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How to Get Remainder in Scientific Calculator FX 991EX

Scientific Calculator FX 991EX
Written by Kami Shah

Are you struggling with calculating remainders in math problems? Look no further than the scientific calculator fx 991ex. With this powerful tool, you can easily calculate remainders in a few simple steps.

In this comprehensive guide, we will show you how to use the fx 991ex calculator to perform remainder calculations with ease and accuracy.

Key Takeaways:

  • Scientific calculator fx 991ex is a powerful tool for calculating remainders.
  • With the calculator’s features, you can calculate remainders efficiently and accurately.
  • By following these step-by-step instructions, you’ll be able to solve math problems involving remainders with confidence.
  • Properly inputting values and utilizing the modulo function are crucial steps to obtaining accurate remainder values.
  • Practical applications of remainders exist in various mathematical contexts.

Understanding the fx 991ex Scientific Calculator

The fx 991ex scientific calculator is a versatile tool that offers a wide range of functions and features for solving complex mathematical problems. By familiarizing yourself with its capabilities, you can unlock its full potential and perform calculations more efficiently.

Let’s take a closer look at some of the scientific calculator functions and fx 991ex features that you should know:

Menu System Navigation

fx 991ex

The fx 991ex calculator has a user-friendly menu system that allows you to easily access various functions and settings. You can navigate through the menu using the arrow keys, and select options by pressing the corresponding number key.

The Shift button is used to access secondary functions, expanding the capabilities of the calculator even further.

Matrix and Vector Calculations

The fx 991ex calculator is equipped with matrix and vector functions that enable you to perform complex calculations involving matrices and vectors.

You can enter up to 4×4 matrices and vectors with up to four elements, and perform operations such as addition, subtraction, multiplication, and determinant calculation.

Natural Textbook Display

The natural textbook display feature of the fx 991ex calculator allows you to input and view mathematical expressions and equations in the same format as they appear in textbooks.

This makes it easier to read and understand complex mathematical expressions, and minimizes the risk of errors when inputting expressions.

Statistical Functions

The fx 991ex calculator comes with a range of statistical functions, including standard deviation, regression analysis, and probability distribution calculations.

These functions are useful for analyzing and interpreting statistical data, enabling you to draw insights and make informed decisions.

Graphing Functions

The fx 991ex calculator has graphing capabilities that allow you to visualize mathematical functions and equations in 2D and 3D graphs.

You can input and plot up to four functions at once, and customize the appearance of the graph by changing colors, line styles, and other parameters.

Multi-Functionality for Enhanced Problem Solving

The fx 991ex calculator is designed to handle a wide range of mathematical operations, from basic arithmetic calculations to complex algebraic equations.

Its advanced features and functions make it a valuable tool for students, engineers, scientists, and professionals who need to perform accurate and efficient calculations.

Accessing the Modulo Function

Before we can calculate the remainder, we have to access the modulo function on the fx 991ex calculator. The modulo function, represented by the % symbol, calculates the remainder of a division calculation. Here are the steps to access the modulo function:

  1. Press the MODE button.
  2. Select 3:STAT.
  3. Select 5:Remainder.

After following these steps, the calculator is now ready to perform modulo calculations, which will allow us to calculate remainders with ease.


Let’s say we have the problem 25 ÷ 7. We can easily calculate the remainder by following these steps:

1Enter the dividend (25)25
2Press the division symbol (÷)25 ÷
3Enter the divisor (7)25 ÷ 7
4Press the SHIFT button4 · 1
5Press the modulo symbol (%)4 · 1 %
6Press the equals symbol (=)4 · 1 % =

The result is 4, which is the remainder of 25 ÷ 7. With the modulo function, we can quickly and accurately calculate remainders for any division problem.

Entering the Dividend and Divisor

Before calculating the remainder using the fx 991ex calculator, it’s essential to input the dividend and divisor values correctly into the calculator. Here’s a step-by-step guide on how to do it:

  1. Turn on the calculator: Press the ON/C button.
  2. Select the division function: Press the ÷ button.
  3. Enter the dividend: Type in the dividend value, followed by the > button.
  4. Enter the divisor: Type in the divisor value, followed by the = button.

