Contextualization

Introduction

Hello, little mathematicians! Did you know that mathematics is present in our lives in various ways? It is in our favorite games, in the music we listen to, in the stories we read, and even in the groceries we buy at the supermarket. Today, we are going on a very fun journey with mathematics, exploring the wonderful world of composing and decomposing numbers smaller than 100.

The Importance of Numbers and Their Compositions

You know how to count, right? That is an example of how we use numbers in our daily lives. When you buy a candy and pay with your coins, you are using numbers to understand the value and quantity. But, besides just counting, mathematics helps us understand how numbers relate to each other, and that's where composition and decomposition of numbers come in.

Composing numbers is the way we combine two or more numbers to form a larger number. For example, combining the number 2 with the number 5, we get the number 25. Decomposing numbers, on the other hand, is when we divide a number into smaller parts. For example, the number 25 can be decomposed into 20 and 5.

These skills are crucial for the development of logical reasoning and for understanding the more complex mathematical concepts you will learn throughout your school lives. Understanding how numbers are composed and decomposed helps us better understand mathematical operations, such as addition and subtraction. Additionally, it allows us to solve problems more efficiently and creatively.

Mathematics is like a big puzzle, and composing and decomposing numbers are some of the most important pieces. Are you ready to start unraveling this mystery? Then, let's go!

Practical Activity

Activity Title: "Composing and Decomposing the Kingdom of Numbers"

Project Objective

This project aims to help students understand the composition and decomposition of numbers smaller than 100 in a playful and fun way. Additionally, it aims to develop socio-emotional skills such as teamwork, problem-solving, communication, creativity, and time management.

Detailed Project Description

In this project, students will become "Math Detectives" and embark on an exciting mission to uncover the secrets of numbers smaller than 100. In groups, they will create board games that involve the composition and decomposition of numbers. This game will be both the learning tool and the final product of the project.

Required Materials

• Large cardboard or poster board to make the game board.
• Colored pens, colored pencils, and/or crayons.
• Dice.
• Player pieces (can be made with cardboard or bottle caps, for example).
• Small cards or post-its to write the game rules.

Detailed Step-by-Step Guide for Activity Execution

1. Group Formation and Leader Definition: Divide the class into groups of 3 to 5 students. Each group should choose a leader to coordinate the activities and ensure that everyone participates.

2. Game Planning: The group should gather and brainstorm a theme for their game. It can be an adventure game, a question and answer game, a racing game, etc. The important thing is that the game has challenges involving the composition and decomposition of numbers.

3. Board and Rules Creation: With the game theme chosen, students should draw the board on cardboard or poster board and write the game rules on small cards or post-its. Remember to include situations in the game that involve the composition and decomposition of numbers.

4. Game Testing and Adjustments: After creating the game, the group should test it. During the test, they should check if the rules are clear, if the game is fun, and most importantly, if the mathematical challenges are well elaborated.

5. Game Presentation: Finally, each group will present their game to the class. During the presentation, the "Math Detectives" should explain how the game works and how it helps understand the composition and decomposition of numbers.

Once the project is completed, each group should deliver their game to the teacher, who will evaluate both the final product and the participation and performance of each student throughout the process.

Let's go, little detectives! Mathematics is waiting for you!

Delivery Format

Each group must deliver the game created to the teacher. Additionally, students should write a brief report telling about their experience of creating the game, what were the main difficulties, and how they managed to overcome them. The report can be handwritten or typed and must be delivered along with the game.