HP 33S - Page 51

RPN: The Automatic Memory Stack
2–11
File name 33s-E-Manual-1008-Publication(1st).doc Page : 386
Printed Date : 2003/10/8 Size : 13.7 x 21.2 cm
(12 + 3) = 15
… then you would multiply the intermediate result by 7:
(15)
×
7 = 105
Solve the problem in the same way on the HP 33s, starting inside the
parentheses:
Keys: Display: Description:
12
Ï
3
Ù

Calculates the intermediate result first.
You don't need to press
Ï
to save this intermediate result before
proceeding; since it is a calculated result, it is saved automatically.
Keys: Display: Description:
7
¸

Pressing the function key produces the
answer. This result can be used in
further calculations.
Now study the following examples. Remember that you need to press
Ï
only to separate sequentially–entered numbers, such as at the beginning of a
problem The operations themselves (
Ù
,
Ã
, etc.) separate subsequent
numbers and save intermediate results. The last result saved is the first one
retrieved as needed to carry out the calculation.
Calculate 2
÷
(3 + 10):
Keys: Display: Description:
3
Ï
10
Ù

Calculates (3 + 10) first.
2
w ¯

Puts 2 before 13 so the division is
correct: 2
÷
13.
Calculate 4
÷
[14 + (7
×
3) – 2] :
Keys: Display: Description:
7
Ï
3
¸

Calculates (7
×
3).
14
Ù
2
Ã

Calculates denominator.
4
w

Puts 4 before 33 in preparation for
division.
¯

Calculates 4
÷
33, the answer.