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7th Grade Math
4. MA.7.NSO.2.2
4.5 Subtracting integers
Subtracting Integers
Subtract integers with one rule: subtracting a number is the same as adding its opposite.
What You'll Learn
Subtracting integers is subtraction where numbers can be positive or negative.
Key rule: subtracting a number is the same as adding its opposite (a - b = a + (-b)).
On a number line, subtracting a positive moves left; subtracting a negative moves right.
Example: 3 minus negative 4 becomes 3 + 4 = 7.
Once rewritten as addition, use the rules for adding integers.
What You'll Practice
1
Subtracting integers using number lines with directional arrows
2
Converting subtraction statements into addition by reversing signs
3
Solving vertical subtraction problems with borrowing
4
Working through real-world problems like temperature differences and elevator floors
Why This Matters
Subtracting integers is essential for solving equations, working with negative numbers in algebra, and handling real-world situations like temperature changes, elevation differences, and financial calculations. This skill builds the foundation for advanced math courses.
Before You Start — Make Sure You Can:
This Unit Includes
17 Video lessons
Practice exercises
Learning resources
Skills
Integer Subtraction
Number Lines
Negative Numbers
Vertical Subtraction
Sign Rules
Borrowing
Order of Operations
FL Curriculum Aligned