When i use the percentage button, it calculates at a false rate. 100+10%=111.11111 that's what the calculator tells me. how do i fix this?

I also was confused when trying to subtract percentages using the % key. I have never had a calculator function like this and I have had several other Casio models. Can confirm (X x Y% +/-) will get you the correct total "10 x 10% -" will get you 9 as an answer just as "10 x 10% +" will get you 11. Annoying to have to take an extra step, whatever Casio I'm sure you have your reasons.

On this calculator 50-10%=400 and 50+10%=55.55. What am I doing wrong?

To add or subtract a % from a number, using the % key, you first have to multiply the number by the %, then press + or –. Examples: To calculate 50 plus 10%, enter 50 x 10% (answer 5), then press + (answer 55). To calculate 50 minus 10%, enter 50 x 10% (answer 5), then press – (answer 45).

does it have a back button

yES, IT DOES Yes, it does. The BACKSPACE (ERROR CORRECTION) KEY you're looking for is the ARROW directly to the left of the TAX- key. Each press erases the last entered digit so it can then be reentered correctly.

Is this completely flat or is it curved at the top?

The display window is curved at about a 25 degree angle for ea\asy reading.

MS-80B Calculator – Desktop Calculator with Tax & Currency Tools | General Purpose | Large Display | Ideal for Home, Office & Everyday Math

Product ID: 1147653

Details

Brand
Casio
Calculator Type
Standard
Color
Brush Nickel
Power Source
Solar Powered
Screen Size
3.25

💰Built-in tax & currency tools

🔆Solar-powered energy efficiency

🔢Large 8-digit display clarity

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Description

🔢 Power your productivity with precision and style!

ECO FRIENDLY POWER - Solar-powered design means no battery worries—always ready when you are, reducing your carbon footprint.
TRUSTED BY THOUSANDS - Join over 14,000 satisfied users who rate it 4.7 stars—your reliable partner for everyday math challenges.
CRYSTAL CLEAR DISPLAY - Large 8-digit LCD ensures every number is visible at a glance, minimizing errors and boosting productivity.
EFFORTLESS CALCULATIONS - Navigate complex tax and currency conversions with built-in tools designed for precision and speed.
PROFESSIONAL GRADE DURABILITY - Compact yet robust brush nickel finish fits seamlessly on any desk, built to withstand daily office hustle.

The Casio MS-80B is a solar-powered desktop calculator featuring an 8-digit large LCD display, built-in tax and currency calculation tools, and a durable brush nickel finish. Ideal for home and office use, it combines eco-friendly energy with professional-grade functionality, making it a top choice among basic office calculators.

Specifications

ASIN	B003822IRA
Best Sellers Rank	#670 in Office Products ( See Top 100 in Office Products ) #3 in Basic Office Calculators
Brand	Casio
Built-In Media	MS-80B Mini Desktop Calculator (1)
Calculator Type	Standard Function
Color	Brush Nickel
Compatible Devices	1
Customer Reviews	4.7 4.7 out of 5 stars (14,123)
Display Type	LCD
Enclosure Material	Plastic
Global Trade Identification Number	00079767187385
Item Dimensions L x W	5.79"L x 4.06"W
Item Type Name	Solar Desktop Calculator with 8-Digit Display
Item Weight	120 Grams
Manufacturer	Casio
Mfr Part Number	MS-80B
Model Name	Casio MS-80B Standard Function Desktop Calculator,Black 147D×103W×28.8H mm
Model Number	MS-80B
Number of Batteries	1 Product Specific batteries required.
Power Source	Solar Powered
Screen Size	3.25
UPC	079767187385
Unit Count	1.0 Count
Warranty Description	One year from date of purchase

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In stock

Sold byAmazon VietnamDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

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

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