2nd Button on Casio Calculator

2nd Button on Casio Calculator

2nd Button on Casio Calculator

Under the 2nd button on the Casio fx-82MS Calculator you will find key selectors and functions keys which allow you to do your calculations in a single click.



I have a Casio fx-20 scientific calculator dating from the mid 70s. Been well looked after. Today it stopped working (used it earlier in the day). The display is lit (a 0 lights up) — but the keys cannot be activated. None of them works. I checked the batteries and changing them made no difference. Is there a way to open it up and maybe clean something inside? I love it and want to continue using it. Thank you. Read more Casio fx-115ES PLUS Engineering/Scientific Calculator Casio's latest and most advanced scientific calculator features new Natural Textbook Display and improved math functionality. FX-115ES PLUS has been designed to be the perfect choice for high school and college students learning General Math, Trigonometry, Statistics, Algebra I and II, Calculus, Engineering, Physics. Read more .

Before you use your Casio fx-82MS, select the correct mode. To perform basic arithmetic calculations, press “Mode” and 1 to select COMP. To perform standard deviation, press “Mode” and 2 to select SD. To perform regression calculations, press “Mode” and 3 to select REG. The current calculation mode appears in the upper part of the display. (Source: sciencing.com)



To operate a scientific calculator, locate the primary functions, like square root, sine, and tangent, since you'll be using these frequently. Additionally, familiarize yourself with the secondary functions above the primary keys, which can be accessed by pressing the “Shift” or “2ND” key. When dealing with longer problems, use the answer function to recall the last displayed answer to an equation. If you need to clear the screen, press the “Clear” button near the top of the keyboard. To learn how to switch between degrees and radians on a scientific calculator, keep read

To perform a fraction calculation, use the “a b/c” button. For example, to work out (3/4) + (1/6) input 3, press “a b/c”, input 4, press +, input 1, press “a b/c”, input 6 and press the equals button. The answer (11/12) appears on the display. You can convert calculation results between fraction values and decimal values. For example, to convert 1/4 on the display to a decimal, press the “a b/c” button to see 0.25. (Source: sciencing


The History of Casio Calculators

history of casio calculators

The history of Casio calculators goes back to the early 1900s, when the family business focused primarily on electrical goods. After Casio's calculators became popular, the company turned its attention to the fledgling computer market. It quickly became synonymous with electrical computers. The company also started making wrist-calculators, which didn't catch on at first, but other products became popular. During the 1970s, Casio expanded into the production of electronic instruments. The brand's popularity spread to the point that it became a household name and the company refined the watch.

Graphing calculators

The first graphing calculators by Casio were introduced in 1985, and they were primarily black in color with a metal keyboard. The calculators were equipped with four arithmetic function keys, an erase key, and an all-clear key. In addition to arithmetic functions, Casio's calculators featured keys to perform many other mathematical operations, including roots, square roots, sines, and tangents. These keys also carried out alpha mode, allowing the user to perform various functions by selecting different combinations of a key.

In 2004, Texas Instruments introduced the TI-84, using the same Z80 processor as Casio's fx-7000G. The Z80 processor had been manufactured by Zilog since 1976, and users increasingly wanted to make use of the calculator's processing power. However, despite the power of the Z80 processor, small screens limited users' ability to write programs and transfer them to other Casio calculators.

The Casio fx-7000G was the first graphing calculator. It had 422 bytes of memory and ten program slots, and 82 scientific functions. This device's display could switch between 8 lines of 16 characters, or a 64x96 dot matrix graphical display. This calculator resembled Sharp's stylus-based graphing calculators, but it did not achieve the same success.

LED technology

Many new Casio calculators feature LED technology. This feature enables the calculator to show calculations in a variety of colors, allowing the user to view the results more clearly. This new technology has a variety of benefits, including a reduced power consumption. For example, a calculator with an LED display can be recharged more quickly than a traditional calculator, and it can run off of a button battery.

