Í Ù
¹
Í ¸
15
Ï
19
¸
Wrong first number 16
¹ Í ¸
16
Ï
18
¸
Wrong second number
¹ Í ¯
19
¸
Reusing Numbers with LAST X
You can use
¹ Í
to reuse a number (such as a constant) in a calculation.
Remember to enter the constant second, just before executing the arithmetic
operation, so that the constant is the last number in the X–register, and therefore
can be saved and retrieved with
¹ Í
.
Example:
Calculate
3947.52
3947.52704.96 +