HP 113394 User Guide - Page 26

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. 750 x12 For instance, to calculate 360 you can enter either: z 750 § 12 } z 360 } or z 750 § 12 z 360 } In the second case, the z key 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 (ALG mode) Display OO 456-75z 18.5§ 68z 1.9} 0.00 381.00 20.59 1,400.43 737.07 Clears any pending operations. Subtracts 75 from 456. Divides 381 by 18.5. Multiplies by 68. 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 ³ key, 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