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Casio FX-991ES Plus Scientific Calculator

Whitmars Treasures
  • (1920)
US $32.95
Condition:
New – Open box
“Customer return - opened box to verify contents and photo, tested, works great. Includes cover ”... Read moreabout condition

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Free Economy Shipping. See detailsfor shipping
Located in: Suffield, Connecticut, United States
Delivery:
Estimated between Fri, May 31 and Mon, Jun 3 to 43230
Delivery time is estimated using our proprietary method which is based on the buyer's proximity to the item location, the shipping service selected, the seller's shipping history, and other factors. Delivery times may vary, especially during peak periods.
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eBay item number:186091577203

Item specifics

Condition
New – Open box
An item in excellent, new condition with no functional defects. The item may be missing original packaging and may have been used for testing or demo purposes. The item includes accessories found with the original product and may include a warranty. See the seller's listing for full details and description. See all condition definitionsopens in a new window or tab
Seller Notes
“Customer return - opened box to verify contents and photo, tested, works great. Includes cover ...
Brand
Casio
Key Size
Regular
Type
Scientific
Power Source
Battery/Solar
Size
Handheld
Model
FX-991ES Plus
MPN
FX991MS/ES

About this product

Product Information

Easily compute the most complex of mathematical problems, equations, and scientific formulae with the Casio FX-991ES Plus scientific calculator. The Casio 991ES calculator works with a dual power source, the primary being a built-in solar power cell that keeps it running for hours without any batteries. Moreover, with batteries installed, you can safely use it for weeks together without worrying of replacing them. You can practice all sorts of mathematical problems that appear at the GCSE, A Levels and above, with this Casio FX-991ES Plus scientific calculator. The Casio 991ES calculator resolves complex calculations, integrations, and logarithms in just a few steps.

Product Identifiers

Brand
Casio
MPN
FX991MS/ES
UPC
4971850182276
Model
FX-991ES Plus
eBay Product ID (ePID)
92844524

Product Key Features

Power Source
Battery/Solar
Size
Handheld
Key Size
Regular
Type
Scientific

Additional Product Features

Display Type
Large

Item description from the seller

Whitmars Treasures

Whitmars Treasures

99.8% positive feedback
4.0K items sold
Visit storeContact
Joined May 1999

Detailed seller ratings

Average for the last 12 months

Accurate description
4.9
Reasonable shipping cost
5.0
Shipping speed
5.0
Communication
5.0

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Seller feedback (1,270)

a***m (1284)- Feedback left by buyer.
Past 6 months
Verified purchase
Everything positive with this seller: Item as advertised, great packing, rapid delivery, excellent communication. I would love to do business with you again. Thank you!
e***e (12)- Feedback left by buyer.
Past 6 months
Verified purchase
I had to place an order for this bible 3 times because my shipping info was old. Seller patiently cancelled both incorrect orders at my request until I got it right. Excellent customer service AND the bible is exactly as described. Highly recommend.
g***e (106)- Feedback left by buyer.
Past 6 months
Verified purchase
Though not in original box, was in excellent condition, was as described, and was exactly what we were looking for. Good price. Would buy from this seller again
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Product ratings and reviews

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4.8
207 product ratings
  • 186 users rated this 5 out of 5 stars
  • 13 users rated this 4 out of 5 stars
  • 1 users rated this 3 out of 5 stars
  • 0 users rated this 2 out of 5 stars
  • 7 users rated this 1 out of 5 stars

Would recommend

Good value

Good quality

Most relevant reviews

See all 120 reviews
  • by hendersonnh
    May 18, 2020Top favorable review

    Equation Solver

    I bought the Casio FX-991 ES. Fantastic for using Newton's law of approximation to solve equations like sinδ = a + bcos(δ + β) (a, b, β constants). Just substitute the ANS key for δ in the equation and keep hitting the "=" button till the answer doesn't change (converges).

    Verified purchase: YesCondition: NewSold by: discountwatch-llc

  • by twilliams9279
    Mar 14, 2011

    Easy to Use

    I bought this calculator because it was the best allowed for use on my exams (best in terms of its features and capablities). The "pretty print" font feature is great too. It can even perform integration and differentiation of a function at a specific value of the independent variable (or over a specified nonvariable range. Unfortunately, it can't produce the function that is the derivative, etc. of a given function like the TI89 (but then if it could it probably wouldn't be allowed on your exam anyhow). Anyway, this thing is pretty decent for calculus and physics - for stats, use a TI83 instead if you can. It is more than adaquate for business types and decent for science students too assuming your professor is against more advanced models. Engineers already know they'll be needing ...

  • by aguyonthebuy
    Sep 04, 2018

    Best Simple Display Calculator I've Used

    Best non graphing calculator for engineering courses I've used. Best part is being able to plug in human readable fractions.

    Verified purchase: YesCondition: NewSold by: ahmed1164

  • by sousabaye
    Jan 28, 2017

    Precise with great features

    I'm a student and this calculator helps me a lot to accomplish the math exercises required by class. Many functions are included, more than I will need actually but I loved the design, the big screen, the price and the ease of use.

    Verified purchase: YesCondition: NewSold by: ahmed1164

  • by helius619
    Sep 29, 2020

    Great for Digital Systems Design

    I recommend this model for CS studies and Electrical Engineering. It's real easy to calculate in non decimal base: base 2 8 and 16 and to convert it back to decimal. I think there are calculator models with a more robust screen. I guess that's why it's relatively cheap

    Verified purchase: YesCondition: NewSold by: easystreet_hangout

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