In order to make these devices more affordable, the manufacturer switched from liquid-crystal displays to liquid-emitting diode (LED) displays. These newer models feature the smallest possible footprint and are easier to carry around. This new technology also produces a higher quality image. In addition, LEDs are less likely to burn out. The difference between LCDs and LEDs is the amount of power required by the LED display.

When LED technology was first introduced, many people were surprised by the bright, vibrant display. Early calculators lacked LCD technology and were only available with a yellow filter to prevent UV rays. Since LCDs require less power than light-emitting displays, the technology allowed for credit card-sized calculators. One of the earliest calculators that featured this new technology was the Casio Mini Card LC-78, which ran for months on button cells.

LCD technology

The LCD technology on Casio calculators is based on the same design as that on Sharp and Texas Instruments calculators. Its display is a row of white LEDs arranged in a single line. The light from these LEDs is diffused by a light diffuser made of PMMA acrylic plastic, which is known as a light guide. Both types of light sources produce an even white spectral output, but CCFLs are less energy-efficient than LEDs because they require a special inverter to convert the DC voltage to 1000 V.

To produce a visible image, LCDs need an external source of light. This light source is located at the back of the glass stack and is called a "backlight." These displays are usually passive, but some models are backlit by using ambient light. Eventually, these types of displays became zero-power LCDs, which are completely energy-efficient. But before that, the technology behind LCDs was still in its infancy.

The LCD display can be small or full-screen. This is because the pixels of an LCD display do not flash between frames. There is no refresh-induced flicker with LCD monitors. However, the individual pixel response time of an LCD must be high, as too low a refresh rate causes visual artefacts. The other important factor is the response time of individual pixels. The latency of an LCD display is a measure of the response time of each pixel.

Digital-timepiece technology

The company first started producing electronic calculators in the mid-1960s. They used transistorized technology and eventually became the first company in the world to mass-produce electronic calculators. In 1965, Casio introduced the world's first desktop electronic calculator, which featured memory. Over the next several decades, the company expanded its product line, but its calculators remained its base of operation.

In 1983, Casio launched the G-Shock line of watches, which quickly became a craze in Japan and other developed nations. These watches could be used to measure altitude, depth, barometric pressure, and more. The line was so popular that, by 1998, Casio sold 19 million units of them, making them one of the most popular timepieces in the world.

The company has also recently launched the CA56-1 Databank, a gold-toned calculator with an LCD screen. It is water-resistant to 30 meters and features an eight-digit calculator. The databank has an alarm and a chronograph function. The watch also has a quartz-movement and is waterproof up to 30 metres. And because it is an important timepiece, the Casio calculators are now even more valuable than they were before.

Another important development in the Casio line of products was the introduction of LED and LCD technologies. Casio partnered with a company called Vodafone AirTouch Plc. By the time the millennium rolled around, the company was releasing new products and launching a mobile e-mail terminal with a wireless cellular telephone network. The company also marketed its handsets as shock and water-resistant.

Digital-diary technology

The Casio digital diary is a computerized organizer that holds thousands of to-do lists and memo addresses. This model has many features that make it a popular choice among working professionals and youth alike. It features an integrated telephone directory and schedule keeper, along with features such as world time, alarm, currency, and memo. In addition, the calculator also comes with an optional microSD card reader so it can be used for storing contacts.

When the first digital diaries came out, the first Casio calculator was the SF-R20. The SF-R20 featured 256 KB RAM and an ultra-thin design. Today, the digital diary is a distant memory, but it was still a major player in electronic organizers when they were released. In the early 1990s, Casio became a big player in the electronic organizer market. Its predecessor, the Rolodex, was a well-known index card holder. However, in the United States, it was sold as the Sharp Wizard.

The Casio brand also produces a variety of electronic products such as watches, electronic keyboards, and digital music instruments. In the 1980s, the company's timepiece line was stagnant and the company had to introduce new products to maintain demand. New models introduced by Casio included the first Casio pedometers and a phone dialer. The company also launched its first digital cellular handset during the fiscal year 2000.

