Operaciones Combinadas 1 ESO PDF Free Download


In the exciting world of mathematics, 1st ESO (Educación Secundaria Obligatoria) students are introduced to a fundamental concept known as “operaciones combinadas,” which translates to “combined operations” in English. These operations serve as the building blocks for more advanced mathematical concepts and problem-solving skills. In this article, we’ll delve into the intricacies of operaciones combinadas 1 eso, exploring what they are, how to perform them, and their real-world applications.

Understanding Operaciones Combinadas

What Are Operaciones Combinadas?

Operaciones combinadas refer to the practice of combining different mathematical operations within a single equation. These operations typically include addition, subtraction, multiplication, and division. The goal is to solve the equation by following a specific order of operations, often abbreviated as PEMDAS (Parentheses, Exponents, Multiplication and Division, Addition and Subtraction).

The Order of Operations

To successfully perform operaciones combinadas, it’s crucial to follow the order of operations diligently. This ensures that the results are accurate and consistent. The order of operations is as follows:

1. Parentheses

In any equation, operations enclosed in parentheses should be performed first. This step allows for the simplification of complex expressions.

2. Exponents

After dealing with parentheses, the next step is to evaluate any exponents or powers in the equation. This involves raising numbers to a given exponent.

3. Multiplication and Division

Following exponents, multiplication and division operations should be carried out from left to right. These operations have equal priority.

4. Addition and Subtraction

The final step involves performing addition and subtraction operations from left to right. Like multiplication and division, these operations have equal priority.

Also Read This : The Pit And The Pendulum

Solving Equations with Operaciones Combinadas

Now that we’ve established the fundamentals, let’s put them into practice with a few examples.

Example 1: Basic Combined Operations

Consider the equation: 2+(3∗4)−52+(3∗4)−5

  1. Start by solving the expression within the parentheses: 3∗4=123∗4=12.
  2. The equation becomes: 2+12−52+12−5.
  3. Now, perform addition and subtraction from left to right: 2+12=142+12=14, and 14−5=914−5=9.

The solution is 99.

Example 2: More Complex Combined Operations

Let’s tackle a slightly more complex equation: 6∗(2+3)/46∗(2+3)/4

  1. Begin with the expression inside the parentheses: 2+3=52+3=5.
  2. The equation becomes: 6∗5/46∗5/4.
  3. Now, perform multiplication and division from left to right: 6∗5=306∗5=30, and 30/4=7.530/4=7.5.

The solution is 7.57.5.

Real-World Applications

Operaciones combinadas are not just theoretical concepts; they have practical applications in various fields. Here are a few examples:


In finance, calculations involving interest rates, investments, and loans often require the use of operaciones combinadas. Determining the final amount after a series of compound interest calculations is a prime example.


Engineers use combined operations to solve complex equations related to structural analysis, fluid dynamics, and electrical circuits. These operations help ensure the safety and efficiency of engineering designs.

Computer Science

In programming and computer science, operaciones combinadas play a crucial role in developing algorithms and solving computational problems. Efficient code often relies on correctly implemented mathematical operations.


Operaciones combinadas 1 eso provide the foundation for mathematical problem-solving and critical thinking. By understanding the order of operations and practicing with various equations, students can unlock the power of mathematics in everyday life.

If you’re ready to embark on your journey into the world of mathematics, remember to follow the order of operations diligently, and you’ll find that operaciones combinadas are not as perplexing as they may seem at first glance.


Q: What if I don’t follow the order of operations in operaciones combinadas?
Not following the order of operations can lead to incorrect results. It’s essential to follow the established rules to ensure accuracy in your calculations.

Q: Can operaciones combinadas be applied to advanced mathematics?
Yes, the concept of combined operations serves as a fundamental building block for more complex mathematical concepts encountered in higher education.

Q: Are there any shortcuts for solving equations with operaciones combinadas?
While some equations may have shortcuts, it’s best practice to follow the order of operations to guarantee accurate results, especially in educational settings.

Q: How can I improve my skills in operaciones combinadas?
Practice is key to improving your skills. Work through a variety of equations and seek assistance from teachers or tutors when needed.

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