1. Math teaching plan for the second grade of primary school
Teaching content: estimation
Teaching objectives:
1, so that students can master the estimation method of double digits.
2, can be combined with the specific situation of multiplication estimation, and explain the process of estimation. Teaching emphasis: master the teaching process of the estimation method of multiplying two digits by two digits;
First, review the old knowledge:
1. Take the following questions orally: 40×10 60× 20 30× 40 300× 70 200× 8012× 400 240× 2130× 3 30× 3/kloc-0.
2. Approximate the following numbers: 32, 18, 68, 72, 95, 35, 842. Choose a few numbers and tell me how to find the approximate number.
3. Estimation:198× 4 305× 6 485× 3182× 5. How do you estimate it?
Second, explore new knowledge:
1, ask questions:
(1) Example 2: Please observe carefully. What did you learn from the pictures?
(2) Summarize the information in the picture and describe it as a complete problem: there are 18 rows of seats in the Great Hall, with 22 seats in each row. There are 350 students coming to class. Can you sit down?
2. Explore estimation methods.
(1) Let students think and exchange solutions to problems. Derived formula: 18×2222× 18.
(2) Group discussion: How to estimate the number of people?
(3) The representatives of each group report the various estimation methods of this group to the whole class.
Method 1: 18≈20 22≈20 20×20=400.
Method 2: 18≈20 22×20=440.
Method 3: 22≈20 18×20=360.
(4) Comparison and evaluation.
3. Try to solve the problem.
(1) Ask students to solve problems by estimation. There is a book with 23 lines on one page and about 22 words in each line. How many words are there on a page?
(2) Organize communication. Let the students talk about the process and result of solving the problem. Let students taste the fun of learning in communication.
Third, practice.
1. Finish the exercise 14, question 7:
(1) is calculated by students themselves;
(2) collective modification, talk about the estimation method.
2. Exercise 14, Question 8:
(1) Students read the questions carefully and understand the requirements.
(2) "How many rows of 93 seedlings have been planted?" How many 93s are there in this land?
(3) Please list the formulas independently and make an estimate.
Fourth, summarize and let the students talk about the gains.
2. Math teaching plan for the second grade of primary school
1, observe the same object from different angles, experience different angles, see different objects, and initially understand the relationship between the part and the whole. 2. Help students to establish the concept of space by observing various objects.
Emphasis and difficulty in teaching
1, objects with different angles and shapes, and get a preliminary understanding of the relationship between part and whole.
2. Cultivate students' concept of space.
Teaching preparation:
The elephant toy model has a rectangular box, a cup and three abstract cups painted with different colors.
Students bring a small toy.
teaching process
First, the introduction of new courses.
Did you travel during the summer vacation? Tell me where you have been.
During the summer vacation, our three children, Mao Mao, Naughty and Qiqi, also went on a trip. They came to India. The most famous animal in India is the elephant. They also saw an elephant on this day. (Showing elephant toys)
Mao Mao said, "I saw a tail hanging on the door."
Naughty said, "I found an ear on a wall."
Qiqi said happily, "I saw a lovely elephant with two ears fanned by the wind and a long nose."
Why do the same elephant and three children see completely different pictures?
Answer: Because of the different angles of observation, they didn't see the whole elephant.
If you want to know an object comprehensively, you must observe it comprehensively and learn to observe it.
In this class, we observe objects together. (blackboard title: observing objects)
Second, explore new knowledge.
1 (showing a rectangular box) Now the teacher has a box in his hand. What shape is it?
Answer: cuboid
Look at this cuboid carefully. Is every face the same color? (Rotating a cuboid) What color is it?
(Blackboard: yellow, red, white, green, blue and black)
With a box in his hand, the teacher asked the children who were far away. How many colors can you see at once in your position?
Write the answers of several children on the blackboard and classify them according to the number of categories.
Why do some children see three colors, and some children see two or even only one?
A: The observation angle is different.
Then think about it carefully: how many colors can we see at most at a time?
Answer; three kinds
How can a child who sees only one color or two colors see three colors?
Answer: Turn the cuboid or change the viewing angle.
3. Now take out your toys and experience the fun of observation by yourself.
Requirements: in groups of four, observe the same toy from different angles, tell your partner which part of the toy you see, and think: are the parts seen from different angles the same?
(Teachers patrol to guide students to observe objects)
We have just observed our toys. Who can tell us what you see?
Ask questions to the team members. During the observation, did you turn your toy to observe? What do you find by turning the toy?
The teacher concluded, writing on the blackboard: different observation angles lead to different observation results (read together).
Game: Now let's play a little game, guess what it is, and discuss it freely for 30 seconds. What's your answer to these four pictures?
In fact, these four pictures are the same object. Some students may wonder, how can the same object have four different pictures? (Different perspectives)
Then put the four pictures together and think, what is the answer?
A: Cup.
Is it really a cup? (showing the cup) Let's see if it's a cup!
From what angle did you see the first photo? The second picture, the third picture and the fourth picture?
Third, practice consolidation (textbook 67 pages)
1, the military museum held a dinosaur exhibition, and Xiao Liang, Xiaoming and Xiaohong all came to see dinosaurs. Do you know who saw these pictures respectively? (The teacher visits and corrects collectively)
If you don't put the book on now, will you do the second question? Just try it.
Fourth, summary.
What do you gain by observing the cuboid, your own toys and guessing games?
