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Casio FX-991ESPLUS Scientific Calculator

4.7 out of 5 stars 865 customer reviews
| 53 answered questions

RRP: £20.99
Price: £18.74 & FREE UK Delivery on orders dispatched by Amazon over £20. Delivery Details
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  • Scientific Calculator
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  • Solar Energy Driven
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Frequently bought together

  • Casio FX-991ESPLUS Scientific Calculator
  • +
  • Casio fx-911ES PLUS for High School Students
Total price: £23.24
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Product information

Technical Details
BrandCasio
Model Numbernull
Item Weight95 g
Product Dimensions18.5 x 8.7 x 3.5 cm
Batteries:1 LR44 batteries required. (included)
ColourSilver
Material Typeplastic
Number of Items1
Size1
Lines Per Page2
Manufacturer Part NumberFX-991ESPLUS-SA-UH
  
Technical Specification
Additional Information
ASINB0034BAQS8
Best Sellers Rank 439 in Office Products (See top 100)
Shipping Weight299 g
Date First Available17 May 2007
  
 

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Product Safety

This product is subject to specific safety warnings
  • Warning: Not suitable for children under 36 months

Product description

Box Contains

  • FX991ESPLUS

  • 3 year warranty card

  • Instructions

  • From the manufacturer


    Customer Questions & Answers

    Customer Reviews

    Top Customer Reviews

    Verified Purchase
    I am a third year university student studying mathematics. If you're looking for a calculator that does everything you could ever need bar drawing your graphs for you, then buy this one. It's lasted me years and is still in great condition. Has great features in the stats mode, including doing regression. Solves simultaneous equations, integrates, differentiates, does matrix operations. Quality product, I highly reccomend it.
    Comment 8 people found this helpful. Was this review helpful to you? Yes No Sending feedback...
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    Verified Purchase
    Good price for this calculator, and arrived quickly. Bought for an engineering degree as the complex number functionality is essential and will save minutes in an exam. Ability to solve simple definite integrals and differentials is handy too. Would recommend for anyone in higher education who is not permitted a graphing calculator.
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    Verified Purchase
    I am impressed by some features of this machine. For example you can calculate definite integrals, solve cubic equations, perform linear fitting to a set of data, etc. I really didn't expect this level of performance for a device costing under 20 pounds. Of course,nowdays, there are much more powerfull software packages for Mathematics and data analysis. However, when you are on the go and don't have access to a computer you can do some pretty advanced calculations with this device.

    As a Physicist I also liked the fact that it has in its memory most of the physical constants with a helpful table on the back cover. It can also perform unit conversions.

    Thumbs up for Casio!!!
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    Verified Purchase
    6 months into my Engineering course in University and this calculator is my BEST FRIEND! It is absolutely awesome and in my opinion the best one on the market so far that I've seen.
    Casio is my main go to brand for all watches and calculators, never let me down. 10/10
    Comment 2 people found this helpful. Was this review helpful to you? Yes No Sending feedback...
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    Verified Purchase
    In my honest opinion, this is the perfect non-graphics calculator. I have tried many and none of them seem to compare to this one, this calculator has numerical integration and differentiation capabilities, can find the sum of sequences, multiply matrices, and even solve complex number equations and cubic equations.

    On top of that, it has dual power, so even if the sun isn't shining it will not run out of battery. The calculator can also store your various answers in memory, making it very useful if you wish to perform multiple mathematical manipulations at once.

    Only criticism I could think of is I wish it came in black.
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    Verified Purchase
    everyone in my maths class is jealous that i can integrate on this lad
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    Verified Purchase
    Having used TI calculators in the past, I can safely say this is more user friendly, with most of if not all of the same functions. Great for GCSE maths (especially the new spec) and AS maths and further maths (due to the inclusion of matrices and complex numbers). Plus, these things tend to last for years on end without new batteries.
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    Verified Purchase
    Very helpful. Can save a lot of time in Maths as it does equations for you so you dont have to always solve quadratic equations etc. also helps with S1 modules in A Level maths.
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