Scene 1: buying stationery
Xiaoming went to the stationery store and bought three pencils and two erasers. He ranks fifth in the team. Do you know how many people are in front of him?
This problem can be simulated by drawing pictures or using small cards. The teacher can use five cards or five small objects to represent the people in the queue, then ask the students to rank Xiao Ming's position in the queue according to the topic description, and finally count how many people are in front of Xiao Ming.
Scene 2: Queue in the playground
On the playground, a group of children are lining up to play games. The teacher arranged half the children on the right and the other half on the left. Now there are four children on the right and three children on the left. How many children do you need on the left to be as many as on the right?
This problem can be represented by numbers or small cards on the playground. The teacher can let the students put small cards by themselves, and then calculate how many children are needed on the left to be as many as on the right.
Scene 3: Fruit stalls line up
There are six children waiting in line to buy fruit in front of the fruit stand. Xiaoming stood at the last position in the line. How many children are there in front of the fruit stand?
This problem can be solved by asking students to count the number of children in line, and then find out where Xiaoming stands at the end of the line. This can help them understand the concept of station layout and deepen their counting ability.
Teaching methods:
Use graphics, cards or objects to simulate the queuing scene, so that students can intuitively understand the concept of queuing.
Guide students to operate the calculation by themselves, and improve their participation and interest in learning.
Often guide students to think and explore, ask questions for them to try to solve, and stimulate their thinking ability and logical thinking.
Combining with daily life scenes, students can combine what they have learned with real life, which is easier to understand and remember.
Through these situational application problems, first-year students can experience the concepts of standing and queuing through specific scenes, so as to better understand and apply this mathematical concept and cultivate their observation, logical thinking and mathematical ability.