You can input decimal values by pressing the decimal point button (.). If you make a mistake while typing in the values, you can use the S button to delete previous digits.

It’s crucial to ensure that you input the correct values for the dividend and divisor to obtain accurate results. Incorrect inputs may lead to incorrect remainder calculation.

Performing the Division Calculation

Now that we have input the dividend and divisor, it’s time to perform the division calculation. Follow these steps:

  1. Press the division (÷) button on your calculator.
  2. Enter the dividend, followed by the = button.
  3. Enter the divisor, followed by the = button.

The quotient, or result of the division calculation, will be displayed on your calculator screen. For example, if you input 25 ÷ 7, your calculator will display 3.57142857.

Note: Your calculator may display a fraction instead of a decimal. To convert the fraction to a decimal, press the SHIFT and SD buttons simultaneously.

Applying the Modulo Function

With the division calculation completed, it’s time to apply the modulo function to determine the remainder. The modulo function calculates the remainder of integer division. In other words, it returns the remainder of the division operation between two numbers.

To apply the modulo function on the fx 991ex scientific calculator, follow these simple steps:

  1. Press the “SHIFT” key followed by “RCL” to open the “MODE” menu.
  2. Select the “COMP” tab, followed by “MOD” to access the modulo function.
  3. Input the divisor value and press the “=” key.
  4. Finally, press the “RMDR” key to obtain the remainder value.

For example, let’s calculate the remainder of 23 divided by 5:

23 ÷ 5 = 4 remainder 3

Using the fx 991ex calculator, we can obtain the remainder value of 3 as follows:

2 323
=remainder 3

By following these steps, you can quickly and easily obtain the remainder value for any given dividend and divisor. Congratulations, you have now mastered the modulo function and can confidently compute remainders on the fx 991ex calculator!

Interpreting and Utilizing the Remainder

Now that you’ve calculated the remainder, it’s time to understand what it signifies and how it can be used in practical applications.

Interpreting the remainder is critical in various fields, such as engineering, finance, and computer programming.

Simply put, the remainder is the amount left over after division. It represents the fractional part of the result, which cannot be expressed as a whole number.

However, it can still hold significant meaning in different contexts.

“In modular arithmetic, the remainder is used to represent equivalence classes of integers under division. This concept is widely used in cryptography and computer science.”

For example, in the field of cryptography, the remainder is an essential component in creating secure encryption algorithms.

By using the remainder to represent equivalence classes of integers, cryptographic functions can operate efficiently and securely.

In finance, the remainder can be used to calculate interest rates and loan payments.

By taking the remainder of a loan or investment amount, financial professionals can determine the precise amount of interest or dividend earned at the end of a given period.

In computer programming, the remainder is a common operator used in looping and array calculations.

By understanding how to interpret the remainder in these contexts, programmers can optimize their code and create more efficient algorithms.

As you can see, understanding the remainder is crucial in various fields and can be used to solve complex problems.

By applying the techniques you’ve learned in this guide on the scientific calculator fx 991ex, you can confidently and accurately calculate remainders, unlocking a world of possibilities in problem-solving.

Tips and Tricks for Efficient Remainder Calculations

Calculating remainders is a crucial part of solving many mathematical problems, and doing it efficiently can save you time and effort. Here are some tips and tricks to help you streamline your remainder calculations on the fx 991ex calculator:

Create a Shortcut

Instead of going through the entire process of accessing the modulo function every time you need to find the remainder, create a shortcut by saving the function in your calculator’s memory. This way, you can access it quickly and easily whenever you need it.

Use the ANS Button

After performing a division calculation, the answer is stored in the calculator’s memory.

Instead of re-entering the quotient, simply use the ANS button to recall the result and input it into the modulo function. This saves you time and minimizes the risk of error.

Round Up or Down

When performing a division calculation to get the quotient, round up or down to the nearest whole number depending on the context of the problem.

This can make the remainder calculation easier and may also help with interpreting the result.

Double-Check Your Input

Before performing any calculation, double-check that you have entered the correct values for the dividend and divisor.

