This activity was designed to have students analyze step by step work to identify common errors when solving matrix equations. There are 6 problems with errors such as lost negative signs, taking inverses of matrices with determinants that equal zero, not following the correct order of operations. The document is 8 pages in length. Pages 1-6 have 6-8 of each problem on the page. I cut these out an laminated them so I could set up center like rotations. Page 7 is all 6 problems on one individual student worksheet. Page 8 is the student answer recording sheet. Page 9 is the answer key.