CASIO FX-991MS 2nd Edition Scientific Calculator

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 The MS series is reborn. 

Face your math challenges with confidence - take on any equation with the fx-991 MS 2nd Edition scientific calculator from CASIO. With its user-friendly design and advanced functions, you'll slash your calculation time in half. Venture forward with one of the best scientific calculators and conquer any math problem!


  • Design Simple and easy to use: Optimal education tools realized through a design that emphasizes comfort in the hand, legibility, and usability through the pursuit of simplicity
  • Instantaneous key recognition and ease of operation, the result of careful attention to design details
  • More comfortable in the hand: A rounded design that fits naturally in the hand and a slim body that's comfortable to hold
  • Attachable and detachable in any direction: Hard case that's attachable and detachable in any direction for greater ease of use
  • Easier to use: Highly visible, easy-to-press cursor keys and function keys


  • Natural-V.P.A.M.
  • Dot matrix display
  • 15 and 10+2 digits
  • 417 functions
  • Equation solver
  • 20 pairs of values for metric conversion
  • Calculation with complex numbers
  • Calc key (temporary formula memory)
  • 40 physical constants
  • Matrix/vector calculation
  • Numerical integral & differential calculus
  • Random Integers
  • New equation Mode
  • Function table
  • Two-Way-Power
  • Non-Programmable Scientific Calculator with 401 Functions with 2-line Display. Comes with slide-on hard case
  • 2nd edition comes same features with new sleek Design with curved edges which makes it compact and easy to carry
  • 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
  • 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.
  • Solves Differentiation, Integration, Statistics, Regression, Matrix, Vector