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-115ESPLS2 White Advanced Scientific Calculator with Natural Display

Casio fx-115ESPLS2 White Advanced Scientific Calculator with Natural Display

Product ID: 725163829

Details

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

🔋Solar plus battery backup

🔢16-digit 4-line LCD display

⚙️280+ advanced math & science functions

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€ 58.14

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Sold byAmazon ItalyDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

📐 Master every calculation like a pro—because precision is your power move.

MULTI REPLAY FUNCTION - Effortlessly backtrack, edit, and recalculate steps—no more lost work.
RELIABLE POWER SYSTEM - Solar energy supplemented by battery backup ensures uninterrupted performance during crunch time.
NATURAL TEXTBOOK DISPLAY - See equations exactly as in your textbooks for flawless comprehension.
DURABLE PORTABLE DESIGN - Sleek white finish with sliding hard case keeps your calculator protected and stylish on the go.
COMPREHENSIVE SCIENTIFIC TOOLKIT - 280+ functions including matrix, vector, statistics & metric conversions to power through any problem.

The Casio fx-115ESPLS2 is a high-performance scientific calculator featuring a 16-digit 4-line natural textbook display, over 280 advanced functions including matrix and vector calculations, and a robust solar plus battery power system. Designed for students and professionals tackling complex math, engineering, and science problems, it combines durability with intuitive usability in a sleek white design with a protective sliding case.

Specifications

ASIN	B086Z79HXS
Amazon Bestseller	#45,070 in Office Products ( See Top 100 in Office Products ) #28 in Scientific Calculators
Brand	Casio
Calculator Type	Engineering/Scientific
Color	White
Customer Reviews	4.8 4.8 out of 5 stars (7,091)
Display Type	LCD
Enclosure Material	Plastic
Global Trade Identification Number	00889232609690
Item Dimensions L x W	22.9L x 14W cm
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

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