Digital camera technology

The new digital camera technology on Casio calculators is a clever twist on the company's original spy camera design. It copies the design of a Casio DS-5500 camera, but has been made into a fully functional calculator. The camera can take pictures up to 1280x960 pixels at 30 frames per second, and records at 640x480 resolution. It also has a flash, allowing you to record videos on the go.

The company has been putting its weight behind the digital camera market, launching its Exilim line of cameras in the last decade. While this line of cameras has failed to ignite the market, the company has been able to remain a major player in the parts and software business. Its two brothers are still a varsity-educated trio of engineers despite their age. Kazuo, who is the youngest of the three, hopes to step down as CEO next year.

Casio is most famous for their calculators and digital watches, but they also produce keyboards, electronic dictionaries, cameras, and other electronic products. Their history of innovation has led to an extensive range of products from calculators to digital cameras, and even portable televisions. Casio is a Japanese multinational electronics company based in Tokyo, Japan. Founded in 1946, Casio was one of the first companies to introduce a TFT LCD screen into a consumer digital camera. In 1995, Casio patented the technology used in every TFT LCD screen made today.

Casio CLASSWIZ fx-991EX Review

casio classwiz

When deciding which scientific calculator to buy, you may be wondering which features the Casio CLASSWIZ fx-991EX has to offer. This review will help you to choose the right model by providing you with an overview of the main features, the power consumption, and the comparison of this calculator to other models. Keep reading for more information! The Casio Classwiz fx-991EX is the best choice if you are looking for a calculator that has a lot of features.

Features of the CLASSWIZ fx-991EX scientific calculator

The CLASSWIZ fx-991Ex is a scientific calculator with spreadsheet functionality. It has 274 functions and high-resolution LCD technology. Its advanced functions make it a powerful tool for scientific calculation and problem-solving. Moreover, it allows you to perform advanced functions, such as 4x4 matrix calculations and simultaneous equations of four unknowns. Moreover, it generates QR codes, displays graphs, and displays data.

The Casio ClassWiz fx-991EX scientific calculator has the largest screen of all its competitors, with four times more pixels than its competitors. Its screen is easy to read, and the titles of the columns and rows are clearly visible. This calculator also comes with a QR Code feature, which lets you visualize the equation and access the user manual.

It also has a 6 line display, which makes it easier to read long numbers. The fx-991EX has the ability to display fractions, radicals, and decimal approximations. This means it can help you solve difficult equations even if you don't know the answer. Moreover, the fx-991EX scientific calculator has a dedicated website for students to view and share graphs.

Another important feature of a scientific calculator is its ability to handle larger numbers and perform calculations in negative scientific notation. Its engineering special mode, or ENG display mode, is designed to help engineers communicate equations with others. It can also perform binary function solving, which requires two inputs. However, this feature may require more memory. But if you need a scientific calculator for your scientific work, you should check out these features and compare their prices.

Comparison with other models

Casio's fx-991EX has the largest screen of any scientific calculator. With four times as many pixels as other models, the screen is clear and easy to read. Unlike other scientific calculators, the ClassWiz has a color-coded keyboard and number entries in the bottom left corner of the display. The difference between the fx-991EX and fx-570EX is the type of battery used.

The fx-991EX has the largest memory, larger screen, and faster processor. However, there are a few differences between the two models. The FX-991EX has improved functions and can perform basic mathematical functions. For example, it can perform scientific calculations and perform numeric integration/differentiation. It can also calculate more rows in a table. Although these differences are not as significant as those between fx-991EX, it is still superior to other calculators in terms of features.

Spreadsheet function

The Casio ClassWiz fx-991EX is a calculator with a Spreadsheet function. This feature allows you to solve textbook formulas and perform more complex calculations. It can also convert graphs to a QR code, which your students can scan to view them on their device. For more information, visit the website dedicated to the Casio Classwiz calculator.

In addition to a calculator with a spreadsheet feature, the Casio CLASSWIZ fx-991EX scientific calculator offers a range of other advanced features, including a stylish design. It is equipped with a double-core processor and a double-sided memory. Its five-year warranty covers both accidental damage due to a power surge. It is also UK Exam approved. It also comes with battery backup and is powered by a solar panel or a backup battery. In addition, the calculator has a high-resolution screen that displays mathematic equations in a textbook-like manner.

