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Which is the related subtraction fact for 5 – 1 = 4?

5 – 4 = 1
6 – 5 = 1
4 – 1 = 3
6 – 1 = 5
First-grade skills Show expanded view
Counting and number patterns
Addition
Addition - skill builders
Subtraction
Subtraction - skill builders
Mixed operations
Comparing
Estimating
Fractions
Geometry
Spatial sense
Data and graphs
Measurement
Money
Patterns
Probability and statistics
Sorting, ordering, and classifying
Time