HP 113394 User Guide - Page 237
Algebraic Mode ALG
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Appendix B Algebraic Mode (ALG) Although most of this material is included at the appropriate places throughout this manual, it is collected here for easy reference. To select algebraic mode, press f[. When the calculator is in algebraic mode, the ALG status indicator is lit. Note: In ALG mode, it is a good idea to begin calculations by pressing OO. This will ensure that there are no pending arithmetic calculations that might interfere with the solution of a new problem. The reason this key is pressed twice is that pressing it the first time clears the display and X-register only, allowing you to correct an erroneous entry by keying in a correct number. The second press of O will clear any pending operations as well. Pressing the } key is another way to ensure that there are no pending operations before beginning a new calculation. Simple Arithmetic Calculations in ALG Mode To calculate 21.1 + 23.8: Keystrokes (ALG mode) OO 21.1+ Display 0.00 21.10 23.8 } 23.8 44.90 Clears any pending operations. Enters first number and prepares to add. Enters the second number. } completes the calculation. Once a calculation has been completed: z pressing another digit key starts a new calculation, or z pressing an operator key continues the calculation. Keystrokes (ALG mode) Display OO 77.35- 0.00 77.35 Clears any pending operations. Enters first number and prepares to subtract. 237 File name: hp 12c pt_user's guide_English_HDPMF123E27 Page: 237 of 275 Printed Date: 2005/8/1 Dimension: 14.8 cm x 21 cm