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DUPOTA OA-991ES PLUS Scientific Calculator 417 Functions, Support Fraction and Decimal Point Conversion 10+2 Digits Written Display, Solar Battery - Ideal for Secondary School Students and Teachers

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  • 【417 Computing Functions】The scientific calculator with 417 functions for Include exponents, matrix calculations, statistics, integral, algebra, complex number calculations, standard deviation,etc.Apply to school, office or business, and more. Its practicability could meet the needs of various digital fields, and ideal for students.
  • 【Scientific Calculator is suitable for】Students from high school to college. For high school students, it is suitable for courses such as Algebra II, Pre-Calculus, Calculus, etc. For college students, it is widely used in math majors, especially in these courses such as Algebra, Calculus, Linear Algebra, Differential Equations, etc., to solve complex computational needs.
  • 【Two Line Written Display】The 2-line display shows the input and calculation results at the same time. The scientific calculator can convert between fractions and decimals, making it convenient to handle exact values ​​in calculations.
  • 【Answer Memory & Replay Function】Scientific Calculator can memorize the answers of previous calculations and replay them for viewing at any time, easily checking and modifying complex calculations, reducing the time spent on manual record keeping and repetitive inputs, helping you to complete your homework and exams more efficiently, and saving time in studying and taking exams.
  • 【Dual Power】The scientific calculator has dual power sources, solar and battery, for double security. Solar power ensures that it can still be used normally when the batteries run out. You don't have to worry about the calculator suddenly running out of power during critical exams or homework, and with greater peace of mind.

    • Review:

    4.8 out of 5

    96.00% of customers are satisfied

    5.0 out of 5 stars Bought it for my daughter A level studies and she likes it.

    H.A. · 26 September 2024

    This calculator is an essential tool for A-level students, offering a wide range of advanced functions which only my daughter knows. It has a clear, easy-to-read display and intuitive buttons, making complex calculations straightforward.While it’s packed with features, it may take a bit of time to fully understand all the functions. However, once you're familiar with it, it's reliable and accurate for both exams and study sessions. Happy with the purchase.

    5.0 out of 5 stars Comprehensive and Functional Scientific Calculator

    A. · 8 October 2024

    The DUPOTA OA-991EX PLUS Scientific Calculator is a versatile tool, offering 552 functions that cater to a broad range of mathematical needs. It's especially suitable for A-level students and professionals alike, with capabilities spanning fractions, exponents, matrix calculations, and statistics. The dual-line display is particularly helpful, allowing users to see both inputs and outputs simultaneously. Although it may take some time to fully grasp all its functions, once familiar, it proves to be a reliable and accurate companion for both study sessions and exams.One of the standout features of this calculator is its dual power source, utilising both solar and a button battery (LR44) for backup. This ensures that it remains operational even in less than ideal lighting conditions. However, some users have noted that the lightweight design, while making it highly portable, gives it a somewhat cheap feel. Additionally, the slide-on hard plastic case, although protective, can be a bit cumbersome to use, often requiring some force to remove.Despite a few minor drawbacks, such as the lack of a backlight and the default fraction mode, the DUPOTA OA-991EX PLUS remains a solid choice for those needing a comprehensive scientific calculator. Its ease of use, once mastered, and its vast array of functions offer good value for the price, making it a dependable tool for both students and professionals.

    4.0 out of 5 stars Takes me back to the good old days

    N.T. · 22 September 2024

    I haven't had a 'proper' new calculator for many many years. When I got my first job as a programmer, my parents bought me a solar powered scientific calculator, which I still have more than 40 years later. When I saw this, I just had to get it. Brings back a lot of memories and harks back to the good old days of computer programming when having a good quality calculator was an essential tool.This is a very nice calculator. It comes with a hard plastic half-case, into which is slides for protection, and can then be slid in backwards for use. Personally, I'd have preferred a fold-over flap-type soft case, as the unit has a tendency to get 'stuck' in the hard shell, requiring some force to push it out. The calculator itself is extremely lightweight, so much so that it actually makes it feel a bit cheap. If the manufacturer had added some weight it would have gone a long way to making it feel higher quality. The only issue I really have is that I wish it had a backlight. Perhaps this would require a larger battery, but again that would increase the weight and make it feel a bit more solid, so could be an improvement. I found the display quite difficult to read in low light conditions, even when adjusting the screen contrast.Overall, it's a full function calculator that provides for pretty much every basic mathematical option one might need, but it feels very light and definitely needs a backlight.

    5.0 out of 5 stars Good for High School

    M.T.A. · 28 September 2024

    I recently purchased the **DUPOTA OA-991EX PLUS Scientific Calculator**, and I must say, it has truly impressed me with its functionality and design. With an extensive range of **552 functions**, this calculator is perfect for students and teachers alike, making it an excellent choice for anyone in middle or high school looking to simplify complex mathematical problems.One of the standout features of this calculator is its **2-line written display**. This dual display allows users to see both the formula and the result simultaneously, which significantly enhances comprehension and reduces errors. I’ve found this particularly helpful when tackling multi-step calculations, as I can easily track my work without losing my place. The clarity of the display is excellent, ensuring that I can read numbers and functions without any strain, even in varying lighting conditions.The **fraction and decimal point conversion** feature is another game-changer. It makes it incredibly easy to switch between fractions and decimals, which is vital for understanding and comparing numerical values in different formats. This function has made my homework and exam preparation much smoother, as I can quickly convert values without manual calculations. The ease of use makes it accessible, even for students who may be intimidated by advanced calculators.The **solar battery** power source is a thoughtful addition that enhances the calculator's usability. It means that I never have to worry about running out of batteries during critical study sessions or exams. The combination of solar and battery power ensures reliability in all lighting conditions. Plus, the sleek black design gives it a professional look, which I appreciate.Overall, the DUPOTA OA-991EX PLUS Scientific Calculator has been a fantastic investment. Its robust functionality, user-friendly interface, and reliability make it an ideal tool for anyone studying mathematics or related subjects. I highly recommend this calculator to students and teachers looking for a reliable, feature-rich device that can handle a wide range of mathematical tasks with ease. It’s truly a great companion for anyone aiming to excel in their studies!

    5.0 out of 5 stars Great for school!

    S. · 12 October 2024

    This product was provided by Bolo vine.My niece started secondary school this year and on the list of equipment was a scientific calculator. This was great! With a wide range of functions this certainly will help with her maths and homework. It’s a great quality calculator with a good display. Easy to use and has a back casing that you can slide off and place on the front to protect the calculator. Although on the pricey side for a calculator she finds it easy to use and is practical.

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    DUPOTA OA-991ES PLUS Scientific Calculator 417 Functions, Support Fraction and Decimal Point Conversion 10+2 Digits Written Display, Solar Battery - Ideal for Secondary School Students and Teachers

    4.6

    BHD15151

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    Product origin: United Kingdom

    All product information listed on the site are from 3rd party sources, including images and reviews. bolo.bh is not liable for any claims or promotions mentioned on the product description or images with textual content. For detailed product information, please contact the manufacturer or Bolo support by logging into your account. Unless stated otherwise during checkout, all import taxes and duty are included in the price mentioned on the product page. bolo.bh follows the rules and regulations of sale in Bahrain and will cancel items in an order that are illegal for sale in Bahrain. We take all the necessary steps to ensure only products for sale in Bahrain are displayed. Product stock and delivery estimate may change with the seller even after placing the order. All items are shipped by air and items marked “Dangerous Goods (DG)” by the IATA will be cancelled from orders. We strive to process your order as soon as it is finalized.

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