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Yes subtraction of vector obeys commutative law because in subtraction of vector we apply head to tail rule
Actually The cross product of two vector is a VECTOR product. The direction of a vector product is found by the right hand rule. Consider two vectorsA and B,AxB= CWhere C is the Cross product of A and B, and by right hand rule its direction is opposite to that of BxA that isBxA=-C
The Commutative Law of Multiplication
commutative law of multiplication a x b = b x a
Both union and intersection are commutative, as well as associative.