Kenapa 1 Tambah 1 Sama Dengan 2

5 min read Jun 26, 2024
Kenapa 1 Tambah 1 Sama Dengan 2

Why 1 + 1 = 2: Understanding the Fundamentals of Mathematics

Have you ever wondered why 1 + 1 equals 2? It may seem like a simple question, but the answer lies in the very foundations of mathematics. In this article, we'll explore the reasons behind this fundamental truth and why it's essential for our understanding of the world around us.

The Concept of Numbers

To understand why 1 + 1 = 2, we need to go back to the basics of number systems. Numbers are a way of representing quantities or amounts. In our decimal system, we use 10 digits: 0 through 9. These digits can be combined in various ways to represent different numbers.

The Number 1

The number 1 represents a single unit or quantity. It is the building block of our number system. When we say "1," we mean one item, one object, or one unit of something.

The Number 2

The number 2 represents two units or quantities. It is the result of combining two single units together.

The Operation of Addition

Addition is a fundamental operation in mathematics that represents the combination of two or more quantities. When we add two numbers together, we are counting how many units we have in total.

The Concept of Counting

Counting is the process of assigning a numerical value to a set of objects. When we count objects, we are essentially adding one unit to the previous total for each object we add.

The Addition of 1 + 1

When we add 1 + 1, we are counting the total number of units we have. We start with one unit, and then we add another unit. This results in a total of two units, which we represent as the number 2.

The Laws of Arithmetic

The reason 1 + 1 equals 2 is because of the laws of arithmetic, which are the fundamental rules that govern mathematical operations. These laws ensure that mathematical operations are consistent and reliable.

The Commutative Law of Addition

The commutative law of addition states that the order of the numbers being added does not change the result. This means that 1 + 1 is the same as 1 + 1, and the result is always 2.

The Associative Law of Addition

The associative law of addition states that when we add multiple numbers together, the order in which we add them does not change the result. This means that (1 + 1) + 0 is the same as 1 + (1 + 0), and the result is always 2.


In conclusion, 1 + 1 equals 2 because of the fundamental principles of mathematics, including the concept of numbers, the operation of addition, and the laws of arithmetic. Understanding why 1 + 1 = 2 is essential for our understanding of the world around us, as it forms the basis of more complex mathematical operations and problem-solving skills.

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