Chapter 3.5
Subtraction facts up to 100
What You'll Learn
Recognize the relationship between addition and subtraction within fact families
Identify missing facts in addition and subtraction fact families up to 100
Apply inverse operation properties to complete fact family sets
Understand how two addition facts correspond to two subtraction facts
What You'll Practice
1
Completing fact families with missing addition or subtraction equations
2
Identifying which equation is missing from a three-equation fact family set
3
Working with numbers up to 100 in related addition and subtraction facts
Why This Matters
Understanding fact families strengthens your mental math skills and helps you see the connection between addition and subtraction. This relationship is essential for solving equations, checking your work, and building number sense that you'll use in everyday situations like budgeting and problem-solving.
This Unit Includes
Practice exercises
Skills
Fact Families
Subtraction
Addition
Inverse Operations
Number Relationships
Mental Math
