Casio ~ FX-991MS ~ Scientific Calculator 

~ Dual Power ~ Preowned ~ Non Programmable

Comes with slide-on hard case

Non Programmable calculators to perform various mathematical calculations.

  • Standard Models
  • 401 FUNCTIONS
  • 2-LINE DISPLAY

  • Two-way power (Solar + Battery)

    Solar powered when light is sufficient, battery powered when light is insufficient.

  • Plastic keys

    Designed and engineered for easy operation.

  • S-V.P.A.M. (Super Visually Perfect Algebraic Method)

    All the features of the existing V.P.A.M. series plus a new 2-line display and a useful Replay function. All this helps to make mathematics easier to use and easier to understand than ever before.

  • STAT-data editor

    Back-step viewing and editing of input data.

  • Multi-replay

    Quick and easy recall of previously executed formulas for editing and re-execution.

  • 10 + 2 digits

  • 10-digit mantissa + 2-digit exponential display.

  • Dot matrix display

  • High-resolution screen provides beautiful looking graphs every time.

Features


  • Fraction calculations
  • Combination and permutation
  • Statistics (STAT-data editor, Standard deviation, Regression analysis)
  • 9 variable memories
  • Equation calculations
  • Integration/differential calculations
  • Base-n calculations/conversions
  • Complex number calculations
  • Matrix calculations
  • Vector calculations
  • 40 scientific constants
  • Comes with slide-on hard case

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