Chapter 2.1
Introduction to integer addition
What You'll Learn
Represent positive and negative integers using visual models with colored circles
Write addition statements for integer combinations using bracket notation
Apply the zero pairs concept where positive and negative ones cancel out
Solve real-world word problems involving gains, losses, and temperature changes
Identify opposite integers using number lines and equal distance from zero
What You'll Practice
1
Writing addition statements from diagrams with red and blue circles
2
Pairing positive and negative circles to find sums visually
3
Solving word problems about spending, donating, studying, and temperature
4
Finding opposites of integers on number lines by counting distance from zero
Why This Matters
Integer addition is essential for understanding positive and negative numbers in real life, from tracking money spent and earned to measuring temperature changes. Mastering this skill prepares you for algebra, working with equations, and making sense of situations involving gains and losses.
Before You Start — Make Sure You Can:
This Unit Includes
11 Video lessons
Practice exercises
Skills
Integer Addition
Positive and Negative Numbers
Zero Pairs
Number Line
Opposites
Visual Models
Word Problems
