As a diligent educator, I often need to write lecture notes, which can better organize teaching activities. So what is an excellent lecture? The following is the draft of the lecture on mathematical addition in primary schools that I collected for you, hoping to help you.
Additional lecture notes on primary school mathematics within ten thousand years 1 teaching material analysis.
Dear Judge Teacher: Good morning! The content of the lesson I am talking about today is Unit 2, Addition within 10,000 (II), the first volume of the third grade of primary school mathematics published by People's Education Press. This unit is based on the second volume of Senior Two, Addition and subtraction within 10,000 (I), which is the basis for students to learn multi-digit addition in the future.
According to the cognitive level of students in this grade and the analysis of teaching materials, I have determined the teaching objectives of this course as follows:
1, so that students can master the law of continuous carry addition within 10 thousand, and can correctly calculate continuous carry addition within 10 thousand.
2. Enhance students' awareness of estimation and cultivate students' sense of numbers.
3. Guide students to make full use of knowledge transfer to analogize new knowledge and cultivate students' transfer thinking.
Teaching emphases and difficulties
Emphasis: able to write and calculate three-digit continuous carry addition.
Difficulty: master the law of continuous carry addition within 10 thousand.
Design concept:
(A) scenario introduction, ask questions
In this link, I created a scene of "donating one day for charity" in the affiliated elementary school. Display the donation statistics of each class.
Category 30 1 302 303 304
Donation 129 yuan, 78 yuan, 85 yuan and 96 yuan.
Ask the students some math problems calculated by addition based on this information. (Write all the students' questions on the blackboard in turn)
I chose the charity one-day donation that students are familiar with and asked familiar questions from the situation. On the one hand, it effectively stimulates students' desire for calculation, and at the same time, it also makes them experience the practical significance of learning to calculate. Learn to observe things and think about problems from a familiar angle, and stimulate students' interest in mathematics. Use "one-day charity donation" to cultivate students' good quality of being good at helping others.
(2) Discuss communication and solve problems.
How much did 1.30 1 class and 302 * * * class donate? (Think independently first, communicate in groups before solving)
Ac feedback
Then ask the students to focus on what you want to remind everyone when calculating such problems. (Which number adds up to ten, go to the previous digit and enter 1, plus the number on the previous digit, remember to add up to 1. ) to break through the focus of this lesson.
In this design, I use migration to let students master new knowledge. Because students have basically mastered the calculation rules of addition before, on this basis, I learn new content by trying, discussing and comparing. Only in this way can we give full play to the effectiveness of knowledge transfer and reflect students' autonomy in learning.
How much did Class 2.303 and Class 304 donate?
Let the students estimate first and then calculate.
Feedback: Focus on solving the original problem that 1 is added in hundreds, and 1 is 2.
B. If the donation of Class 303 becomes 196 yuan, how to solve this problem (estimate first and then calculate)?
Students summarize the matters needing attention when doing the problem.
After students understand the calculation rules of continuous carry, they need to consolidate and internalize it through practice, so students are asked to calculate 96+ 129 and 196+ 129, and students calculate the three-digit addition according to the rules. Then let the students summarize the main points of three-digit addition, consolidate the law of carry addition and master new knowledge. In addition, the standard also proposes to strengthen estimation, and I also pay attention to the cultivation of students' estimation ability when calculating.
(3) Consolidate application and improve internalization.
1, students solve the remaining problems, one person in a row, two people write, the last person says how he calculates, and then switch roles in turn.
2. Exercise 4, Question 4
Let students play different roles in the practice, and make the boring calculation practice concrete, interesting, hierarchical and targeted, thus improving students' interest in learning. It avoids the programmed training of words and improves the group and effectiveness of cooperative inquiry.
(4) Review, reflect and improve.
Let the students talk about the experience of this class.
While reviewing knowledge, reviewing and sorting out emotional attitudes will help students deepen their understanding of teaching priorities in a short time and promote the comprehensive realization of teaching objectives.
Let me talk about my blackboard writing design: first, it is conducive to guiding students to observe and summarize abstractly; Second, the blackboard design and teaching ideas are harmonious and unified, which can present the knowledge points of this lesson concisely and prominently, and it seems clear at a glance.
