Related Facts – Definition With Examples

Welcome to Brighterly, your trusted source for making complex mathematical concepts simpler and more fun for children. Today, we’re diving into the intriguing world of related facts. From classroom arithmetic to real-life applications, related facts permeate many aspects of our daily lives. But what exactly are related facts? How can we identify and apply them, especially within the realm of mathematics?

In this comprehensive guide, we’re setting out to answer these questions and more. We’ll explore definitions, delve into examples, uncover their unique properties, and highlight their importance in mathematical fluency. Alongside, we’ll also tackle the differences between related and unrelated facts, the art of writing equations with related facts, and wrap it up with some practice problems. Whether you’re a math enthusiast, a curious student, or a dedicated parent, this exploration promises a wealth of understanding to brighten your mathematical journey!

What Are Related Facts?

When we talk about related facts, we are referring to a group of facts that share a relationship through their numbers. For instance, if we take the numbers 2, 3, and 5, we could form the related facts 2+3=5 and 5-2=3. These statements are related because they involve the same numbers but present them in different ways. The same numbers, organized differently, result in a different relationship, thus creating a different fact.

Definition of Related Facts

Defining related facts is straightforward: related facts are math statements that share the same numbers but use different operations, such as addition/subtraction or multiplication/division. They reveal the commutative and reversal properties of these operations. The numbers stay the same, but how they interact changes. This is a valuable concept in early math education, as it helps children understand the inverse relationships that exist in arithmetic.

Examples of Related Facts

Let’s consider a few examples to illustrate the concept of related facts. If we take the numbers 4, 5, and 20, we can form the multiplication fact 45=20. If we switch the numbers around, we have 54=20. These are related facts because they involve the same numbers and the same operation but in a different order, demonstrating the commutative property. We can also form the related division facts 20/4=5 and 20/5=4, illustrating the reversal property.

Properties of Related Facts

There are a couple of important properties at work in related facts. The commutative property says that you can swap numbers around in addition or multiplication and still get the same answer (3+2 = 2+3 and 45 = 54, for example). The reversal property shows that you can reverse the operation from multiplication to division (or addition to subtraction) and still find a valid relationship between the numbers (2+3=5 becomes 5-2=3, and 4*5=20 becomes 20/4=5).

Understanding the Nature of Related Facts

Related facts are more than just arithmetic relationships; they reflect a deeper understanding of the nature of numbers and operations. In a sense, they can be thought of as the “grammar” of math – the way numbers and operations combine to form meaningful statements. This understanding is crucial for developing mathematical fluency and comfort with number manipulation.

Properties of Addition and Subtraction in Related Facts

In related facts, addition and subtraction are tightly linked. The addition facts (such as 2+3=5) and their related subtraction facts (5-2=3 and 5-3=2) illustrate the inverse relationship between addition and subtraction. Understanding these properties aids in solving more complex math problems and contributes to numerical fluency.

Properties of Multiplication and Division in Related Facts

Multiplication and division share a similar relationship. If you know the multiplication facts (like 4*5=20), you can use them to derive the related division facts (20/4=5 and 20/5=4). Understanding this connection can dramatically speed up mental calculations and aid in the comprehension of more advanced math concepts.

Difference Between Related and Unrelated Facts

While related facts share common numbers, unrelated facts do not. For example, 2+3=5 and 5-2=3 are related because they involve the same numbers. However, 2+3=5 and 6-4=2 are unrelated because they do not share the same numbers. Understanding the difference between related and unrelated facts can further deepen children’s mathematical intuition.

Equations Involving Related Facts

The related facts concept extends beyond simple number facts to encompass equations. For instance, if we know that a+b=c, we can deduce that c-a=b and c-b=a. Understanding this equivalence is crucial in algebra, where we often need to rearrange equations to solve for a particular variable.

Writing Equations with Related Facts: Addition and Subtraction

In writing equations with related facts, the numbers involved stay the same, but the order and operation can change. If we start with the addition equation a+b=c, we can write the related subtraction equations c-a=b and c-b=a.

Writing Equations with Related Facts: Multiplication and Division

Similarly, if we start with the multiplication equation a*b=c, we can write the related division equations c/a=b and c/b=a. These related equations underscore the inverse relationship between multiplication and division, as well as the commutative property of multiplication.

Practice Problems on Related Facts

To truly grasp related facts, practice is key. Try solving problems that involve identifying and creating related facts. For example, given the numbers 3, 4, and 12, can you write all the related multiplication and division facts? What about the related addition and subtraction facts for the numbers 6, 7, and 13?


As we conclude our journey with related facts, it’s clear that these concepts are more than just an essential mathematical tool. They form an integral part of our cognitive abilities, helping us decipher patterns, make predictions, and solve problems efficiently. At Brighterly, we believe that empowering children with this knowledge and understanding will light up their paths, making them confident, creative thinkers in this numerically driven world. By fostering a deep understanding of related facts, we’re nurturing their ability to see the intricate beauty of numbers and their interrelationships. After all, isn’t learning all about making connections and finding patterns that make sense of the world around us?

Frequently Asked Questions on Related Facts

Why are related facts important in mathematics?

Related facts are important in mathematics because they help establish a fundamental understanding of the relationships between numbers and operations. By grasping this, children can more easily recognize patterns, make predictions, and solve problems more efficiently.

What is the main difference between related and unrelated facts?

Related facts share a common set of numbers but use them in different operations, while unrelated facts do not share the same set of numbers. For example, 2+3=5 and 5-2=3 are related facts because they involve the same numbers in different operations. In contrast, 2+3=5 and 6-4=2 are unrelated because they do not share the same numbers.

How can practicing related facts help improve problem-solving skills?

Practicing related facts can greatly improve problem-solving skills by enhancing a child’s number sense and numerical fluency. They begin to see patterns and connections between different operations and understand the inverse relationships that exist in arithmetic, all of which are critical in solving complex problems.

Are related facts relevant only to addition and subtraction or multiplication and division?

While related facts are most commonly associated with addition/subtraction and multiplication/division, the concept extends to other operations and even algebra. For example, if we know that a+b=c, we can derive that c-a=b and c-b=a. This understanding of the equivalence between different forms of an equation is crucial in algebra.

Information Sources
  1. Related Facts
  2. Reversal Property
  3. Math Education

Math Catch Up Program

Image -Math Catch Up Program
  • Learn Math Simple - Fast - Effective
  • Overcome math obstacles and reach new heights with Brighterly.

Kid’s grade

  • Grade 1
  • Grade 2
  • Grade 3
  • Grade 4
  • Grade 5
  • Grade 6
  • Grade 7
  • Grade 8

Simple - Fast - Effective
Overcome math obstacles and reach new heights with Brighterly.

Select Your Grade
Table of Contents

Kid’s grade

  • Grade 1
  • Grade 2
  • Grade 3
  • Grade 4
  • Grade 5
  • Grade 6
  • Grade 7
  • Grade 8
Image full form