hp calculators 
 
 
 
 
HP 35s  Using Algebraic Mode 
 
 
Calculation modes 
 
Functions of a single number in algebraic 
 
A simple example in algebraic 
 
Arithmetic calculations with two numbers 
 
Another example - the area of a piece of carpet 
 
Algebraic mode in detail 
 
Making corrections 
 
Functions of two numbers 
 
Algebraic operator precedence 
 
Example – reusing a previous result