Can it handle complex numbers in matrix ?

Yes. .or say within reason. Download the manual from Casio, its free and you dont need to buy calculator.. Look at page 114 and 107. Make sure you download fx-991CW...not fx-991.

¿Este artículo tiene garantía?

Good afternoon, I bought the calculators without a guarantee, but I really don't know if the product has a guarantee, although they should have a guarantee. Regards, AC.

when you turn off the calculator, the calculation history is deleted or not?

The data is deleted when you turn it off. It's the only thing that keeps it from being the perfect scientific calculator for me.

is there a ohms law calculator?

Well any calculator can "do" Ohms law. If ypur worried about remembering it, any programming calculator can store formulas for you...Calculated Industries (yellow calculators) makes 2 Electrical calculators, pretty sure both have Ohms law function key.

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fx-991CW Advanced Scientific Calculator, 4-Tone Display

Product ID: 639197219

Details

Brand
Casio
Calculator Type
Color
Black
Power Source
Solar Powered
Screen Size
2.25 inches

📊540+ advanced functions

🔋solar powered with battery backup

🖥️4-tone high-res display

180.19 DT

Duties & taxes included

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Sold byAmazon TunisiaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

📐 Elevate your calculations—where precision meets power.

QR CODE GRAPHING - Instantly visualize results by scanning QR codes to ClassPad.net—next-level study sessions.
MEMORY MATH CATALOG - Store up to 9 variables and access 87 constants & conversions for seamless workflow.
540 ADVANCED FUNCTIONS - From numeric integration to 4x4 matrix operations, tackle complex problems effortlessly.
NATURAL TEXTBOOK DISPLAY - See equations exactly as in your textbooks—no more guesswork or errors.
DURABLE ERGONOMIC DESIGN - Rounded keys and non-slip case built for intense exam conditions and daily use.

The Casio fx-991CW is a solar-powered advanced scientific calculator featuring a crisp 4-tone high-resolution display and over 540 functions including numeric calculus, matrix operations, and vector calculations. Designed for students and professionals, it offers a natural textbook display, memory storage for variables, and QR code functionality for graphing on ClassPad.net, all housed in a durable, ergonomic design ideal for exams and daily use.

Specifications

ASIN	B0BSJ33C4R
Best Sellers Rank	#86,334 in Office Products ( See Top 100 in Office Products ) #90 in Scientific Calculators
Brand	Casio
Calculator Type	Engineering/Scientific
Color	Black
Customer Reviews	4.7 4.7 out of 5 stars (2,213)
Display Type	LCD
Enclosure Material	Plastic
Item Dimensions L x W	6.3"L x 3"W
Item Highlight	540+ functions, numeric calculus, matrix solver; ideal for engineering, science & exams
Item Type Name	Casio Advanced Scientific Calculator
Item Weight	3.35 ounces
Manufacturer	Casio
Mfr Part Number	FX-991EX
Model Name	FX-991CW
Model Number	FX-991CW
Number of Batteries	1 LR44 batteries required. (included)
Number of Items	1
Power Source	Solar Powered
Screen Size	2.25 inches
UPC	889232615011
Unit Count	1 Count
Warranty Description	1 year limited manufacturer

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