Teaching content of the first-grade mathematics courseware "Application of addition and subtraction within 10"
Application of addition and subtraction within 10.
Teaching objectives
1. By observing the animation scene of "Beautiful Zoo", students can skillfully solve simple problems in life and enhance their awareness of mathematics application according to the significance and algorithm of addition and subtraction.
2. Let students learn to observe and ask questions from different angles in the process of personally participating in teaching activities, and can solve problems in different ways, thus initially cultivating students' thinking ability of seeking differences.
3. Make up stories, explore with your brain, further feel the fun of using mathematics, and cultivate students' desire for lifelong learning.
Teaching focus
Enable students to skillfully use addition and subtraction within 10 to solve simple problems in life based on a preliminary understanding of the meaning of addition and subtraction.
Teaching difficulties
Cultivate students' ability to connect with real life, create problem situations and explore and solve problems.
training/teaching aid
Dictation card, computer software, zoo pictures, tape recorder.
Preparation of learning tools
A drawing board, a ball and a set of pictures for each deskmate.
teaching process
First, import
1. Teacher: First of all, please review the addition and subtraction within 10 with the teacher.
(1) Requirements: Read the formula and speak correctly.
Display: 4+5 8-6 9-3 2+6 3+4
10-2 8-4 5+5 7-2 1+5
(2) If you want to count, please look at the following formula and clap your hands.
Microcomputer display in turn:
9-4 2+5 6-3 10-4 3+6
2+8 6-2 4+4 5-3 10-9
2. Teacher's lead: You have a good command of addition and subtraction within 10. So, what about your ability to solve problems with the mathematical knowledge we have learned? Let's have a game in this class.
Second, new funding.
Teacher's blackboard writing project "Applying Mathematics".
1. Teacher: Please go to the zoo with your teacher. I hope the students will observe carefully, then make up interesting stories and ask questions for your friends to answer.
(Microcomputer shows cartoons)
2. Teacher: What do you want to say to everyone after visiting the zoo?
Teacher: Let's talk about it in class. Please tell the story you made up.
(1) Health: Five monkeys ran out of Guo Hua, three jumped into the tree, and how many were there under the tree?
Teacher: How to solve this problem? How to form?
Student: To solve this problem, use subtraction. The formula is 5 minus 3 equals 2. (blackboard writing: 5-3=2)
(2) Health: The problem is "how many are there under the tree", so we should remove three from five, and the number under the tree is two. Five minus three equals two.
Teacher: Which classmate goes on?
Health: Today, we went to the zoo. I saw three naughty monkeys jumping on the tree and two playing on the ground. How many monkeys are there?
Teacher: He raised a new question. Who will solve it? (Talking to each other at the same table) Who wants to tell everyone?
Health: 3 plus 2 equals 5. (Teacher writes on the blackboard formula)
Teacher: Huh? Both students made up stories about monkeys. How to use addition instead of subtraction this time? (discuss at the same table)
Health: To solve the problem of how many monkeys there are in a * * *, it is necessary to combine three monkeys on the tree with two monkeys under the tree, so add them together.
(3) Health: There are five monkeys in the zoo. Two little monkeys are playing on the ground. How many of them are jumping on the tree?
Teacher: "How many jumped into the tree?" How to solve this problem?
Student: To solve this problem, we should also use subtraction. The formula is 5 minus 2 equals 3. (The teacher writes on the blackboard formula)
Teacher: I really don't understand. How to subtract "2" this time? (Discuss in groups of four)
Health: Because the question is "How many monkeys jumped into the tree", we have to remove two of the five monkeys on the ground and get three on the tree.
(4) Health: I saw four pandas first, and then three came from behind the tree. How many pandas are there?
Teacher: The deskmates tell each other how to solve this problem. (deskmate said, roll call to answer. The teacher writes on the blackboard. )
(5) Health: Six lovely white rabbits took part in the competition, and two escaped. How much more?
Teacher: Who will answer this question?
(Students answer, the teacher writes it on the blackboard)
Teacher: Who agrees with him? what do you think? Communicate at the same table.
Teacher: Can you make up other stories?
Health: Uncle Wang in the zoo has two little squirrels, 1 rhubarb dog. How many animals does Yi * * have?
Teacher: What did you say together?
(Students answer, the teacher writes it on the blackboard)
Teacher: Visiting the zoo today is really rewarding. All right, we're done here. Please have a rest and watch the racket ball show together.
Third, have a rest in class.
Play ball with music.
Teacher: Students, I want to ask you to help the teacher solve a problem, ok? Who knows how to count how many people clap the ball? Please write it on the homework paper.
Teacher: Who can tell me what you think and how to calculate it?
(simple answer)
Teacher: Thank you very much, class. You can think of so many good ways to help teachers solve this problem. You are really good thinking children.
Fourth, the issue of openness.
1. Teacher: Please prepare your school tools. Students, there are different pictures on every table. These pictures are very common in our life. Please think about it, what things are related to them in daily life? Then put a problematic picture like this on the drawing board, then make up stories and ask questions according to the picture, and finally come up with your own solutions, okay? See which deskmate works well together. Let's go!
2. Work together at the same table, make up pictures, make up stories, ask questions and tell how to solve problems.
3. Group communication (teacher patrol).
4. Which deskmate do you think has a good picture and an interesting story? Ask them to communicate with you. (After the students are nominated, show the pictures in turn and communicate)
The video is the picture above.
Student: Students bought 10 schoolbags with pocket money and gave them to 8 mountain children. How much is left?
Teacher: The deskmates tell each other how to solve this problem. (omitted below)
Verb (abbreviation of verb) class summary
Today, everyone did a good job. What new skills have you learned through this course? Is there a problem?
There are many problems in life that need to be solved by mathematical methods. I hope every student can learn math well.