which dataset belongs to each lab

[jdelgadoblanco]

I finished the first lab about adding vectors and they were correct for all the datasets. But I don't understand how the different labs uses the same datasets for different operations. Now I am working on the matrix multiplications and I can figure out where the correspondent datasets are. I downloaded it from the site and I validate all of them for the vector add but I still don't understand which dataset to use for the second exercise since they work for vector adding they shouldn't work for matrix multiplication, right?