Context

Mathematics is an extremely important tool in our daily lives, being applied in various situations around us. To better understand this, in this project, we will explore a fundamental aspect of Mathematics: operations with decimals.

In the first part of our study, we must understand why decimal numbers are so important. We are constantly performing operations with these numbers, whether it's when shopping at the market, calculating distances, measuring temperatures, checking our change when paying a bill, among others. Knowing them is therefore a fundamental aspect of our practical life.

Have you ever heard that decimal numbers are essential for science and technology? That's right! Without the knowledge of them, it would be almost impossible to perform precise calculations. Imagine an engineer trying to calculate the amount of material needed to build a house without using decimal numbers? It would be a difficult task, that's why the use of decimals is crucial in many fields of knowledge.

The use and mastery of operations with decimals are strongly present in our lives. In the business world, for example, prices are usually expressed in decimals. In our daily lives, we use decimals to deal with money, measure lengths, and calculate percentages. In summary, decimal numbers play a crucial role in many aspects of our life and work.

If you need support for studying, here are some reliable sources of information to help you study and delve deeper:

1. Khan Academy: Decimal Operations
2. Só Matemática: Decimal Numbers
3. Matemática Divertida: Decimal Operations Game

Remember: the basis for good learning is dedication and practice. So, let's get to work!

Practical Activity

Activity Title: "Deciphering the World of Decimals"

Project Objective

Through this project, students should be able to understand and apply operations with decimals. The main objective is for students to understand the real application of these operations in everyday life, enhancing their mathematical skills and critical thinking when solving problems.

Detailed Project Description

This project consists of creating a "Decimal Market", where students must create products and their prices in decimals, make purchases and sales using these prices, and finally, they must calculate the profitability of their "business". Students will work in groups of three to five members.

Required Materials

• Sheets of paper, pencils, and erasers.
• Calculator
• Books and online resources for research.

Step-by-Step for Carrying Out the Activity

1. Each group must create a product catalog for their "Decimal Market". The prices for each product must be expressed in decimals.
2. Next, the groups will make "purchases" and "sales" among themselves, recording all transactions made.
3. Each group must calculate the total amount spent on purchases and the total amount earned from sales, as well as the profit or loss obtained.
4. Using the acquired knowledge, students must create mathematical problems involving the operations with decimals that were used in the "Decimal Market".
5. Finally, each group must solve the problems created by the other groups.

Project Deliverables and Connection to Activities

At the end of the project, each group must submit a report containing:

1. Introduction: contextualization of the theme, its relevance and application in the real world, and the project's objective. Students must explain the importance of operations with decimals and how they are applied in daily life.

2. Development: students must explain the theory behind operations with decimals, describe in detail the activity carried out, the methodology used, and present the results obtained. The recording of "purchases" and "sales", the calculations of totals and profit or loss, as well as the elaboration of mathematical problems and their resolutions must be detailed in this section.

3. Conclusion: students must summarize the main points of the work, explaining the learnings obtained and the conclusions about the project. Students must reflect on the importance of operations with decimals in everyday practice, revisiting the examples of the activity carried out.

4. Bibliography: list of research sources used in the project.

This report must be written clearly and objectively, and must highlight the learning acquired during the project development. It should be a way to show how theory was applied in practice, and how students were able to work as a team to solve the proposed challenges.