Which clinical sign denotes a significant learning issue concerning number systems?

The identification of an inability to discriminate specific order characteristics of numbers is a significant indicator of learning issues related to number systems. This difficulty points to challenges in understanding fundamental concepts in mathematics, such as sequencing and relationships between numbers. This skill is essential for grasping more complex mathematical operations and building a solid foundation in numeracy.

In contrast, the other options highlight issues that might relate to different learning areas. For instance, difficulty summarizing texts pertains more to reading comprehension and language processing rather than numerical understanding. Similarly, problems with handwriting are typically linked to fine motor skills and can affect writing, but they do not directly relate to the comprehension of number systems. Difficulty understanding verbal instructions might indicate a broader issue with auditory processing or attention, but it also does not specifically denote a problem with numerical concepts. Therefore, the ability to discriminate order characteristics of numbers is uniquely relevant to the understanding of number systems and essential for a student dealing with mathematical learning issues.