(2) After trying to write some numbers, students can be organized to discuss how to write two levels of numbers. The teacher focused on discussing opinions and summed up: write Level 1 first, then Level 10,000. Whoever doesn't have the previous unit will write 0 as a placeholder.
(3) In teaching, it can also be introduced from the integer of ten thousand, so that students can experience and understand the law of writing numbers.
4. Explanations of some exercises in Exercise 1 and teaching suggestions.
Question 1 ~ 5 is an exercise on how to read numbers within 100 million.
Question 1 Ask the students to make a numerical sequence table. By letting students try to make it themselves, they can deepen their understanding of digital sequences and several levels of division.
Question 2: Four groups of reading exercises are arranged, and each group is a comparison of two numbers. Through practice, let the students understand that the pronunciation of the same number is different at the level of 10 thousand and 10 thousand, which paves the way for later learning to rewrite large numbers into numbers with "10 thousand" as the unit.
Question 3 presents a situation: students in groups exchange different reading methods and explore more convenient reading methods, which shows that students can choose appropriate reading methods independently.
The fourth question presents three scenic maps of Beijing, so that students can read the numbers under the maps correctly, further deepen their understanding of the digital reading methods within 100 million and improve their reading ability.
Questions 6 ~ 9 are exercises on "How to write numbers within 100 million".
There is no numerical table to support the writing number of 7 questions, so students can write directly.
Question 8 presents a group of pictures about biology, geography, transportation, etc. Students write numbers. These materials are knowledgeable and contemporary.
Question 9 is to write numbers according to the composition of numbers and train students to understand the composition of numbers and write numbers correctly.
Question 10 ~ 16 is hundreds of millions of consolidation exercises in reading and writing.
10 presents a practical activity of reading and writing numbers, so that students can know large numbers in the activity. It can not only make students feel interesting, but also provide materials for teachers to organize cooperative learning.
Question 1 1 present a group of pictures for students to read and write numbers. The content of pictures can help students to understand relevant knowledge and broaden their horizons.
13 is a topic of investigating and collecting a large amount of information, which cultivates students' literacy of collecting mathematical information.
15 is a judgment question. Let the students judge whether it is reasonable through the four data presented, which not only understands the students' understanding level of knowledge, but also cultivates their sense of large numbers and trains their analytical judgment ability.
16 is a comprehensive exercise of reading and writing numbers, which is difficult, but the requirement of writing numbers is presented in the form of playing games, which is suitable for children's age characteristics.
I'm glad to answer the landlord's question. Please forgive me if there is any mistake.