A simple mistake can lead to an incorrect remainder, wasting time and potentially resulting in the wrong answer.

By utilizing these tips and tricks, you can improve your efficiency in calculating remainders on the fx 991ex calculator and become a more skilled problem solver.

Practice Exercises to Master Remainder Calculations

To improve your skills in calculating remainders using the scientific calculator fx 991ex, we have prepared the following practice exercises. Try to solve them on your own using the step-by-step guide we have provided.

Then, check your answers against the solutions we have included below. By completing these exercises, you will gain confidence in your ability to calculate remainders quickly and accurately.

Exercise 1:

Calculate the remainder when 258 is divided by 13.

Your Solution:

Dividend (258)258
Divisor (13)÷13
RemainderShift + Rmdr

Your solution: 9

Exercise 2:

Find the remainder when 381 is divided by 17.

Your Solution:

Dividend (381)381
Divisor (17)÷17
RemainderShift + Rmdr

Your solution: 10

Exercise 3:

If the remainder of 1001 divided by 19 is x, what is the value of x?

Your Solution:

Dividend (1001)1001
Divisor (19)÷19
RemainderShift + Rmdr

Your solution: 5

Exercise 4:

What is the remainder when 101 is divided by 7?

Your Solution:

Dividend (101)101
Divisor (7)÷7
RemainderShift + Rmdr

Your solution: 3

Practice makes perfect. By working through these exercises and utilizing the fx 991ex calculator, you’ll soon be calculating remainders with ease and confidence.

With these skills, you’ll be able to tackle even the most complex mathematical problems.

Master Remainder Calculations with fx 991ex

By following this comprehensive guide, you’ve learned how to easily calculate remainders using the scientific calculator fx 991ex.

With your newfound knowledge and skills, you’ll be able to solve mathematical problems involving remainders with efficiency and accuracy.

Taking Advantage of Your New Capabilities

Now that you’ve learned how to access and utilize the modulo function, input dividend and divisor values, and perform division and modulo calculations, you can apply your expertise to various mathematical contexts.

You can use your skills to calculate remainders in number theory, cryptography, and computer programming.

You can also leverage your knowledge to solve everyday problems, such as dividing a pizza among friends or determining how many bags of fertilizer to purchase for a garden.

The More You Know, the Better You Get

To improve your skills and efficiency in calculating remainders, it’s essential to practice regularly.

Challenge yourself with different types of problems and explore new mathematical domains that require remainder calculations.

By mastering remainder calculations, you’ll become a more capable and confident problem solver.

Your newfound abilities will help you excel in your academic pursuits, professional endeavors, and personal projects.

Start Applying Your Knowledge Today

Take the first step in mastering remainder calculations by applying the techniques and tips outlined in this guide.

Explore the different features and functions of the fx 991ex calculator and experiment with various calculation scenarios.

By persevering through difficult problems and practicing regularly, you’ll soon become an expert in remainder calculations. The more you learn and apply, the better you’ll get.

Thank you for reading this guide, and we hope you found it helpful in your quest to master remainder calculations with fx 991ex.

Pros and Cons of scientific calculator fx 991ex


  • High Functionality: The FX-991EX offers a wide range of functions, including basic arithmetic, statistical calculations, complex number calculations, and equation solving.
  • Dual Power Source: It can be powered by both solar cells and a replaceable battery, providing flexibility and reducing the need for frequent battery changes.
  • High-resolution Display: The calculator features a high-resolution LCD display, making it easy to read and interpret results, equations, and graphs.
  • Large Memory Capacity: It has a substantial amount of memory, allowing users to store and recall data and calculations.
  • Multi-replay Function: This feature allows users to step back through calculations to review and edit previous entries, enhancing user flexibility and reducing the chances of errors.
  • Matrix and Vector Calculations: The calculator supports matrix and vector calculations, which is useful for students and professionals in fields like engineering and physics.
  • QR Code Functionality: The FX-991EX can generate QR codes representing equations and calculations, enabling easy sharing and collaboration.
  • Natural Textbook Display: The calculator can display mathematical expressions in a format that resembles textbook notation, making it more intuitive for users to input and understand complex expressions.


