Solution: (1) In application problems, many problems have already told you the calculation method, and you will feel it if you pay close attention to the solution. For example, this question: "How many parts does he make per minute on average" means: (number of parts) ÷ minutes (number of parts); "How many minutes does it take to make each part?" Just use: minutes.

(2) According to the meaning of the question: 5 ÷ 8 = 0.625 (pieces); 8 ÷ 5 = 1.6 (minutes)

He makes an average of 0.625 parts per minute. Each part takes 1.6 minutes.