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.

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MS-80B Standard Function Desktop Calculator,Black

Product ID: 278467230

Details

Brand
Casio
Calculator Type
Standard
Colour
Grey
Power source
Solar
Screen size
3.25

💱Tax & currency conversion

🔢Large 8-digit LCD display

☀️Dual solar & battery power

MOP$514

Duties & taxes included

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Sold byAmazon MacauDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🖥️ Crunch numbers like a pro—stay ahead with Casio MS-80B!

SLEEK PROFESSIONAL - Compact desktop design with a silver-metallic finish that fits perfectly in any modern office or home workspace.
POWER THAT NEVER QUITS - Solar plus battery backup keeps you calculating even in low light—no more dead batteries slowing you down.
SEE EVERY DIGIT CLEARLY - Extra-large 8-digit display with 3-digit comma markers for effortless number reading and error-free work.
SMART FINANCIAL FUNCTIONS - Built-in tax, currency conversion, and profit margin % keys to streamline your budgeting and business calculations.
EFFORTLESS COMMAND CONTROL - On/off buttons, key rollover, and independent memory ensure smooth, fast input without missed entries.

The Casio MS-80B is a reliable, dual-powered desktop calculator featuring an 8-digit LCD display, solar plus battery power, and advanced financial functions including tax and currency conversion. Its ergonomic design and user-friendly keys make it an essential tool for professionals managing everyday calculations with precision and style.

Specifications

ASIN	B003822IRA
Best Sellers Rank	#43,352 in Office Products ( See Top 100 in Office Products ) #143 in Basic Calculators
Brand	Casio
Built-In Media	MS-80B Mini Desktop Calculator (1)
Calculator Type	Standard Function
Color	Grey
Compatible Devices	Personal Computer
Customer Reviews	4.7 4.7 out of 5 stars (13,842)
Display Type	LCD
Enclosure Material	Plastic
Global Trade Identification Number	00079767187385
Item Dimensions L x W	14.7L x 10.3W centimeters
Item Highlight	General purpose calculator with large display; ideal for home, office & everyday math
Item Type Name	Solar Desktop Calculator with 8-Digit Display
Item Weight	120 Grams
Manufacturer	CASIO
Mfr Part Number	MS-80B
Model Name	RA3464
Model Number	MS-80B
Number of Batteries	1 Product Specific batteries required.
Number of Items	1
Power Source	Solar
Screen Size	3.25
UPC	079767187385
Unit Count	1 Count

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Our prices include the product cost, international shipping, import duties, customs clearance, and local delivery charges. We handle all customs and import procedures, ensuring there are no hidden fees upon delivery. PRO members receive additional benefits including free shipping.

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TrustScore 4.5 | 7,300+ reviews

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MOP$514

Duties & taxes included

In stock

Sold byAmazon MacauDelivered 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 Macau.

Secure transaction

Trustpilot

TrustScore 4.5 | 7,300+ reviews

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Fast shipping and excellent packaging. The Leatherman tool feels very premium and sturdy.

1 day ago

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Received my product in pristine condition. Great service overall.

1 month ago

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