  • Complex for Beginners: The wide range of functions and features may be overwhelming for beginners who are not familiar with advanced scientific calculations.
  • Learning Curve: Due to its extensive capabilities, users may need some time to learn and master all the functions, especially if they are new to scientific calculators.
  • Build Quality: Some users have reported concerns about the build quality, suggesting that the calculator may not be as durable as some other models.
  • Price: The FX-991EX, while feature-rich, might be considered relatively expensive compared to basic calculators. However, the cost is justified for those who need its advanced functionalities.
  • Graphing Limitations: While it can handle basic graphing, it doesn’t have the advanced graphing capabilities of more specialized graphing calculators.
  • Limited Programmability: The calculator has limited programmability, which may be a drawback for users who require more advanced programming capabilities.
  • Small Keypad: Some users with larger fingers may find the keypad on this calculator a bit small and cramped.


How can I calculate remainders using the scientific calculator fx 991ex?

To calculate remainders using the scientific calculator fx 991ex, you can follow the step-by-step instructions provided in this comprehensive guide. It will walk you through the process of inputting values, performing division calculations, and using the modulo function to determine the remainder accurately.

Why is it important to understand the functions and features of the fx 991ex scientific calculator?

Familiarizing yourself with the functions and features of the fx 991ex scientific calculator is essential because it allows you to navigate its menu system and utilize its capabilities effectively. This knowledge enhances your problem-solving abilities and ensures accurate and efficient calculations.

How do I access and utilize the modulo function on the fx 991ex calculator?

The modulo function, which is crucial for calculating remainders, can be accessed through the menu system of the fx 991ex calculator. This section of the guide will provide detailed instructions on how to access and utilize the modulo function, empowering you to calculate remainders effortlessly.

What are the steps to enter the dividend and divisor in the fx 991ex calculator?

In order to calculate remainders, you need to input the correct values for the dividend (the number being divided) and the divisor (the number by which the dividend is divided). This section of the guide will guide you through the process of entering these values accurately into the fx 991ex scientific calculator.

How do I perform the division calculation on the fx 991ex calculator?

Once you have entered the dividend and divisor values, the next step is to perform the division calculation. This section of the guide will provide clear instructions on how to execute the division calculation correctly on the fx 991ex scientific calculator, ensuring accurate results for determining the remainder.

How can I use the modulo function to determine the remainder?

With the division calculation completed, the modulo function is applied to determine the remainder. This section of the guide will walk you through the necessary steps to efficiently apply the modulo function on the fx 991ex scientific calculator, enabling you to obtain the remainder value accurately.

What is the significance of interpreting the remainder and how can it be utilized in practical applications?

Understanding the significance of the remainder is essential in various mathematical contexts. This section of the guide will explore practical applications where knowing the remainder is crucial for problem-solving. It will provide insights on how to interpret the remainder and utilize it effectively.

Are there any tips and tricks to make remainder calculations more efficient?

Yes! In this section of the guide, we will share valuable tips and tricks that can streamline your remainder calculations on the fx 991ex scientific calculator. These shortcuts and techniques will help you save time and perform calculations with greater ease, improving your overall efficiency.

How can I improve my skills in calculating remainders using the fx 991ex calculator?

To reinforce your understanding and skills in calculating remainders, this guide includes practice exercises for you to solve using the fx 991ex calculator. By working through these exercises, you will gain confidence and proficiency in remainder calculations, ultimately improving your overall skills.

What should I do now that I have completed this guide?

Congratulations on completing this comprehensive guide on how to calculate remainders using the scientific calculator fx 991ex! You now have the knowledge and skills to effortlessly calculate remainders using this powerful calculator. Start applying your newfound expertise and conquer math problems with ease.

About the author

Kami Shah

I am a freelance writer and social media expert. With a passion for crafting compelling content and a deep understanding of online platforms, I create engaging articles, blogs, and posts that captivate audiences. My expertise in social media strategy, content planning, and audience engagement allows me to help businesses thrive in the digital landscape.