Which disorder is characterized by malformed or abnormally written large number symbols?

The disorder characterized by malformed or abnormally written large number symbols is dyscalculia. This specific learning disability affects a person’s ability to understand numbers and learn math facts. Individuals with dyscalculia often struggle with number sense, mathematical reasoning, and calculation skills, including the proper formation of number symbols. Miswriting numbers or formatting them incorrectly is a common symptom of this condition.

Dysgraphia, on the other hand, refers to difficulties with handwriting and expression in written language, which does not specifically pertain to numerical symbols. ADHD, or Attention Deficit Hyperactivity Disorder, involves issues related to inattention, hyperactivity, and impulsivity, and does not specifically address the formation of numeric symbols. Dysnomia is associated with difficulty in recalling words, names, or symbols, which is distinct from the challenges presented in dyscalculia.

Thus, dyscalculia is the correct answer, as it directly pertains to the difficulties with numerical representation and form that are being described.