HP 33s - Manual (Page 106)

6–14 Entering and Evaluating Equations
Order Operation Example
1 Functions and Parentheses
1%-2, 1%-2
2 Power ( ) %:
3 Unary Minus ( ^ )
.
4 Multiply and Divide
%º&, ª
5 Add and Subtract
- , .
6 Equality
/
So, for example, all operations inside parentheses are performed before
operations outside the parentheses.
Examples:
Equations Meaning
º:/ a × (b 3
) = c
1º2:/ (a × b) 3
= c
-ª/ a + (b/c) = 12
1-2ª/ (a + b) / c = 12
01!-(. 2: [%CHG ((t + 12), (a – 6)) ] 2
You can't use parentheses for implied multiplication. For example, the expression
p
(1 – f) must be entered as º1.2, with the "º" operator inserted between P
and the left parenthesis.