Appendix B: Algebraic Mode (Alg); Simple Arithmetic Calculations In Alg Mode - HP 12C Platinum 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:
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+
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-
Appendix B
Display
Clears any pending operations.
0.00
Enters first number and prepares to
21.10
add.
Enters the second number.
23.8
} completes the calculation.
44.90
Display
Clears any pending operations.
0.00
Enters first number and prepares to
77.35
subtract.
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