Unit 19: Intro to Negative Numbers and Integers

Day 2 of 30

Place negative numbers on a number line

3-5Mathematics

Content is AI-assisted and continuously improved through educator review

Learning Objective

Students will be able to explore place negative numbers on a number line.

Today's Lesson

In this lesson, we'll explore place negative numbers on a number line. Mathematical thinking develops logical reasoning and problem-solving abilities.

A number line is a line with numbers marked at equal spaces. It helps us see the order of numbers and the distance between them. We can use a number line to count forward, count backward, add (move right), or subtract (move left). For example, to add 3 + 2, start at 3 and jump 2 spaces to the right—you land on 5! Number lines help us visualize numbers and operations.

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
Number

A mathematical value used for counting and measuring

Problem

A mathematical question requiring analysis and solution

Activities
Instructions
1. Review the example problems for place negative numbers on a number line. 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

On a number line, if you start at 4 and jump 3 spaces to the right, where do you land?

Hint: Count forward: 5, 6, 7.
2

What number is halfway between 10 and 20?

Hint: Find the middle.
3

Use a number line to solve: 8 - 2 = ___

Hint: Start at 8, jump left 2 spaces.

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 place negative numbers on a number line.

AI Tutor

Get instant help with this lesson. Ask questions and receive personalized explanations from your AI tutor.