I've always struggled with anything math-related. I was in Special Ed. for speech and language as a child and have motor skills, sequence and processing issues. I kept failing my undergraduate remedial math class at my university. I self-referred to Disabled Student Services to see what was going on and was diagnosed with math LD. DVR bought me a particular calculator for students with learning disabilities or cognitive disabilities, to use in my remedial math class.
I did not learn to tell time or count money til high school and have never worn a watch. I count on my fingers many times.
I saw FF's problem and had no idea what it meant.