3. Math teaching plan for the second grade of primary school
Teaching objective: 1. Through practice, students can master the calculation methods of two-digit and two-digit addition and subtraction, and can calculate two-digit and two-digit addition and subtraction correctly and skillfully.
2. Improve students' computing ability and testing ability, and cultivate students' analytical judgment ability.
Key points and difficulties:
Check leaks and fill gaps, feedback questions, and improve students' calculation proficiency and accuracy.
Teaching tools:
courseware
Teaching process:
First, review the introduction.
1、36+28+ 17=
65-25-2 1=
Tell me about your calculation method.
The mother monkey picked 52 peaches, and the little monkey took them home. How much is left after two shipments?
Second, explore new knowledge.
1, teaching example
Courseware shows the theme map.
2. Tell us what the picture tells us and what the question is, and then answer.
A, first count 25 people, how many people are there in the car.
B, calculate how many people there are now.
C, column comprehensive formula.
Are there any other algorithms?
3. Summary algorithm:
By the way, what should I do when doing addition and subtraction mixed operations?
Align with the same digit, counting from one digit; Add up to ten decimal places, and abdicate if it is not enough; Sometimes you can simply write it down.
Third, strengthen exercise.
1. Complete Exercise 3, Question 8 on page 2 1. Three hens took their children out to find something to eat. But the chickens of the three families are mixed together. Can you help the hen find her own child? Teachers patrol. Roll call report, modify the evaluation.
2. Complete Exercise 3 on page 22, Question 12. Teachers patrol. Roll call report, and explain the filling method.
3. Complete Exercise 3 on page 22, Question 13. What math problems do you think of after reading your watch? Communicate with the students in the group. Report by name. Choose two problems that you like to calculate. Students at the same table exchange checks and talk about calculation methods.
Fourth, summary.
What did you get from today's exercise?
4. Math teaching plan for the second grade of primary school
Teaching content: page 4, examples, 4 cases, pages 5 and 4, "Do something" and exercises 1, questions 3-5. Teaching objectives:
Knowledge and skills
(1) Know the unit "meter" and help students establish the concept of 1 meter.
(2) According to the actual length 1 cm and 1 m, it is understood as 1 m = 100 cm.
(3) Learn to measure long objects with 1 meter length unit.
Process and method
Through observation, inquiry and other learning activities, help students form a correct representation of rice and experience the progress rate between length units.
Emotional attitudes and values
By exploring the internal relationship between knowledge, we can perceive that mathematics comes from life and is used in life.
Teaching emphases and difficulties:
Key point: let students learn to measure the length of an object with a meter ruler.
Difficulty: Experience the actual length 1 m and form an impression.
Teaching methods:
Teaching methods: discussion and demonstration.
Learning style: independent inquiry and group discussion.
Teaching preparation:
Scale, rice scale, tape measure, rope, CAI courseware.
Teaching steps:
First, review the introduction.
(1) Question:
(1) What length unit can be used to measure small objects?
② Which finger is 1 cm wide?
(2) Introducing new courses
Ask two students to measure the length of the blackboard with a centimeter ruler and tell their feelings.
(very troublesome and tired)
Yes! We usually use meters to measure long objects or distances. Today we will learn rice.
(blackboard writing: knowing the amount of rice used)
Second, explore new knowledge.
(1) know "meter".
Guess how long 1 meter is, and draw by hand; Show the initial perceived length of the meter scale 1 m; Look at what objects around us are about 1 meter in length.
(2) Understand the relationship between centimeters and meters.
1cm How many 1cm are there?
(3) Rice consumption
Measure the length of the blackboard, the length of the classroom and the height of the students with a meter ruler.
Third, accumulate and use, expand and extend.
(1) judgment (cross-check)
① Pencil length 15m. ()
② The desk is 70 meters high. ()
③ Height of a tree 16 cm. ()
(2) Complete the exercise 1, questions 3-5.
Fourth, summary.
What did you learn in this class? What did you get?
5. Math teaching plan for the second grade of primary school
Teaching content: To enable students to further master the written calculation rules of addition and subtraction, and to be more skilled in addition and subtraction calculation, so as to improve their calculation ability.
Teaching process:
First, reveal the topic.
We have studied addition and subtraction within 10,000 yuan, and this class practices the calculation of addition and subtraction.
Second, the calculation exercise
1, oral calculation
(1) Show the exercise on the blackboard 14 Question 9. First name the students and say the numbers of each stroke, then name the students and calculate the numbers directly.
(2) Summary: Generally speaking, oral addition and subtraction should be added and subtracted with the same number of digits from the high position. When a digit adds up to ten, add 1 to the previous digit, or subtract 1 from the previous digit if it is not enough.
2. Written calculation
(1) Do the exercise 14, question 10, the first sub-topic, name one person to act, and write the rest in the textbook.
(2) Question: How to calculate vertical addition? How to calculate vertical subtraction? What are the same landlords in addition and subtraction? What is the difference?
(3) Do exercise 14 and two other small questions, 10.
(4) Do exercises 14, questions 1 1. Ask after you finish: how much will it be reduced after you abdicate? Ten, a hundred? So, is the number on the unit, tenth and hundredth of the subtraction pen difference regular? Why is the sum of the difference and the subtraction unit 10, and the sum of the tenth and hundredth units is 9?
(5) Who can tell us this law, and how much do the last few numbers get from 1000? Who can tell me how much 10 and 100 were reduced before?
(6) Students are unwilling. 13 is in their exercise book.
Third, application exercises
Do exercises 14, questions 14 and 15.
Fourth, class assignments:
Exercise 14 question 12.