一位教师在教学“8个苹果,每人吃2个。一共可以给几人吃?”时,让学生讨论怎样算。学生讨论了一会儿后,一位学生说:“这道题目用加法算?”“为什么?”“因为老师说,碰到‘一共’就用加法。”数学是活的而不是死的。数学是培养人思维的,人的思维应该是很灵活的,是多样的,而不是死板的、一成不变的。但是在现实中,有些 A teacher in the teaching of “8 apples, each eat two. A total of several people can eat?”, Let students discuss how to count. After the students discussed for a moment, a student said: “This question is calculated by adding? ” “Why?” "Because the teacher said, Not dead. Mathematics is to cultivate people’s thinking, people’s thinking should be very flexible, diverse, not rigid and immutable. But in reality, some