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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fx-115ES Plus 2nd Ed 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
Battery
Screen Size
6.5

⚡Battery-powered with long-lasting LR44 included

📐16-digit, 4-line Natural Textbook Display

🔢252+ functions for every calculation

₹ 4013

Duties & taxes included

In stock

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Description

📊 Elevate your problem-solving game with Casio’s ultimate scientific sidekick!

READY WHEN YOU ARE - Includes battery for instant use—no downtime, no hassle
COMPACT YET POWERFUL - Lightweight 6.05 oz design fits perfectly in your backpack or desk
TRUSTED BY THOUSANDS - 4.8-star rating from over 7,300 users proves reliability and precision
SEE YOUR WORK LIKE A PRO - Natural Textbook Display mimics textbook format for intuitive learning
MASTER COMPLEX CALCULATIONS EFFORTLESSLY - 252+ built-in functions covering math, science, engineering & stats

The Casio fx-115ES Plus 2nd Edition is a top-rated advanced scientific calculator featuring 252+ functions and a 16-digit, 4-line Natural Textbook Display. Designed for students and professionals in math, science, engineering, and statistics, it offers precise calculations in a lightweight, battery-powered design trusted by thousands worldwide.

Specifications

ASIN	B086Z79HXS
Best Sellers Rank	#1,962 in Office Products ( See Top 100 in Office Products ) #8 in Scientific Calculators
Brand	Casio
Calculator Type	Engineering/Scientific
Color	White
Customer Reviews	4.8 4.8 out of 5 stars (7,380)
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	Battery Powered
Screen Size	6.5 centimeters
UPC	889232609690
Unit Count	1 Count
Warranty Description	1 year limited parts & labor

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