26 Section 1: Getting Started

Chain Calculations in ALG Mode

To do a chain calculation, you don’t need to press } after each operation, but only at the very end.

For instance, to calculate 750x12 you can enter either: 360

z750 §12 }z360 }or

z750 §12 z360 }

In the second case, the zkey acts like the }key by displaying the result of 750 × 12.

Here’s a longer chain calculation: 456 75 68 18.5 1.9

This calculation can be written as: 456 – 75 ÷ 18.5 × 68 ÷ 1.9. Watch what happens in the display as you key it in:

Keystrokes

Display

 

(ALG mode)

 

 

 

OO

0.00

Clears any pending operations.

456-75z

381.00

Subtracts 75 from 456.

18.5§

20.59

Divides 381 by 18.5.

68z

1,400.43

Multiplies by 68.

1.9}

737.07

Divides by 1.9 and displays the

 

 

result.

Parentheses Calculations

In ALG mode, parentheses can be used in calculations to change the order in which operations are evaluated. When there are pending open parentheses, the ( ) status indicator will be shown in the display. As open parentheses are closed, the expression contained within the parentheses is evaluated, from left to right. The final result of a calculation will be displayed when you press the ³key, and then any pending parentheses will be closed. You can’t use more than 13 pending (opened) parentheses at the same time.

For example, suppose you want to calculate:

8

(5 1)

Keying 8 ÷ 5 – 1 will calculate 8 ÷ 5 first and then the result (1.6) will have 1 subtracted from it (resulting in 0.6), which is not what is intended.

File name: hp 12c pt_user's guide_English_HDPMF123E27

Page: 26 of 275

Printed Date: 2005/8/1

Dimension: 14.8 cm x 21 cm

Page 26
Image 26
HP 12C Financial 12C manual Chain Calculations in ALG Mode, Parentheses Calculations