Teachers should teach students to correctly understand the order of fractional addition and subtraction mixed operations and correctly calculate fractional addition and subtraction mixed operations. The following is the arrangement teaching plan of the first volume of fifth grade mathematics on Sunday, hoping to provide you with reference and reference.

The arrangement of the first volume of the fifth grade mathematics on Sunday.

Teaching objectives:

1, create a situation to further understand the significance of score addition and subtraction.

2, understand the order of fractional addition and subtraction mixed operation.

3, can correctly calculate the fractional addition and subtraction mixed operation.

4. Cultivate students' ability to solve practical problems through cooperation and communication.

Teaching focus:

The order of fractional addition and subtraction mixed operations.

Teaching difficulties:

The order of fractional addition and subtraction mixed operations.

Teaching process:

First, create situations and introduce new lessons.

Teacher: Students, what are you doing at the weekend?

Health: Some go to the book mall to read, some watch TV, and some go to the park to play. ...

Teacher: There are many answers. The teacher investigated the students' activities on Sunday. Do you want to know what everyone is mainly doing?

Health: I really want to know.

Second, create an inquiry environment to explore the learning process

1, read the questions and feel the problems that need to be solved.

The teacher showed the topic (the scene arranged on Sunday)

Teacher: Please look at the pictures and find out the conditions.

Students: 3/8 students go out to play, 1/6 students participate in children's palace activities, and the rest stay at home. What percentage of students stay at home?

2. Guide thinking and explore how to list calculation formulas.

Teacher: Students, we have to calculate the percentage of students who stay at home in the class. How to list formulas? Now let's try it together.

Students think independently and explore themselves.

On the basis of independent thinking, group exchanges and cooperation.

Teacher: Who can tell us the results of your exploration?

Health:1-3/8-1/61-(3/8+1/6)1-1/6-3/8/kloc-0.

The whole class discussed and summarized the problem of total number 1, and made clear the arithmetic of the formula.

Teacher: We regard the number of students in the class as 1, and subtract a few scores from the total number to find the remaining scores. xKb 1。 Com

Exposed topic: In today's class, let's discuss the mixed operation of fractional addition and subtraction. (blackboard writing topic)

3. The process of independent query operation

Teacher: We have learned the calculation method of integer addition and subtraction before. Let's see how these topics are the same as those we have learned before. What is the difference?

Student: The formula is the same. There are additions and subtractions, but the numbers inside are different. It used to be an integer or a decimal, but now it is a fraction.

Teacher: Then can you choose one of the calculation methods you have learned before?

Students think and calculate independently and explore themselves.

On the basis of independent thinking, discuss group communication and cooperation.

Teacher: Would you please tell me something about your own calculation process?

grow

1-3/8- 1/6 = 5/8- 1/6 = 1 1/24

1-3/8- 1/6 = 24/24-9/24-4/24 = 15/24-4/24 = 1 1/24

1-3/8- 1/6 = 1-(9/24+4/24)= 24/24 – 13/24 = 1 1/24

1-(3/8+ 1/6) = 1- 13/24 = 1 1/24

……

Teacher: Just now, many students talked about their own calculation process. Through calculation, we can know that the mixed operation of fraction addition and subtraction must be calculated in brackets first, and those without brackets must be calculated from left to right in turn.

Students discuss further in groups and communicate with the whole class. Further clarify the method and algorithm of fractional addition and subtraction mixed operation.

Third, practice consolidation.

1, see chart calculation.

Ask students to practice 1 questions independently and communicate with the whole class. In the process of calculation, we should emphasize the operation order.

2. Apply what you have learned and solve practical problems.

Completing the second question on page 6 independently can guide students to draw, analyze and answer, and improve their ability to analyze questions.

3. Solve other problems flexibly. (depending on your student status)

Fourth, class summary.

What knowledge have we mastered through study today?

Verb (short for verb) homework

Question 3 on page 6 of the textbook.

The arrangement of the first volume of the fifth grade mathematics on Sunday.

[Teaching content] Sunday arrangement (68-70 pages)

[Teaching objectives]

1, to understand the order of fractional addition and subtraction mixed operations.

2, can correctly calculate the fractional addition and subtraction mixed operation.

[Teaching Emphasis and Difficulty] Knowing the order of fractional addition and subtraction mixed operations can correctly calculate fractional addition and subtraction mixed operations and understand the remainder problem in fractions.

[Teaching preparation] Investigation activities. '

[Teaching process]

First, check the import.

1, calculation. 3/8+ 1/2 5/6—3/4 1 1/ 12— 1/6

Q: What should I pay attention to when calculating fractional addition and subtraction?

2. introduction In this lesson, we will discuss the method of fractional addition and subtraction mixed operation.

Writing on the blackboard: Sunday arrangement.

Second, explore new knowledge.

1, launch the "Sunday Arrangement" survey. By arranging three forms of sundays, the question "how many students in the class stay at home?"

2. Discuss the formula. Let the students try the formula independently, and then guide the students to regard the whole class as "1" and calculate it into a total.

3. Discuss the specific operation process. You can divide it all first and then calculate it; You can subtract a part from "1" and then subtract another part from the rest; You can also calculate the sum of the two parts first, and then subtract "and" from "1".

4. Make a "try" topic.

5. Summarize.

Third, consolidate the practice.

1, questions 1, 2 and 3 in the textbook on practice.

Question 1, please complete the calculation yourself.

Question 2: Make a sketch before you answer.

Question 3. Fill in the form first and organize the students to discuss "Why do you take a mountain road? How much is the difference between the mountain road and the time you walk?" . It is suggested to make a sketch to help understand this topic.

2. Finish the "exercises" after class 4-7.

The arrangement of the first volume of the fifth grade mathematics on Sunday.

Teaching objectives:

? Understand the order of addition and subtraction of scores.

? Can correctly calculate the fractional addition and subtraction mixed operation.

? I will arrange my Sunday time.

Teaching process:

? lead into/introduce

Teacher: I want to count the activities of my classmates on Sunday with my classmates today. Who can tell me what you did on Sunday?

Health: I do my homework at home, I go to my uncle's house to play, and I help my mother wash clothes. ...

? New lesson

? Investigation and statistical activities

Teacher: Students, we can do all kinds of activities on Sunday. We learn to count. Let's count! Who wants to be a small statistician? (Find a few small statisticians)

Student: (Reporting) Eight students stayed at home, accounting for four eleven students in the class, and five students went out to play, accounting for three twenty-two students in the class.

? Teacher: There are some students left. How many points do these students account for in the class?

Student: Add these two parts together and subtract them from the class size.

Teacher: Can it be reduced according to the class size?

Health: No.

Teacher: So, with what?

Health: It can be subtracted from "1".

Teacher: Why use "1"?

Student: "1" in terms of class size.

Teacher: Why is the whole class "1"?

Student: Because we made a survey in the whole class, what percentage of the class did we find? Therefore, the class size is regarded as the unit "1".

Teacher: What about the formula?

Discuss and list the formulas.

Teacher: How to calculate?

Students work out the algorithm together and discuss their findings.

Teacher: From these two questions, we can see that there is a certain order in the mixed operation of fractional addition and subtraction. Who can tell us?

Health: In the order from beginning to end, the first number in brackets.

? Consolidation exercise

? End of extension

Teacher: When we count the students' Sunday arrangements, some students have very good Sunday arrangements. You should learn to arrange the schedule for Sunday. Please arrange your Sunday schedule with your classmates!

Health: Make a plan for Sunday time.