HP 30b Professional, 20b Consultant Financial manual O1c23 I56c, 3 + 4 x 5 +

Table 2-2 Last Number

Keys	Display	Description
:u3I		Sets FIX= to 3.000

<<<<

<

II

Selects RPN as the operating mode.

O1c23

I56c

1

23

Inputs 1.23 and 56.123

+:d/

Adds 1.23 and 56.123, then divides the sum by the last number, 56.123. Returns results in the selected display format.

For more complex problems requiring two or more operations, you do not need to enter parentheses to set operational priority. Key in numbers and operations inside the parentheses first, followed by those outside of the parentheses. If a problem has more than one set of parentheses, start by working with the operations and numbers in the innermost parentheses and work out. For example, calculate:

(3 + 4) x (5 + 6)

One way to calculate this problem is to key in the numbers and operations within the parentheses first, followed by the operation outside of the parentheses. See Table 2-3.

Mathematical Calculations 15