Power consumption

The Casio ClassWiz fx-991EX uses solar power to power up. It uses very little power, so it can even be used while outdoors. This calculator comes with a protective slide-on case that covers the buttons and the screen when not in use. It is also easy to carry around, as it weighs only 260 grams. There is a USB cable included, and it can charge its batteries from the sun.


The Casio ClassWiz calculator is a powerful, portable calculator that boasts superior memory and performance. Its 47 constants are a welcome upgrade from the previous 40, and its navigation buttons are made of a silver material instead of plastic. With its test-permitted status, this calculator can replace a pen and paper. But be careful: Casio is also developing subsidiary models that lack the most important features of the original. If you don't want to spend as much as you would on the Casio ClassWiz, you may wish to purchase one of those. However, you will lose some benefits of using a calculator with an LCD screen.

The Casio Classwiz calculator is compatible with a number of computer applications. It is easy to use, and you can even access it regularly from your computer or a Classwiz emulator. In addition to the Casio Classwiz calculator, you will also need a smartphone with a camera, as your mobile device can be used to scan QR codes. Depending on which version you have, you may also want to consider buying a Casio EDU+ app.

Casio FX-991MS Scientific Calculator

When purchasing a Casio FX-991MS, you will want to make sure that you look at the manual. The manual is readily available online. The manual is filled with helpful information, including product specifications, manual size, and readability. If you have any questions about the Casio FX-991MS, you can contact a Casio service representative. You should also keep a copy of the manual on hand for future reference.

Display readability

The fx-991MS and the fx-991W calculators both have adjustable high-contrast displays, and the fx-991MS has a better display overall. The fx-991MS has an even higher contrast display and offers 15-digit precision, which may be good for differentiation, but it's too low to be useful in most cases. The fx-991W has a more traditional keyboard for navigating through menus and functions. Luckily, the fx-991MS also includes an adjustable auto-power off timer.

Equation solver

The Casio fx 991MS scientific calculator has an Equation Solver as part of the shift-solve functionality. The solver uses the Newton-Raphson numerical method to solve equations. This function works with equations containing one variable. The calculator is also able to solve multiple-variable equations. To use the solver, you should press "3" and input the value of a, b, and c. Once you've entered the correct value for c, press the "=" button to see the solution. You can also use the up arrow keys to move between solutions.

The Equation Solver built-in on the Casio fx-991MS scientific calculator is useful if you need to solve specific equations quickly and efficiently. The device solves quadratic, cubic, and even polar equations. Its other features include a STAT-data editor, drop resistance, and a protective hard case. When it comes to performance, the Casio fx-991MS excels.

Menu design

While the fx-991MS series' menu design isn't as bad as that of the fx-991EX, it isn't as effective. Instead of a single menu that contains all functions, the fx-991EX has a centralized menu that displays all the statistical information for the variables entered. This way, users can save time and avoid pressing multiple buttons.

Casio 991 Review

casio 991

Considering purchasing a CASIO 991 scientific calculator? If so, read on! We've got reviews of both models in this review, as well as the fx-82ES and fx-991ES Plus. Read on to find out what these calculators have to offer. They are both excellent choices for the budget-conscious student and professional alike. And, since we're talking about an affordable calculator, you can't go wrong!

CLASSWIZ calculators

Casio 991 CLASSWIZ calculators have extra-large displays that make data easier to read. In addition, the HR-100TM's buffer stores key operations to avoid data loss during high-speed input. With a 3.5-inch TFT color display, the Casio 991 CLASSWIZ calculator is a great addition to any student's toolkit.

The CLASSWIZ fx-991EX scientific calculator features intuitive icon displays that provide quick learning of stored variables and statistical calculation results. The list display function saves time by eliminating the need to recall individual values. It also supports advanced mathematical operations, such as 4 x 4-matrices calculations, simultaneous equations with four unknowns, quartile equations, and more. It also includes graphing and QR codes for added convenience.

