(1) Read and write hundreds, hundreds, hundreds, and thousands.

(2) The composition of numbers Teaching objectives:

1, learn to read and write numbers within 1000 with the help of a counter. Understand the meaning of numbers on different numbers and master the composition of numbers.

2. Let students try to read and write by transferring reading and writing methods in 100 to cultivate students' autonomous learning ability.

3. Contact with practice, feel the simplicity of mathematical writing and the necessity of reading, and apply it to practice.

Teaching emphasis: learn to read and write numbers within 1000 with the help of counters. Understand the meaning of numbers on different numbers and master the composition of numbers.

Teaching difficulties: preparation of correct reading and writing AIDS with zeros in the middle or at the end; preparation of courseware and counter learning tools; counter teaching process;

First, review the introduction and discuss the theme.

1, Teacher: Review the numerical sequence table. Health: the first place is one, the second place is ten, the third place is hundred, and the fourth place is thousand.

2. Teacher: (Review the reading and writing of numbers within 100) What is the number on the counter? How many digits? What is the highest position? ) (Courseware presentation counter 57) Student 1: 57. Ten digits is five, one digit is seven, and the pronunciation is fifty-seven.

Student 2: Double digits. The highest level is ten.

Courseware counter 50 Teacher: What are the numbers on the screen? What is it made of? How many digits? What is the highest position? Health: 50. Write 0 in one place and 5 in ten places. Read 50. The highest level is ten.

Teacher: 0 Can you not write? Why?

Health: No, there is no place to add 0 in the unit.

3. Teacher: These are the reading and writing within 100 that we have learned before. Today, let's read the numbers within 1000. (blackboard writing; 1000 read and write)

Second, cooperative learning, exploring new knowledge

1, reserved by the teacher 126.

(1) Teacher: How much is this? Please read it. Student: 126 (students are free to try reading). Teacher: How many digits is this? Who is its highest number? How to write? How to pronounce this number?

(3) Health: double digits. The highest digit is 100, the unit digit is 6, the digit is 2, and the digit is 1. Writing: 126, reading: 126, courseware demonstration.

(4) Teacher's summary: One bead on 100 before this number represents one hundred, so write 1 on hundred, two beads on ten represent two tens, so write 2 on ten, and six beads on one represent six 1, so write 6 on one. This number is written: 126. Student books.

2. The teacher dialed 304. Let the students discuss how to read. How to write?

(1) Health: the number of units is 4, 10 is 0 and 100 is 3. Writing: 304, Pronunciation: 304 (2) Teacher: There is not a bead on the ten people here. What does this mean? Student: No ten means zero.

(3) blackboard writing: reading: 304 writing: 3043, courseware display counter 580 (1) requires the whole class to write this number in practice. (Courseware demonstration) Ask students to check. Health: Write 5 for one hundred digits, 8 for ten digits and 0 for one digit. Writing: 580.

Teacher: Tell me what this 5 means and what 8 means. How many digits is this? What's the highest number? Health: Three digits, with the highest digit of 100.

The teacher emphasized that 0 need not be read.

4. courseware distribution 1000 division: ask students to think about how to write, how to read and what it is made of.

Student: 1000, pronounced as 1005. Teacher's guidance summary: reading and writing should start from a high position, with "0" at the middle and end. Read the 0 in the middle, not the 0 at the end. Read all the students.

Third, internalize new knowledge and consolidate and improve it.

1. Courseware shows the price of vacuum refrigerator. Teacher: Read each other at the same table and talk about what it is made of.

Health: 203. Two hundred and three.

2.P69 "doing" questions 1 and 2.

Teacher: Talk to your deskmate before you answer.

Teacher: How is 330 pronounced? What is it made of?

Health 1: 330 pronunciation: 330. Three hundreds and three tens.

Teacher: What does 950 write? What is it made of?

Health 2: Writing 950 consists of 9 hundreds and 5 tens.

P7 1 "Exercise 15", question 1, 2, 3.

(1) Teacher: Talking about protecting the environment from battery recycling.

(2) Teacher: How much is it? What is it made of?

Health: 630, which consists of six hundreds and three tens.

The teacher draws beads on the counter and the students read the numbers. Please write down some readings and correct them in the same form in time.

(1) The screen shows 600 students: draw 6 beads on the hundreds.

(2) The screen shows 530 students: draw 5 beads on 100 students and 3 beads on 10 students.

(3) Screen display 1000 Student: Draw 1 beads on a thousand trees.

(4) Talk about the price of washing machines. (Students' reading questions) 4. Consolidate and improve, complete the courseware fill-in-the-blank questions.

(1) One thousand has () a hundred.

Health: 10 Hundred (2)940 consists of () Hundred and () Ten.

Health: nine hundred and forty. (Students read together) (3) The number of 409 is ().

Health: 4095. Pinball game. The teacher points to the students and writes it out. )

Fourth, expand and improve the mathematical thinking ability.

1. The courseware shows the numbers. Students think, write the numbers and answer.

Teacher: Why is it 3 18?

2. Courseware demonstration topic: Write two numbers in front of 800 and two numbers in the back, so as to form a regular sequence. Students write the series according to their own methods, and the whole class shows different methods.

Class summary: read and write from the high position, add "0" in the middle and end, read the middle 0 when reading, and don't read the end 0.