Math Example: Algebra Tiles: Example 17

Topic

Numerical and Algebraic Expressions

Description

This example illustrates solving the equation x + (-2) = 5 using algebra tiles. The image shows green tiles representing the variable x, yellow tiles representing positive integers, and red tiles representing negative integers. By strategically moving pieces and creating zero pairs, students can visually determine that x = 7.

Algebra tiles are a powerful tool for teaching numerical and algebraic expressions, especially when dealing with equations involving negative numbers. By providing a visual and tactile representation of abstract concepts, these tiles help students develop a concrete understanding of mathematical operations. This approach is particularly beneficial for students who struggle with traditional abstract methods, as it allows them to physically manipulate the tiles and observe the outcomes of different operations.

Presenting multiple worked-out examples is crucial for students to fully grasp mathematical concepts. Each example offers a new perspective on the topic, allowing students to see how the same principles apply in different scenarios. This repetition and variety help reinforce the underlying concepts, improve pattern recognition, and develop problem-solving skills.

Teacher Script: "Now, let's solve the equation x + (-2) = 5 using algebra tiles. We start with a green tile for x and two red tiles on one side, and five yellow tiles on the other side. To solve for x, we need to add two yellow tiles to both sides to create zero pairs with the red tiles. What do we have left? We see that x equals seven yellow tiles. How does this method help you understand equations with both positive and negative numbers?"

For a complete collection of math examples related to Numerical and Algebraic Expressions click on this link: Math Examples: Algebra Tiles Collection.