Casio's fx-991EX scientific calculator has a full-featured spreadsheet feature. This feature allows users to create spreadsheets with up to 45 rows and five columns. It also supports up to 170 data items and boasts a high-resolution display. It displays mathematic equations in textbook-like format for easier understanding. There are also more than 12 apps available to enhance your productivity.

Another advantage of the fx-991EX is its super-fast performance. It can handle fractions, radicals, and decimals. The calculator's screen can even be protected with a slide-on case. This means you won't lose information when you're not using it. You'll have access to a dedicated website or see your graph directly on your device.

The Casio fx-991EX classwiz scientific calculator is arguably the best of all non-programmable calculators. It has a four-times higher resolution screen and is the most powerful non-programmable scientific calculator in the world. It can handle all math classes from pre-algebra to algebra 2, while also being under $20. It also has a QR Code feature that allows users to easily access a user manual.


The fx-82ES Casiometer is one of Casio's most popular calculators. Its natural textbook display allows you to see expressions in your textbook, without having to refer to a printed version. This innovative new feature is powered by a single AAA (R03) battery, which is said to last for up to two years. In addition, this calculator has a dual power option, which uses a small LR44 (GPA76) button battery and a solar cell to charge the battery. In Europe, this model is marketed as the fx-991es while in North America, it is sold under the name fx-115es.

Compared to the ES+ series, the Casio fx-991EX is a step up in features and price. Its hexadecimal and octal modes allow you to perform hexadecimal and oxadecimal arithmetic, and you can also use it for conversion factors. In addition to being programmable, it has more memory than older models. If you're an engineering student, you'll likely be using your calculator for quite some time, so you might as well invest in a scientific calculator that will last you for years.


You can take your engineering exams with the Casio FX-991ES plus. This calculator supports both graphing and higher scientific models and comes with a Natural Textbook Display. Its 417 functions can help you understand difficult math problems with ease. You can also choose between a graphing calculator and a non-programmable model. The difference between these two models lies in their capabilities.

The Casio FX-991ES is an excellent choice for high school students. This calculator features a built-in solar panel and a sliding plastic case that protects the face when not in use. It also comes with a battery backup and a two-year warranty. The CLASSWIZ fx-991ES is ideal for anyone studying for an upcoming exam or looking for a new calculator.

CLASSWIZ fx-991ES Plus

The CLASSWIZ fx-991EX for Casio 991 is a graphing calculator with 417 functions and a natural textbook display. It is allowed to take SAT and ACT tests. It also includes a QR code generator and allows students to print graphs, study guides, and sample SAT test questions from a smartphone.

Unlike the Casio 991MS, the fx-991ES Plus for Casian calculators has a wide textbook display and faster processing speed. Both calculators can perform conversions between various units of measurement. In addition, the fx-991ES Plus has a full list of conversions. This calculator is an ideal companion for those who need to make quick calculations in classes.


The Casio HR-100TM features a large extra-wide display for better reading of data. This instrument also features a buffer that stores key operations so data isn't lost during high-speed input. It's the perfect choice for any teacher or student who wants to take notes while on the go. This Casio 991 calculator is sure to impress.

The Casio ClassWIZ fx-991EX scientific calculator is the most user-friendly of all its competitors. It has the largest screen of any scientific calculator on the market, with four times as many pixels. This means that numbers are easy to see and navigate. The screen also has titles that help you to distinguish between rows and columns. The fx-991EX also allows you to perform 4x4 matrix calculations and simultaneous equations with four unknowns. It also lets you perform advanced statistical distribution calculations, including quartic equations.

The Casio fx-991EX scientific calculator also boasts a high-resolution display, which makes it easier to read formulas and symbols. The device supports up to one hundred and seventy data items. The Casio fx-991EX scientific calculator is also capable of running on solar power. It's compatible with Cambridge International Examinations. This calculator is also capable of displaying mathematic equations in textbook format.

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