Operations with Whole Numbers
The four operations — addition, subtraction, multiplication, and division — work together. Understanding their relationship helps solve all types of problems.
What You Need to Know
Key Concept Diagram
Addition and subtraction are inverse (opposite) operations
Multiplication and division are inverse operations
The order of operations: multiplication/division before addition/subtraction
Fact families show how the four operations are related, e.g. 3×4=12, 12÷4=3
Key Vocabulary
Inverse operation
An operation that reverses another, such as addition and subtraction
Fact family
A set of related number facts using the same numbers
Operation
A mathematical process: addition, subtraction, multiplication, or division
Order of operations
The agreed rules for which calculations to do first
Knowledge Check
Select the correct answer for each question. Click "Check Answer" to see if you are right.
Question 1
Which number sentence is in the same fact family as 6 × 8 = 48?
Question 2
3 × 4 + 5 = ?
Question 3
Which is the inverse of multiplication?
Key Concepts Summary
- ●Addition and subtraction are inverse (opposite) operations
- ●Multiplication and division are inverse operations
- ●The order of operations: multiplication/division before addition/subtraction
- ●Fact families show how the four operations are related, e.g. 3×4=12, 12÷4=3