Casio fx-115/MS scientific calculator

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The calculator.

  Casio fx-115/MS
Brand name Casio
Model number fx-115/MS

Logic system. Does your calculator use algebraic or RPN (reverse Polish notation) logic? How do you tell? An algebraic calculator has an = key; An RPN calculator has an ENTER key. To add two numbers (say, 2 & 3) on an algebraic calculator, you type the keys "2 + 3 =". On an RPN calculator, you type "2 ENTER 3 +".
  Casio fx-115/MS
Algebraic or RPN? Algebraic
Algebraic calculators can be further subdivided into AOS and DAL. If you know which type yours is, you can write that here. Otherwise, you will figure that out later on the form. DAL

  Casio fx-115/MS
What is the label on the "shift" key(s) Shift
Where is the shift key? top left

  Casio fx-115/MS
What is the label on the key for entering exponents? EXP
Where is that key? bottom row, center
When entering a number that starts with 1x in scientific notation, do you need to enter the 1? (e.g., 1x1012) no; just enter EXP 12
What is the key for making an exponent negative? (-)
Where is that key? far left column, 3rd key down (2 keys above the 7)

Scientific notation; display.

  Casio fx-115/MS


Press MODE key repeatedly until it shows you the screen for FIX/SCI/Norm. Choose as shown there, 1 = FIX, 2 = SCI, 3 = Norm.

If you choose FIX, you also choose the number of decimal places. If you choose SCI, you also choose the number of significant figures.


  Casio fx-115/MS
How is the log10 key labeled? LOG
How is the base 10 antilog key labeled? 10x. It is Shift LOG.
To take the log10 of 1000 which do you enter first, the number or the LOG key? The LOG key. That is, enter LOG 1000.

How are the keys labeled for natural logs and antilogs? LN

anti-log: ex. It is Shift LN.


  Casio fx-115/MS
Angles: degrees or radians

Shift ANS (DRG). Then press 1 for degrees, 2 for radians, 3 for grad.
Polar vs rectangular coordinates  


Dani Nolan

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Last update: September 17, 2011