I saw a puzzling math problem tonight. The topic is: 37 students want to cross the river. There is an empty boat at the ferry that can only take five people. How many times must they cross the river with this boat at least? Careless people often ignore the "empty boat", that is, forget to have a gondola, so they can only take four people at a time.
In this way, 37 people subtract one rowing classmate, leaving 36 students, 36 divided by 4 equals 9, and the classmate who worked as a boatman on the other side for the last time also landed 4, so it takes at least 9 trips.
Coding math diary is more interesting than ordinary daily diaries, which can open children's minds. Mathematics is a part of life. Without it, it would be a stagnant pool. Mathematics without life is mathematics without charm. Math diary closely linked life with mathematics, making students curious about things related to mathematics around them, making students willing to contact information about mathematics, and cultivating students' interest in mathematics in class.