Callista wrote:
Pretty common.
But make sure not to mistake anything else as dyscalculia. Problems with executive function or memory can show up as dyscalculia when in reality the numbers have little to do with it.
I know this because I had what seemed to be problems with math during my first few years at school--I couldn't memorize addition, subtraction, multiplication, and division facts. But it had nothing to do with numbers; it had everything to do with trying to memorize contextless information that had no connections to the other things I learned. It wasn't until high school, when I learned that things like 8x6 were a special case of "xy", that I was able to memorize the multiplication tables--and even then, I still picture them as geometric shapes rather than written numbers.
I know I don't have dyscalculia; the Linear Systems book sitting open on my desk says that much. (Linear systems is a branch of differential equations very useful to engineers.)
I have similar problems with memorizing names and dates in history class, and memorizing the parts of the body in anatomy class. Thankfully many of the body parts are Latin names that have meanings connected to the function, location, or appearance of the relevant structure; so anatomy was much easier than the times tables.
I can relate to this post the most. Although its mostly with numbers, I have extreme difficulty remembering anything I can't picture in my mind. I'm almost 30 and still can't remember all of the multiplication table, but I've learned tricks of figuring it out in my head in a way that I can understand, though it makes little sense to everyone else I explain it to. Same goes for small details in stories, or when asked to quote a conversation or movie. I remember the general idea behind it, I just can't repeat anything verbatim. I also noticed that when writing down numbers in any situation, I often write different ones than the ones I intend to write, i.e.: if I have to write down 526 I will write 265, or 926 or something like that instead. I usually have to double and triple check when I have to write things down for work just to make sure I wrote the right ones down.