Unit 19: Intro to Negative Numbers and Integers

Day 5 of 30

Learn about absolute value

3-5Mathematics

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Learning Objective

Students will be able to explore learn about absolute value.

Today's Lesson

In this lesson, we'll explore learn about absolute value. Mathematical thinking develops logical reasoning and problem-solving abilities.

Absolute value is the distance a number is from zero on the number line, without caring about direction. We write it with bars: |x|. The absolute value is always positive or zero. For example, |5| = 5 and |-5| = 5 (both are 5 units from zero). Absolute value tells you "how far" without telling you "which way." It's useful for finding distances, temperatures differences, and solving equations!

As you work through today's material, pay attention to the examples and try to identify the patterns or strategies being used. This will help you apply these concepts to new problems.

Take notes on key points and make connections to what you've already learned in previous lessons.

Key Terms
Problem

A mathematical question requiring analysis and solution

Solution

The result obtained by solving a problem

Activities
Instructions
1. Review the example problems for learn about absolute value. 2. Identify the steps and strategies used. 3. Work through practice problems independently. 4. Compare solutions with a partner.
Materials Needed
  • Notebook
  • Calculator (if needed)
  • Graph paper
Practice Problems
1

Find: |-8|

Hint: Distance from zero, always positive.
2

Find: |12|

Hint: 12 is already positive.
3

Which is greater: |-5| or |3|?

Hint: Compare distances: |-5| = 5, |3| = 3

Teaching Tip

For this age group: Balance direct instruction with collaborative activities. Allow students to explain their thinking and make connections to prior knowledge when exploring learn about absolute value.

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