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Basic Controls

The display shows your expression history and a map of the current keypad functions.  Nominally the keypad is used to enter number or a decimal point (the * key).  To enter other functions, tap the # key.  This changes the border on the key map.  When the border color matches the function color, press the corresponding key.

Other basic controls are shown below.

 

Entering Expressions

To enter  10.3sin(4+2)  you would press

Keys Description
1 0  
* the "*" key nominally enter a decimal point
3  
# # 1 press the # (shift) key twice. This changes the key map border to green, which corresponds to the "sin" function. The 1 key then enters "sin("
4  
# * this enters a "+"
2  
# 3 this enters a ")"
ENTER press the enter button to evaluate the expression

 

Editing Expressions

To edit an expression, use the Up-Down controls to select the desired expression.  Then press Backspace or the Left-Right controls to edit the expression. 

  • Backspace deletes the currently selected text
  • Left-Right moves the cursor and automatically selecting text blocks
  • Other keys enters text after the currently selected text.  Remember you may need to press the # to select different functions