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What fact is missing from this fact family?

8 + 4 = 12
4 + 8 = 12
12 – 8 = 4


Type the missing fact:  
Second-grade skills Show expanded view
Counting and number patterns
Comparing and ordering
Names of numbers
Patterns
Addition - one digit
Subtraction - one digit
Addition - two digits
Subtraction - two digits
Addition - three digits
Subtraction - three digits
Properties
Mixed operations
Place values
Estimation and rounding
Logical reasoning
Money
Time
Data and graphs
Measurement
Geometry
Fractions
Probability and statistics
Multiplication
Division