Mathematics is not a normal thought@It was thought out by a handsome old man who respects children and is a child-centered person!!!!!!!!!! ! ! ! ! ! ! ! So many things to fill in???????
To the lady who reviews talents! ! ! ! ! ! ! I realized that there are some happy villages when it is almost finished! ! ! ! ! ! !
Idea: How to solve the problem easily????????? ? ? ? ? ? ?