The goal of supplementing lecture 2 in primary school mathematics within ten thousand years;
1, so that students can put forward mathematical problems and choose appropriate algorithms according to the situation.
2. Cultivate students' awareness of estimation, estimate according to the specific situation, judge whether the calculation result is right or wrong, and explain the rationality of the result.
3. Cultivate students' ability to ask questions and solve practical problems according to specific conditions.
Straight to the point:
Master the estimation method and make the correct estimation correctly.
Say difficulty:
Be able to estimate according to the specific situation, and explain the rationality of the estimation results.
Say process
First, create a scene.
Students, do you know that mineral water bottles can be recycled? Mineral water bottles are plastic and can be recycled in the morning. Let's take a look at the recycling of mineral water bottles in Class One, Grade Two for one month. Show me the theme map.
Mineral water bottle collection
The first week 180
The second week 340
The third week 192
2 19 the fourth week
Second, independent inquiry.
1. Find information and ask questions.
Let students observe the theme map, ask mathematical questions and predict their own learning situation;
How many mineral water bottles were collected in the first week and the second Monday?
How many mineral water bottles are collected in the fourth week than in the third week?
How many mineral water bottles are collected in the third and fourth weeks?
…………
We haven't had any problems before. Let's solve it now.
2. Solve problems and cultivate estimation ability.
How much do you charge for the third and fourth weeks?
How to form?
Blackboard: 192+2 19=
No, what is the estimate?
Discuss in groups, communicate again and report your own estimation methods.
① 192 is close to 190, 2 19 is close to 220, 190+220=4 10.
② 192 is close to 200, 2 19 is close to 200, and 200+200=400.
③ 192 is close to 190, 2 19 is close to 200, 190+200=390.
Teachers should affirm every estimation method and guide students to observe, analyze and master the general.
Estimation method:
In the estimation, the third book can be regarded as a close integer or an integer.
Question: If you don't collect 500 pieces and send them once, how many pieces can you collect and send them once? Discuss and communicate, and report the results.
①500-4 10=90
②500-400= 100
③500-390= 1 10
3. What other questions can you ask? Teamwork and exchange reports.
What do you think of collecting so many mineral water bottles in a month? Guide students to discuss.
On timely environmental education.
Third, application expansion.
1, estimate, even a company.
Complete Exercise 20, Question 5.
2. estimate.
583+4 17= 7 19+ 179
63 1-409= 529-247=
Step 3 solve the problem.
① Beijing to Dalian, air ticket to 620 yuan, train ticket 147 yuan. How much is it cheaper to take a train than to fly?
(2) A book has 37 pages. After reading 142 pages, how many pages are left unread?
③ The electric fan is 245 yuan, the rice cooker 187 yuan, and mother 400 yuan. Is that enough?
4. Open questions
Investigate your family income: Dad's monthly income is () yuan, and Mom's monthly income is () yuan.
Monthly household expenses. Save money.
10000 elementary school mathematics three-point addition lecture notes requirements:
1, through learning, let students calculate three digits plus or minus three digits.
2. Enable students to add and subtract estimates in combination with specific conditions, further understand the basic methods of adding and subtracting estimates, and enhance the awareness of estimation.
2. Understand the significance of checking calculation and checking addition and subtraction, and initially form the habit of checking and checking.
3. Let students experience the process of communicating with others by their own algorithms, and learn to cooperate with others.
Straight to the point:
1, three digits plus or minus three digits.
2, master the calculation method.
Say difficulty:
1, continuous carry addition.
2. Successive abdication subtraction.
Say advice:
1. Use transfer method to teach the calculation of addition and subtraction, so that students can master what they have learned.
2. Let students solve practical problems to learn calculation.
3. Pay attention to strengthening estimation and cultivate students' estimation consciousness and ability.
4. Appropriate and timely use of cooperative learning.
Class arrangement:
1, addition ... addition ... addition.
2. Subtract 3 class hours.
3. Calculation of addition and subtraction .......................................................................................................................................................................
4. Classification and viewing .........................................................................................................................................................................
;