There are many math phenomena in the first grade in life. For example, one stick plus three sticks equals four sticks, a small square has three cookies, give Xiaoming two cookies, and there is one cookie left. There are eight peaches, which are divided equally among the four monkeys. Each monkey is divided into two peaches. The small tree is ten centimeters tall, and the big tree is twelve centimeters taller than the small tree. There are many examples in life, so I won't give them here.