Casio FX-991EX Engineering/Scientific Calculator, Black, 3
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Casio FX-991EX Engineering/Scientific Calculator, Black, 3
High-resolution LCD shows more of your work to minimize scrolling
Casio FX-991EX Engineering/Scientific Calculator, Black, 3" x 6.5" x 0.4"

Casio FX-991EX Engineering/Scientific Calculator, Black, 3" x 6.5" x 0.4"

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High-resolution LCD shows more of your work to minimize scrolling
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O que se Destaca

High Precision
Provides advanced calculations with a 552-button design, ensuring accurate results for engineering and scientific tasks, making it ideal for professionals and students alike.
Visual Graphing
Equipped with a captivating natural display, it effortlessly shows fractions, roots, and graphs, enhancing comprehension for complex mathematical concepts.
Versatile Functions
Offers over 500 functions including statistics, calculus, and matrix computations, addressing diverse user needs effectively compared to standard calculators.

Detalhes do produto

Find the best deals on Casio FX-991EX Engineering Scientific Calculator at Ubuy São Tomé and Príncipe. Perfect for math, calculus, algebra, geometry, statistics, and more. Shop now!
Package Weight1.16 Pound

Quem Deverá Comprar?

Suitable For
  • Students

    Ideal for high school and college students needing advanced calculation capabilities for math and science courses.

  • Engineers

    Perfect for engineers requiring precise calculations and various scientific functions in their daily tasks.

  • Professionals

    Useful for professionals in fields such as finance or data analysis needing complex calculations without a computer.

Not Suitable For
  • Casual Users

    Not suitable for casual users who only require basic arithmetic without advanced functions or scientific capabilities.

DESCRIÇÃO DO PRODUTO

Casio FX-991EX Engineering/Scientific Calculator, Black, 3" x 6.5" x 0.4"

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Perguntas e Respostas dos Clientes

  • pergunta: What features does the Casio FX-991EX Engineering Scientific Calculator have?

    Resposta: The Casio FX-991EX is equipped with a wide range of features, including a 2-line display for easier viewing of inputs and results, 552 functions for comprehensive calculations, and advanced capabilities such as fraction calculations, complex number calculations, and differential and integral calculus. This makes it an excellent tool for students, engineers, and professionals who require reliable and advanced computational power for their work.
  • pergunta: Is the Casio FX-991EX suitable for high school and university students?

    Resposta: Yes, the Casio FX-991EX is highly suitable for both high school and university students. Its extensive functions cover various subjects such as algebra, geometry, calculus, and statistics, making it an ideal tool for coursework and exams. The calculator is designed in compliance with exam regulations, ensuring that students can use it in most academic settings without any issues.
  • pergunta: Does the Casio FX-991EX have a solar power feature?

    Resposta: Indeed, the Casio FX-991EX features a solar power option along with a backup battery. This means that in well-lit environments, the solar panel will assist in conserving battery life, while the battery ensures that the calculator remains functional even in low-light conditions. This dual-power system enhances the longevity of the device, making it reliable for extended periods of use.
  • pergunta: Can I perform graphical calculations on the Casio FX-991EX?

    Resposta: While the Casio FX-991EX does not support full graphical display, it does allow for some graphical calculations such as plotting points, finding roots, and more. It provides solutions in a very user-friendly format, making it useful for analyzing functions in subjects such as mathematics and engineering. Users can benefit from advanced calculations without needing a full graphics calculator.
  • pergunta: How durable is the Casio FX-991EX calculator?

    Resposta: The Casio FX-991EX is designed to be durable and withstand daily usage. Its sturdy construction and protective cover ensure that it can handle being carried in bags without significant wear and tear. This resilience makes it an ideal choice for students and professionals who use their calculator frequently in varying environments.
  • pergunta: What is the display size and quality of the Casio FX-991EX?

