For example, in primary school students' math speech, first ask someone a question, then talk about how to solve it, and finally summarize it. Beg, beg, beg, beg, beg
Example: Xiaoming and Xiao Wang are 23 years old. Three years ago, Xiao Ming was four years older than Xiao Wang. How old are Xiaoming and Xiao Wang?
Answer: Xiao Ming was four years older than Wang Xiao three years ago, and it is the same now.
Xiao Ming: (23+3)/2= 13 years old Xiao Wang 13-4=9 years old.
A: ...........
Summary: .........