The blame should be put squarely on the shoulders of tophatter.com. They know the quality of what is being sold and choose to look the other way for the sake of making commission and sales fees on these imitation goods. In my estimation and also the interpretation of the law this is outright FRAUD.
Inverse operations are opposite operations that undo each other. Addition and subtraction are inverse operations. Multiplication and division are inverse operations.
Inverse Operations. are two operations that have the opposite effect, such as addition and subtraction, or multiplication and division. For Inverse Operations we can form Fact Families. In the Fact Family of (2, 3, and 5) we can form two addition and two subtraction problems.