Final answer:
The question involves selecting the correct expression that represents operations with numbers in different numerical bases. To answer accurately, one needs to understand base conversion and arithmetic in various bases, which is a part of mathematics typically covered in high school.
Step-by-step explanation:
The subject of the question pertains to numerical bases and operations with numbers in these different bases. The question asks which of the provided expressions corresponds to actions described using different numerical bases. It is crucial to understand the use of bases in numerical systems and how to perform additions and subtractions within those systems. Each number and operation in the expressions is tagged with a subscript that represents its base. For example, 2004 is a number in base 4, whereas 2008 is in base 8.
To address this question correctly, one would typically first convert the numbers into a common base (usually base 10) before performing the operations. However, the provided excerpts from exercise sets and examples do not directly relate to base conversion or answer the query. Instead, they point to procedures involving scientific notation, significant figures, and the manipulation of expressions in various bases or contexts. Therefore, it is important to rely on knowledge of numerical bases that is not explicitly provided in the excerpts in order to determine the correct answer to the student's question.