One method: when "at most" and "at least" appear in the title, this is the key that we should grasp. When solving the problems of "renting a car, renting a car and loading a car", if there is a remainder in the calculation result, the final result should be "one method", that is, quotient plus one.

Truncation method: there is the word "seeking the most" in the title, and "seeking the most" often appears in solving problems such as shopping, cutting clothes and rope. If the calculation result of this problem has a remainder, just look at the business. Discard the remainder, remove the discarded part, and keep the number unchanged, which is called truncation method.