mathematics disorder
in DSM–IV–TR, a learning disorder in which mathematical ability is substantially below what is expected given the person’s chronological age, education, and measured intelligence. It may involve (among other problems) difficulties in counting, learning multiplication tables, understanding mathematical problems and performing mathematical operations, reading numerical symbols, and copying numbers. In DSM–5, the disorder has been subsumed within a category labeled specific learning disorder and is no longer considered a distinct entity.