Excellent teaching plan of the first volume of fourth grade mathematics 1 teaching goal
1. By introducing the generation of numbers, let students establish the concept of natural numbers and understand some properties and characteristics of natural numbers.
2. Let students experience the generation process of numbers through activities such as exploration, thinking and summary.
3. Make students understand the great achievements of ancient mathematics in China and inspire national pride.
Emphasis and difficulty in teaching
1, focus: the history of the emergence and development of numbers.
2. Difficulties: the characteristics of Roman numerals.
teaching tool
Ppt courseware
teaching process
First, the dialogue is interesting and introduces the situation.
Students, today the teacher brought you a new friend. Do you know anyone? He is Bacon, a famous Italian Renaissance philosopher. Bacon once said a word. Today, the teacher gave it to you, "Reading history makes people wise, and mathematics makes people careful". Tell me how you understand it!
Second, show exchanges and explore new knowledge.
1. Introduce ancient people's initial understanding (more or less) of logarithm in life, production and labor.
2. Introduce three counting methods: physical counting, knot counting and trajectory counting.
3. Introduction symbols (numbers)
Introduce Babylonian numerals, China numerals and Roman numerals.
Compare the characteristics of each number, focus on introducing Roman numerals, and analyze the characteristics of Roman numerals.
4. Show the figures of each country and explain the necessity of unifying the figures.
5. Listen and introduce the origin of Arabic numerals.
6. Teach the concept of natural numbers.
Thinking:
How are these natural numbers arranged?
What is the difference between every two adjacent natural numbers?
What is the smallest natural number? Is there a maximum natural number?
Third, the class summary:
What have you gained from learning this lesson? Please share it with your classmates!
Fourth, homework:
1, reading 16, 17.
2. Write an article about the generation of numbers.
The teaching goal of excellent teaching plan 2 in the first volume of fourth grade mathematics;
1. Master the writing method of numbers within 100 million, and you can write numbers within 100 million correctly.
2. Cultivate students' ability to transfer analogy and obtain information.
3. Further cultivate the sense of numbers, carry out patriotic education with relevant data, and cultivate good writing habits.
Teaching focus:
1. Master the writing method of numbers within 100 million, and you can write numbers within 100 million correctly.
2. How to write a number with a middle and an end of 0?
Teaching aid preparation:
Counter, digital sequence table, digital card.
Teaching process:
First, import
1. Talk: In yesterday's math class, we learned about the population situation after the fifth population census in China and learned a lot of reading methods. Please read the numbers below.
56900 40080500 14590320
2. Q: You read quickly and accurately. Can you tell me how to read? (Student answers)
Please tell us the numerical order of numbers within 100 million and how to grade them. The teacher arranges the numerical order table according to the students' answers. )
Write down the following numbers and say how to write numbers within 10 thousand.
Seven, seventy, seven, zero, eight, one thousand, 532.
5. According to the students' answers, make clear how to write numbers within 10,000.
Second, explore new knowledge.
We have learned how to write numbers within 10,000, and today we are going to learn how to write numbers within 100 million. (blackboard title: how to write numbers within 100 million)
1. How to write an integer?
Display: 440,000,13.82 million, 6.78 million.
2. The student groups try to write these numbers, and then exchange writing methods.
3. According to the students' speeches, explain: To write an integer of 10,000 on the level of 10,000, write 441382,678 on the level of 10,000, and then write four zeros on each level.
4. Exercise: 50,000,60,80,96.72 million.
How to write ten thousand and two-level numbers?
Display:103,245
Q: How many levels does this figure have? What floor should I write the numbers on first, and then what floor?
The students try to write numbers. Draw a score line and ask the students to check whether the numbers written are correct. )
The teacher says numbers, and the students practice writing numbers.
Thirteen thousand two hundred and sixty-five, four million six hundred and thirty-seven thousand eight hundred and ninety-two,
179,300, 2,564,720,000
How to write numbers with zeros in the middle and at the end?
Q: How many levels is the number 320600? How to write ten thousand levels? What if there is no one at the next level?
The teacher wrote this number on the number table, and then asked the students to read it out and check it.
Students try to fill in 20.507 million on the numerical sequence table, and say how to write it again.
The student replied: Write 2050 at the level of 10,000 first, and then write 7000 at the level of 10,000, making a total of 20,507,000.
Students independently explore the following figures.
102,345, 320,600, 20,507.
Third, the class summary
What new gains have you gained from today's study? Who do you think is the best in the class today? Why?
Excellent teaching plan 3 in the first volume of fourth grade mathematics;
Practice of writing division of labor
Teaching objectives:
1. Be able to master the method of adjusting the initial quotient if it is too large or too small.
2. Be proficient in correct writing.
Teaching process:
First, basic exercises.
1. Fill it in first, and then calculate the divisor as dozens of trial quotients.
2. What is the largest number in the brackets below?
40( )