Why does the calculator not display decimal answers and only fractions, and why won't it square numbers that aren't perfect squares

Hello, the sd key will change fractions to decimals and back if needed. The calculator will simplify square roots that are not perfect squares and if you need a decimal answer then press the sd key and if will convert it to a decimal.

Is there a comma separator - thousands function for millions and billions,etc. for example 50,000,000,000?

This is not a business calculator - not sure why you'd want a comma separator when you'd be using scientific notation: 5x10^10 for example.

How is this different than the fx-300ESPLUS2 ?

I am not familiar with the fx-300ESPLU52. You might be able to go to the Casio website to get information on how they are different. This one (the fx-115) has many features which I have not yet used.

can it used in SAT exam?

I'm a retired hs teacher. I've bought this model two times for my own kids because it met their needs and can be used during standardized exams such as the SAT.

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Casio fx-115ES Plus 2nd Edition – Advanced Scientific Calculator | 280+ Functions, Natural Textbook Display℠ | Ideal for Math, Science, Engineering & Statistics

Product ID: 638060645

Details

Brand
Casio
Calculator Type
Color
White
Power Source
Solar Powered
Screen Size
6.5

🔢16-digit 4-line LCD display

☀️Solar plus battery backup power

⚙️280+ advanced math & science functions

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Description

📐 Elevate your calculations—because precision is the new power move.

280 FUNCTIONS - From complex numbers to matrix ops—master every math challenge.
SOLAR PLUS BATTERY - Uninterrupted power with eco-friendly solar and reliable battery backup.
MULTI REPLAY FUNCTION - Instantly backtrack and edit calculations for flawless accuracy.
IDEAL FOR STEM SUCCESS - Trusted by top students and pros in math, science, and engineering.
NATURAL TEXTBOOK DISPLAY℠ - See equations exactly as in your textbooks—no more guesswork.

The Casio fx-115ES Plus 2nd Edition is a top-rated advanced scientific calculator featuring a 16-digit 4-line Natural Textbook Display℠ and over 280 functions including complex calculations, regression, and matrix operations. Powered by Solar Plus technology with battery backup, it ensures reliable performance for high school, college, and professional STEM users.

Specifications

ASIN	B086Z79HXS
Best Sellers Rank	#3,623 in Office Products ( See Top 100 in Office Products ) #5 in Scientific Calculators
Brand	Casio
Calculator Type	Engineering/Scientific
Color	White
Customer Reviews	4.8 4.8 out of 5 stars (7,331)
Display Type	LCD
Enclosure Material	Plastic
Global Trade Identification Number	00889232609690
Item Dimensions L x W	9"L x 5.5"W
Item Type Name	Advanced Scientific Calculator
Item Weight	6.05 Ounces
Manufacturer	Casio
Mfr Part Number	FX-115ESPLS2
Model Name	FX-115ESPLS2
Model Number	FX-115ESPLS2
Number of Batteries	1 LR44 batteries required. (included)
Power Source	Solar Powered
Screen Size	6.5 Centimeters
UPC	889232609690
Unit Count	1.0 Count
Warranty Description	1 year limited parts & labor

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Desertcart purchases this item on your behalf and handles shipping, customs, and support to Senegal.

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