Inverse Operations
Lesson
Topic Index| Grade 4 Math | Elementary Test Prep | StudyZone

Inverse Operations 

are two operations that have the opposite effect, 
such as multiplication and division.

For Inverse Operations we can form 
Fact Families.

In the Fact Family of (3, 4, and 12)
we can form two multiplication
and two division problems.

3 x 4 = 12
4
x 3 = 12
12 3 = 4
12 4 = 3

Multiplication/Division 
Examples:

Fact Family of  (2, 3, 6)

2 x 3 = 6
3
x 2 = 6
6
2 = 3
6
3 = 2

Fact Family of  (4, 5, 20)

4 x 5 = 20
5
x 4 = 20
20
4 = 5
20
5 = 4

In Multiplication/Division Fact Families, 
the largest number in the "family" is 
*the total number you get when you Multiply,
and 
*the total number you Divide up (dividend).

Remember: Knowing how Fact Families are related
and work together helps you see the 'relation' between multiplying and dividing.

Let's Practice!
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Topic Index | Grade 4 Math | Elementary Test Prep | StudyZone

Created by Ed Fayette
Updated by
Nicole Freebern
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