Teaching plan for large class mathematics activities: add 1 to the teaching goal of1.
1, through hands-on operation, cooperation and communication, initially understand the meaning of adding numbers within 10. Master the calculation method of continuous addition.
2, can systematically express the process of thinking and solving problems.
Important and difficult
Children contact the actual situation, experience the meaning of addition and understand the operation order.
Children understand the formulas that list pictures and meanings.
Activities prepare PPT courseware, operation exercises, pens and erasers.
teaching process
First review the number addition within 10, and PPT shows the formula "Do you remember, little friend?" 》。
Teachers and children can answer formula answers together, and can do single questions.
Second, scene import.
PPT presentation: Look who this is, little friend. What are they doing?
Teacher: It's been a long time since the new semester started, and these lambs in Yangcun are actively preparing for the spring outing! Don't you think Pleasant Goat is planning a spring outing? Let's follow Pleasant Goat's team and see what they have done.
Second, actively explore and understand 1. Play PPT: Did we find it? Pleasant goat picks pumpkins for the first time. How many pumpkins did they pick? How many pumpkins did the staff here bring?
2, children explore calculation, the teacher shows the calculation method 4+2+ 1=?
3. The teacher talks about the calculation method and works out the answer.
An expression like this with more than one plus sign is called continuous addition. Concatenation first calculates how much the first two numbers add, and then continues to add with the following numbers with this added number.
The teacher asked the children to work out the answers, showed the answers and praised the children who calculated correctly.
4. Continue the PPT presentation. After picking pumpkins, they are preparing to continue playing. What did they find? There is a child feeding the chicken!
Teacher: There are five chickens in the grass. Here come 1, and here come two more. How many chickens are there now?
The teacher continued to show the calculation method of 5+ 1+2=8 in PPT.
Everyone is very tired. They have been to many places. When they were ready to go home, Meiyangyang shouted, "Look, bird!" " Teacher: How many birds do you see in the tree? Three birds flew in, and three others flew behind. How many birds are there now? How do we calculate the formula? Animation together, right?
4+3+3= 10 animation playback calculation process.
Third, the children's operation teacher: The village chief said that the smartest thing in the village is Pleasant Goat, so let the children practice by themselves and see if you can calculate the addition like Pleasant Goat.
Practice writing formulas according to the pictures and calculate them correctly.
1, figure column calculation; 2, see if you remember-review the addition of numbers within 10; 3. Calculate the number of trains-write the numbers directly; 4. Help animals find their homes-connect questions.
In summary, the village head of Yangcun told the teacher that our children are as smart and lovely as Pleasant Goat. Children, today you learned how to add numbers below 10. Remember to go home and ask your parents if they are happy sheep? Or a lazy sheep?
Teaching plan for large class mathematics activities: add 2 targets within 10;
1. On the basis of mastering the addition within 10, learn the design method and operation order of continuous addition within 10.
2. Be able to look at the picture and express the meaning clearly in four sentences. And can calculate correctly and skillfully.
3. Like to calculate and experience the joy of success.
4. Know that sorting according to different characteristics of things will have different results, and initially understand the reversibility of sorting.
5. Develop children's observation and spatial imagination.
Prepare:
PPT magnetic teaching aid
Key points:
Master the operation sequence and calculation method of continuous addition.
Difficulties:
Look at the picture and express your meaning
Process:
Review: oral calculation: 1+3, 4+2, 3+4, 7+2, 2+2, 4+3, 3+3, 6+3.
Second, learn new content.
(1) Drawing leads to a new lesson.
Who can look at this picture and say what it means?
Health: left 1 flower, right 3 flowers.
At this time, the teacher should guide the students to answer completely in three sentences. Namely: say the number of two parts, ask a question and find the total. )
What method is used to calculate and why? How to form?
Blackboard: 1+3 = 4
Not bad: 3+ 1 = 4.
Q: What quantities do 1 and 3 stand for respectively?
Objective: To make children understand the relationship among three quantities. By reviewing old knowledge, we can pave the way for further study.
(B) reveal the new lesson
1. Plot
The teacher guided the children to observe. What's the difference between this picture and the one just reviewed?
Ask questions:
How many parts does this painting consist of?
[2] Who can explain the meaning of this picture in four sentences?
Health: One flower on the left, three flowers in the middle and two flowers on the right. How many flowers are there in a * * *?
Ask 2 ~ 3 students to express their ideas.
(The child looks at the picture and says that the teacher checks whether the child's expression is complete, and the teacher should praise the child who speaks well. )
Teacher: How many flowers does a * * * need? What method is used to calculate and why?
Student: It is calculated by addition, because the three parts add up to the total.
The teacher stressed that the three parts should be combined and calculated by addition.
4. How to form it?
1+3+2
Q: What else can I do?
At this time, the teacher inspired the children to think positively, and the teacher wrote the different formulas spoken by the children on the blackboard.
3+ 1+2 3+2+ 1 1+2+3 2+ 1+3 2+3+ 1
Ask the children to observe.
Q: [1] How many addends do each of these questions have?
[2] What quantities do these three addends represent?
[3] How many parts does the description consist of?
Through the guidance of the teacher and the observation of the child, the child initially feels that continuous addition is a combination of three parts.
5. Let the children observe it again.
Q: How many plus signs does it take to add three addends?
Health: Three addends add up to two plus signs.
The teacher summed up: any formula that contains two or more and only one plus sign is called the continuous addition formula.
(3) The method of publishing the reading and calculating questions.
The new knowledge we are going to learn today is the addition formula of three numbers.
Teacher:
1. How to read the formula of continuous addition?
The old teacher reads and the students listen and write. )
The first line: 1+3+2 is pronounced as 1 plus 3 plus 2.
Track 2: 1+2+3 is pronounced as 1 plus 2 plus 3.
The following questions are read by students in turn.
2. How to calculate the continuous addition formula?
The teacher tells the calculation process:
[1] Continuous addition is calculated in two steps: first add the first two addends (draw while talking), and then add the numbers used with the third addend. The teacher will fully explain the calculation process of this formula.
[2] Q: Who can explain the calculation process mentioned by the teacher?
Teachers can check whether children are listening carefully. )
[3] Let the children say the calculation process of several questions in turn.
(The teacher focuses on whether the order of children's questioning is correct. )
3. Summarize the order of addition:
[1] Let the children first sum up the order of continuous addition according to the calculation questions on the blackboard.
[2] The teacher summed it up again: find the sum of three numbers and calculate it by addition. When calculating, first add the first two numbers in sequence, and then add the third number. It can also be memorized according to the operation sequence summarized by the students themselves.
This is the basic sequence of serial addition. After studying additive commutative law, you will know that there can be other orders.
Through teaching, let children know that the addition of three numbers is called continuous addition, and continuous addition should be calculated in order. )
(4) Consolidation exercises:
1. Show me the magnetic teaching aid.
Through the practice of this picture, students can further master the formula of continuous addition and the order of operation. )
Steps:
Please observe the teaching AIDS first.
[2] The two expressed their intentions to each other in four sentences.
[3] Give children names and let them express their ideas.
[4] Tell me how to calculate.
[5] Ask children to list the formulas on the blackboard: (Children can list the formulas in the order of pictures. )
3+4+2
4+3+2
3+2+4
2+3+4
2+4+3
4+2+3
[6] collective check right and wrong
2. Show the activity card, explain the calculation process, and check the children's mastery.
3+ 1+5=9 3+3+ 1=7
2+2+4=8 2+ 1+2=5