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今天,我在做数学作业时遇到一道难题:甲乙丙三个班一共有161人,甲班比乙班多2人,丙班比乙班少6人,乙班有多少人?刚一看就傻眼了,题目中只告诉了我三个班的总人数和三个班人数的关系,用三个班的总人数除以三个班除不了,我越想越糊涂了,于是求助妈妈。妈妈将题目读了一遍,问我:“你能画出线段图吗?”我恍然大悟:在题目所给的条件里,有关系就可以画线段图。这道题目的关系是甲班比乙班多2人,丙班比乙班少6人。这句话中没变的是乙班,那先画乙班的线段图,再根据这句话画出甲班和丙班的线段图。如下:
Today, I was in a math homework when I encountered a problem: A, B three classes a total of 161 people, A class B more than two people, C less than B class 6 people, B class how many people? Just look On the dumbfounded, the subject only told me the relationship between the total number of three classes and the number of three classes, divided by the total number of three classes divided by the three classes can not be divided, the more I think the more confused, so help my mother. Mom read the subject again and asked me: “Can you draw line drawings?” "I suddenly realized: in the conditions given in the title, the relationship can draw line drawings. The relationship between this topic is more than 2 class A class B, C class 6 less than class B. This sentence has not changed is the B class, then draw B line segment, and then according to this sentence to draw A and C class line map. as follows: