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The OSALO Scientific Calculator OS-991ES PLUS 2 offers 417 functions including fractions, matrices, and statistics, with a 2-line written display for easy reading. Powered by both solar and battery sources, it features adjustable brightness and a lightweight, portable design with a protective case—ideal for students and professionals aiming for flawless, efficient calculations.
| Asin | B0CJLC75XS |
| Best Sellers Rank | 1,415 in Stationery & Office Supplies (See Top 100 in Stationery & Office Supplies) 7 in Scientific Calculators |
| Brand Name | OSALO |
| Calculator Type | Engineering/Scientific |
| Colour | black |
| Country Of Origin | China |
| Customer Reviews | 4.4 4.4 out of 5 stars (753) 4.4 out of 5 stars |
| Display Type | LCD |
| Enclosure Material | Plastic |
| Item Dimensions L X W | 16.4L x 1.7W centimetres |
| Item Highlight | Math Scientific Calculator, 2-Line Written Display, Solar & Battery Power for GCSE, Secondary High School College |
| Item Weight | 0.15 Kilograms |
| Manufacturer | OSALO |
| Manufacturer Part Number | OSALO CO.,LTD. |
| Model Name | OS 991ES Plus 2nd Edition |
| Model Number | OS-991ES PLUS II |
| Number Of Batteries | 1 LR44 batteries required. (included) |
| Number Of Items | 1 |
| Power Source | Battery & Solar |
| Screen Size | 6 |
| Upc | 730637240479 |
User
Good Calculator
A simple and easy to use product which does the job for my daughter who has just started secondary school. I would recommend this for anyone else.
User
Quality & Useful
Very Good
User
Does exactly what you want it to do
Sturdy calculator. Doesnt feel cheap or anything which is great. Its very easy to use. Didnt take little getting used to but the instruction of the buttons on the inside of the case do massively help.Took this into my Level 2 Electrical exam and passed being able to comfortable answer all questions that had equations. Highly recommend
User
Practical
Great use for a level and higher level of maths
User
Equally as good as the other well known calculators.
Lors of functions.
User
This is Sciene
Liked its appearance, complexity, the quality, its value for money and functionality
User
It's not what it looks like. Not suitable for A-Level.
At first glance, you might expect this calculator to be a clone of the discontinued Casio fx-991EX. It has the same white casing, the same black, blue and white buttons, and a broadly similar key layout.However, you will see from the photograph that the Osalo has a text interface rather like the old fx-991ES model from 2010, whereas the fx-991EX has a modern icon-based menu.This calculator is a capable enough machine for GCSE or iGCSE Mathematics, but lacks a couple of features now essential for A-Level exams. Foremost among these omissions is a Distribution Function, so there is no way to calculate Normal probabilities without using tables, and for Binomial or Poisson probabilities you have to rely on longhand methods. As for Inverse ("lookup") probabilities, you've got nothing.There is no Spreadsheet function, no Ratio tool, and no Inequality solver, although these would be considered useful rather than essential in an A-Level exam.Some of the other functions have limitations. The Simultaneous Equation solver can solve up to 3 unknowns (Casio 4 Unknowns). The Polynomial Solver can manage up to Degree 3 (Casio Degree 4). Matrix Mode can handle up to 3 Matrices (Casio 4), and each of these is limited to 3x3 (Casio 4 x 4).A brief test of its functions shows that it otherwise works fine and with quick results. The stored constants are all only accurate to about 5 s.f. so use the more official figures if you are calculating with these, or else be sure to round your answers.Overall, fine for GCSE Higher Tier, but go for the new 991CW or CG50 if you need something more suited to Maths A-Level or GCSE Statistics.
User
Scientific calculator
My daughter used this for her maths exam she said it was perfect.
User
Perfecta
Es estupenda. Muy buena compra
User
Sehr zu empfehlen
Der beste Taschenrechner den es für diesen Preis gibt.Meine Kinder sind begeistert.Er kann alles!!Sehr zu empfehlen
User
GREAT
AMAZING, Works too fine
User
Ottima
Facilissimo utilizzo, comoda
User
idéale pour l'épidémiologie
Cette calculatrice ultra légère, avec énergie solaire est parfaite pour l'épidémiologie, mode stat et calcul complexe, l'outil idéale a emporter partout
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