Final answer:
To find the number of cards left in a 52-card deck after n cards are dealt, you use the algebraic expression 52 - n, representing subtraction of the dealt cards from the original number.
Step-by-step explanation:
The student is asking for an algebraic expression to represent the number of cards left in a full deck after n cards have been dealt. In mathematical terms, if a deck initially contains 52 cards, and you remove n cards from it, the expression to represent the number of cards remaining in the deck is 52 - n.
This expression is a direct result of the principle of subtraction which states that if you have a certain number of items and remove some, the number of items left is the difference between the two quantities.