Reviews Casio FX 991 CE X
Interested in reviews of Casio FX 991 CE X? It got 4.9 out of 5 stars from our customers. Find specific customer reviews of Casio FX 991 CE X below. We will appreciate if you also share your experiences with Casio FX 991 CE X after purchasing.
User Reviews
Karol, Šúrovce
Rated 23/05/2025, variant Casio FX 991 CE X
Verified purchase
komplexné čísla (dobré na výšku pre inžinierov)
komplikované zadávanie údajov(je treba si na zopár hodín sadnúť a vyskúšať na nej všetko, lebo väčšina možností nieje intuitívna)
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Jana, Čachtice
Rated 08/12/2021, variant Casio FX 991 CE X
Verified purchase
many features
Small display, digits are very small in more complex calculations.
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Jozef, Bratislava
Rated 21/09/2021, variant Casio FX 991 CE X
Verified purchase
Quality, features, QR code generator, graphs, tables, etc.
Excellent price-performance-quality-appearance ratio
Ideal for high school students
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Róbert, Malacky
Rated 24/05/2020, variant Casio FX 991 CE X
Verified purchase
Functions, solar powered.
Mensie numerals and letters.
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Ivan, Žiar nad Hronom
Rated 27/02/2018, variant Casio FX 991 CE X
Verified purchase
Super calculator and price. Casio is my favorite brand in this segment
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ProtoWay s. r. o., Bratislava
Rated 01/11/2017, variant Casio FX 991 CE X
Verified purchase
Quality workmanship. Lots of features.
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Jiří, Doudleby nad Orlicí
Rated 18/10/2026, variant Casio FX 991 CE X
Verified purchase
everything OK
nothing so far
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Matyáš, Třemošná
Rated 10/10/2026, variant Casio FX 991 CE X
Verified purchase - review from a price comparison website
Excellent delivery, the calculator has all the functions I need and many more, great.
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Lukáš, České Budějovice 11
Rated 10/07/2026, variant Casio FX 991 CE X
Verified purchase
purchased in 2023 and still going strong; it’s been a great help both at secondary school and at university
lots of features
The display is not entirely easy to see in certain lighting conditions
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Reply from Alza
16/07/2026
Hello, thank you for your suggestion, on the basis of which the supplier contacted us and would like to respond below.
"Hello, you can adjust the display contrast to suit the lighting conditions in the calculator menu:
Press SHIFT
Press MENU (SETUP)
Select Contrast from the menu
Use the ← and → arrow keys to adjust the contrast. "
Please do not hesitate to contact us in case of need. Thank you and have a nice day, Ondřej - Alza expert
Barbora, Praha 10 Vršovice
Rated 24/03/2026, variant Casio FX 991 CE X
Verified purchase
Supplied with a dead battery.
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