    Resposta: The display of the Casio FX-991EX measures approximately 3 x 6.5 inches, featuring a sharp LCD screen that allows for clear visibility of calculations and results. The two-line display enables users to see equations and results simultaneously, improving workflow and aiding in understanding complex calculations. This quality display enhances user interaction, especially when performing long or multi-step calculations.
  • pergunta: Are batteries included with the Casio FX-991EX?

    Resposta: Yes, the Casio FX-991EX comes with pre-installed batteries, allowing you to start using it right out of the box. Whether you're a student or professional, this feature saves time and ensures that you can begin calculations without delay. The backup battery not only supports the solar function but also provides convenience for users who are on the go.
  • pergunta: Is the Casio FX-991EX compliant with exam regulations?

    Resposta: Yes, the Casio FX-991EX is compliant with most exam regulations, particularly for high school and university-level assessments. Its functions are tailored to meet the requirements set by examination boards, making it a suitable choice to bring to exams without any concerns about restrictions. This ensures students are well-equipped to handle their coursework legitimately.
  • pergunta: Can I download manuals or user guides for the Casio FX-991EX?

    Resposta: Yes, you can download user manuals and guides for the Casio FX-991EX from the Casio website or authorized sellers. These resources are helpful for new users to understand the calculator's extensive functions and utilize them effectively. They provide detailed explanations, tips, and tricks to optimize the calculator for both academic and professional applications.
  • pergunta: Where can I buy the Casio FX-991EX Engineering Scientific Calculator in São Tomé and Príncipe?

    Resposta: You can buy the Casio FX-991EX Engineering Scientific Calculator from Ubuy. Ubuy is a reliable online platform that offers a vast selection of electronics and academic tools, ensuring that you receive your calculator swiftly and securely. They provide excellent customer service and product availability, making Ubuy a convenient option for purchasing this calculator.

Casio Scientific Editorial Review

The Casio FX-991EX Engineering Scientific Calculator is a reliable and functional calculator suitable for university students who don't need a graphing calculator. It has many features including unit conversions and the ability to handle 4x4 matrix calculations. It can also be used in conjunction with a smartphone for graphing. However, some reviewers found the process for using the memory functions to be tedious, and the font size on the high-resolution screen to be too small for normal math calculations. Additionally, the screen has a dark filter that some users found difficult to read. It is noted to look cool and reliable. It can also be fast in its calculations.

Avaliações e Classificações dos Clientes

5.0
1 classificações de clientes
  • 5 Estrela
    100%
  • 4 Estrela
    0%
  • 3 Estrela
    0%
  • 2 Estrela
    0%
  • 1 Estrela
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Prós

  • Many functions available, including unit conversions and 4x4 matrix calculations
  • Reliable and functional for university students
  • Can be used in conjunction with a smartphone for graphing
  • Fast calculations
  • Dedicated Base-N buttons for converting values
  • Best quality, performance, and option-packed calculator in its price range

Contras

  • Font size too small for normal math calculations

Platform Trust & Buyer Confidence

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MT
Mohd
Verified buyer

“The product received very good packaging & safe…Thank You”

16 June 2026 · via Trustpilot
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Shawati
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“Accurate delivery timing given”

16 June 2026 · via Trustpilot
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Youcef
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“Not madly expensive like I thought, and much quicker than promised.”

15 June 2026 · via Trustpilot
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Leila
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“Never dealt with Ubuy before, but everything worked out great. Seamless cross border purchasing and shipping. Thanks!”

6/7/2026 · via Trustpilot
KA
Kwame
Verified buyer

“The process was smooth, with clear communication and timelines. This was my 1st purchase and I am really impressed. I will definitely be coming back.”

12 June 2026 · via Trustpilot
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Recursos e benefícios

  • High-resolution LCD display
  • Minimizes scrolling for better user experience
  • Advanced calculations to work through multi-step problems
  • Online Visualization for fast data representation
  • 2-way power for reliable use in any setting
  • Suitable for Calculus, Algebra, Geometry and more

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