Appendix B: Algebraic Mode (Alg); Simple Arithmetic Calculations In Alg Mode - HP 12C User Manual

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:
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+
23.8
}
Once a calculation has been completed:
pressing another digit key starts a new calculation, or
pressing an operator key continues the calculation.
Keystrokes
(ALG mode)
OO
77.35-
File name: hp 12c pt_user's guide_English_HDPMF123E27
Printed Date: 2005/8/1
Appendix B
In ALG mode, it is a good idea to begin calculations by pressing
Display
0.00
21.10
23.8
44.90
Display
0.00
77.35
237
Page: 237 of 275
Dimension: 14.8 cm x 21 cm
Clears any pending operations.
Enters first number and prepares to
add.
Enters the second number.
} completes the calculation.
Clears any pending operations.
Enters first number and prepares to
subtract.