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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Casio MS-80S Calculatrice

Product ID: 225310727

Details

Brand
Casio
Calculator Type
Standard
Colour
Brushed Nickel
Compatible devices
1
Material
Plastic
Model name
MS 80S

💼Compact desktop design

🔢8-digit large LCD display

☀️Solar + battery backup power

Description

🧮 Power your productivity with precision and style!

SLEEK DURABLE - Brushed nickel finish with a compact 14.7 x 10.3 cm footprint fits perfectly on any desk.
TRUSTED LOVED - 4.7-star rating from over 13,500 users proves it’s the go-to calculator for professionals.
DUAL POWER RELIABILITY - Solar plus battery backup ensures uninterrupted use even in low light.
EFFORTLESS READABILITY - Large 8-digit LCD display with 3-digit comma markers for quick, error-free calculations.
PROFESSIONAL GRADE FUNCTIONS - Includes tax, currency exchange, mark-up percent, and independent memory for versatile office tasks.

The Casio MS-80S is a solar-powered desktop calculator featuring an 8-digit LCD display, battery backup, and essential financial functions like tax and currency exchange. Its sleek brushed nickel design and compact size make it ideal for home or office use, backed by a strong 4.7-star user rating.

Specifications

ASIN	B003822IRA
Best Sellers Rank	323,188 in Stationery & Office Supplies ( See Top 100 in Stationery & Office Supplies ) 449 in Basic Calculators
Brand	Casio
Brand Name	Casio
Calculator Type	Standard Function
Colour	Brushed Nickel
Compatible Devices	1
Customer Reviews	4.7 out of 5 stars 13,621 Reviews
Display Type	LCD
Enclosure Material	Plastic
Global Trade Identification Number	00079767187385
Item Dimensions L x W	14.7L x 10.3W centimetres
Item Weight	120 Grams
Manufacturer	Petra Industries
Manufacturer Part Number	MS-80B
Model Name	MS 80S
Model Number	MS-80B
Number of Batteries	1 Product Specific batteries required.
Number of batteries	1 Product Specific batteries required.
Power Source	Battery Powered, Solar Powered
Power source	Battery Powered, Solar Powered
Screen Size	3.25
Screen size	3.25
UPC	079767187385
Unit Count	1.0 count

Reviews

H**B

CASIO Solar-Taschenrechner MS 80B

Der Taschenrechner gefällt mir sehr gut. Die Tastengröße, auch das Display und die Größe des Rechners sind einfach sehr gut! Die Lieferung erfolgte noch vor dem Zustellungsdatum der Bestellung und auch der Preis ist für den Taschenrechner prima!

13.11.2020

F**W

Excellent price for a great calculator

I lost track of how many times I have bought this particular calculator (and the last time I had to buy one, years ago). They work great, they last a long time. It is very convenient that you don't need batteries because it is solar-powered, which it's a plus. Size is good and the numbers are very bright. I totally recommend it.

17.05.2026

M**X

Great One

Casio MB-80B calculater is one of the best and Stylish calculater for basic usages, big and clear display, comfortable keys, Two way power and turn-off button, only one thing that keeps away from one star is “it doesn’t has a check option button to check multiple entries” 1)Compact design n size 2)Sharp display 3)Attractive keys 4)Currency conversation n General business usage 5)Made of good material 6)Original Casio brand name in back plate n in display on turnoff 7)Made in Philippines OVERALL FOUR STARS

18.09.2018

A**N

It is just a basic calculator

disappointed that the item is smaller than expected. the numbers on the calculator are big and the buttons are smooth. like the on/off function

16.05.2020

B**Y

Bonita y práctica

Muy práctica para operaciones sencillas gramaticales, porcentajes, etc. de celdas solares, antideslizante. Me gustó mucho.

21.03.2022

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