Calculators

Casio FX-991ES Plus 2nd edition Calculator Scientific 12 Digits in Black Color FX 991 ES PLUS 2E

Key features:

  • FULL DOT 2-line display
  • 40 scientific constants
  • 20 metric conversions
  • 9 variable memories
  • 24 levels of parentheses
  • Fraction calculations
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26,80
Express deliveryTomorrow, 04 February
+14,00 €shipping cost - sent from Greece

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from 26,80 €

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  1. Official reseller
    26,80 €

  2. 38,38 €

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  10. 39,90 €

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  12. 45,90 €

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  14. Official reseller
    36,90 €

  15. 33,90 €

  16. 46,50 €

  17. 31,51 €

  18. 38,95 €

Description

  • Power: Batteries: Solar + 1 x LR44 battery / Auto Power Off
  • Number of rows: 2
  • Repeat function
  • 40 scientific constants
  • 20 metric system conversions
  • 9 variable memories
  • Calculation and problem-solving programs
  • 24 levels of parentheses
  • Operations with fractions
  • Binary, octal, decimal, hexadecimal system conversions/calculations
  • Algebraic logic (AND/OR/...)
  • Measurement of angles in DEG/RAD/GRAD
  • Conversion between > DEG/>RAD/>GRAD
  • Conversion between polar and rectangular coordinates (Pol↔Rec)
  • Trigonometric calculations dd/syn/eq/eq-¹ /syn-¹/eq-¹
  • Hyperbolic functions hmh/synh/effh/effh-¹ /synh-¹/effh-¹
  • Exponential and logarithmic functions, ln, 10x, ex
  • Mathematical calculations, √,x²,x³,x³,x!,xy, x1/y
  • Calculations of percentages (%)
  • Engineering symbols ENG/ENG
  • Random number calculations
  • Statistical calculations
  • Calculations of sums Σ (Σx,Σx², x )
  • Calculations of sums Σx, Σy,Σx²,Sy²,Σxy, x, y
  • Calculations with integrals/differences
  • Transposition (nPr), Combination (nCr)
  • Matrix calculations
  • Dimensions: 16.2x8 cm

Screen

  • FULL DOT 2-line display
  • 15 digits on the top line and 10+2 digits on the bottom
  • Replay function
  • 417 functions
  • 40 scientific constants
  • 20 metric conversions
  • 9 variable memories
  • Dual power: Solar / 1 x LR44 / Auto power off

Calculation and Problem-Solving Programs

  • 24 levels of parentheses
  • Fraction calculations
  • Binary, octal, decimal, hexadecimal conversions/calculations
  • Algebraic logic
  • Angle measurement in DEG/RAD/GRAD
  • Conversion between > DEG/>RAD/>GRAD
  • Conversion between polar and rectangular coordinates (Pol#Rec)
  • Trigonometric calculations
  • Hyperbolic functions
  • Exponential and logarithmic functions, ln, 10x, ex
  • Mathematical calculations, #,x²,x³,x!,xy, x1/y
  • Percentage (%) calculations
  • Engineering symbols ENG/ENG

Calculations

  • Random number calculations
  • Statistical calculations
  • Sum calculations Σ (Σx, Σx², x)
  • Sum calculations Σx, Σy, Σx², Sy², Σxy, x, y
  • Integral/Differential calculations
  • Permutation (nPr), Combination (nCr)
  • Visually perfect algebraic logic (Natural-V.P.A.M.)
  • Matrix calculations

Specifications

  • Weight: 95gr
  • Dimensions: 77x161.5x11x1cm
  • 12 digits

Manufacturer

Specifications

Type
Scientific
Power Source
Solar/Battery
Lines
2
Display Digits
12
Pocket
No
Colour
Black

Important information

Specifications are collected from official manufacturer websites. Please verify the specifications before proceeding with your final purchase. If you notice any problem you can report it here.

Reviews

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Reviews by our members

  • quite good, I got it for university use. Of course, for 27 euros, I don't know if it's worth it. Definitely as a calculator, I think this is the most value for money for simple academic use. Beyond that, there are apps on mobile and computer, which for much less money do things better than calculators costing 150€. For a student who just wants to get through exams, it's perfect. But if you want to engage with mathematics, you need to move on to computational programs that are much more powerful and user-friendly.

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  • leonidasmpoutas
    2
    0 out of 1 members found this review helpful

    Verified purchase

    It's definitely for very simple things, certainly not for university use. It calculates producers only for a fixed value of X, integrals only with one variable and not indefinite. In other words, you don't even need a calculator for these; you think of them faster than you can write them down. For the €27 I paid, it was definitely not worth it; if it were half the price, yes. Given the price, I expected the buttons to respond a little better.

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  • mpouliozk
    5
    3 out of 3 members found this review helpful

    Verified purchase

    Excellent for students of the exact sciences. It performs matrix operations, solves linear systems, equations, and inequalities.

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  • Andreas_Papadamou
    5
    1 out of 2 members found this review helpful

    Verified purchase

    Excellent calculator. With all the basic functions, suitable for middle school and high school students as well as later on.
    Easy to use and understandable.

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  • GiannisNakas
    5
    3 out of 3 members found this review helpful

    Verified purchase

    I bought it for my school and I didn't regret the money for a single minute. It can handle very difficult calculations, from mathematics to physics, and its battery is flawless.

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  • nbampaliaris
    5
    10 out of 10 members found this review helpful

    Verified purchase

    Very good! It even solves integrals! It saved my hands during the unacceptable remote exam where I had to solve 4 problems of infinite calculus in 1 hour...

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  • David_Akoda
    5
    2 out of 6 members found this review helpful

    Verified purchase

    A very good computer that is worth its money, it does its job very well and with a very nice color.

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  • Costas_Papapanos
    4
    8 out of 8 members found this review helpful

    Excellent for its price! The second best among the non-programmable calculators on the market. (the first one being the 991EX).

    P.S. Crazy market fact: This version (the second one) is 10 euros cheaper than the first one!!!

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  • Verified purchase

    By far the most user-friendly calculator from Casio. Easy to use (exams) and very cheap?

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  • Verified purchase

    Purchased for educational use. I relied on the very good reviews I read and I do not regret it.

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  • excellent

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    • Construction quality
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    • Calculation Speed
    • Reliability of results
    • Battery life
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  • Excellent for scientific use

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  • Verified purchase

    Excellent calculator for complex calculations.

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  • Verified purchase

    Very good for university use. I highly recommend it.

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  • Many possibilities.
    Quite good construction

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  • A little expensive but very good

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  • Verified purchase

    Nice little computer at a very good price.

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  • Verified purchase

    Excellent little computer. Sufficient uses for its price.

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  • 5
    3 out of 4 members found this review helpful

    Verified purchase

    With this little computer, you can and will manage to pass the SE exams!

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  • Verified purchase

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  • Verified purchase

    • Construction quality
    • Screen clarity
    • Calculation Speed
    • Reliability of results
    • Value for money
    • Battery life
  • Verified purchase

  • Verified purchase

    • Construction quality
    • Screen clarity
    • Calculation Speed
    • Reliability of results
    • Battery life
    • Value for money
  • Verified purchase

  • Verified purchase

    • Construction quality
    • Calculation Speed
    • Reliability of results
    • Battery life
    • Value for money
    • Screen clarity
  • Verified purchase