"Dysnumeria" is not the same as "Dyscalculia"
"Dysnumeria" is an innate perceptual difficulty in recognizing & processing NUMBERS. For example, difficulty in reading/registering longish series of digits, such as unformatted phone numbers.
"Dyscalculia" is an innate difficulty in performing arithmetic and other abstract numeric CALCULATIONS.
Both are classified as learning disabilities, can persist throughout a person's lifetime, and sometimes are found in conjunction with ADHD at statistically significant levels.
Coping strategies for Dysnumeria include 'chunking' a series of digits into smaller, more palatable perceptual nuggets.
For example, a long string of digits -- say, 011496843726103 -- can become more manageable when formatted as a phone number... "011" for the direct dial command, "49" for the country code, then creating pairs or triplets for the remaining digits, often separated by spaces, dashes, parentheses or dots.
In the above example, a dysnumeric person might prefer to visually reformat the number as "011 49 (684) 372-6103" while verbally reciting the latter portion as "Sixty-eight, forty-three, seven twenty-six, one oh-three."
Coping strategies for Dyscalculia can include rote practice, mnemonics, and, of course, the off-loading of such tasks to electronic calculators and computers.
As 'learning disabilities,' the research and treatment of Dysnumeria and Dyscalculia has typically focused on children. However, the same perceptual challenges often persist into adulthood but become 'invisible' due to acquired (but imperfect) coping strategies. As with ADHD, an associated legacy of shame and anxiety may be carried to the grave.