Sunday, December 29, 2019

Retro Review: Casio fx-280 FRACTION

Retro Review:  Casio fx-280 FRACTION

Quick Facts:

Model:  fx-280 FRACTION
Company:  Casio
Type:  Scientific
Years:  Introduced 1995 (mid 1990s)
Display:  10 digits
Batteries:  Solar with Battery backup, LR 44

Special thanks to Tom Manning for furnishing this calculator.  Much appreciated. 

A Bigger fx-260 Solar (II)

The Casio fx-280 FRACTION is a variation of the Casio fx-260 Solar and the fx-260 Solar II.  The modes and features are:

*  Trigonometric Functions
*  Angle Conversions:  polar, rectangular, degrees/radians/grads
*  Random Numbers
*  Logarithms and exponents
*  1 Variable Statistics
*  Fractions
*  DMS/Decimal conversions

Like the great fx-260 Solar, the fx-280 calculator is an impressive basic scientific calculator, handy for both beginners and experts.  You can check my review for the fx-260 Solar II here:

Any Differences?

Yes.  The main difference is that the fx-280 has three memory registers:  A, B, and M.   Only memory M has storage addition.  Memories A, B, and M are assigned to the [ ( ], [ ) ], and [ x^y ] keys, respectively. 

The top row of keys has a [STO] (RCL)  (store/recall), pushing the [x^2] (√), [log] (10^x), and [ln] (e^x) keys to the right.  The fx-280 has no [ON] key, and the [AC] key acts as the ON key. 

The arithmetic keys, equals key, and M+/DATA key are blue instead of black.  The [ C ] and [AC] keys are red.

The fx-280 came with a quick reference card.

Thank you Tom! 


"Casio fx-280 (FRACTION)"  Retrieved December 11, 2019


All original content copyright, © 2011-2019.  Edward Shore.   Unauthorized use and/or unauthorized distribution for commercial purposes without express and written permission from the author is strictly prohibited.  This blog entry may be distributed for noncommercial purposes, provided that full credit is given to the author.

1 comment:

  1. This is an amazing little calculator. Dual power, got it about 20 years ago, and it's still plugging along, though the battery is obviously dead as it only works on solar. Easy to find what you need, no additional calculus/other things complicating it. I still prefer it for basic science and math functions over the calculator I got in later years for higher math.


Calculator Python: Lambda Functions

Calculator Python: Lambda Functions Introduction to Lambda Functions Lambda functions are a quick, one expression, one line, python function...