The multiplication formula of 7 used in life is to learn the multiplication formula of 7 on the basis of learning the multiplication formula of 2-6, and make full use of the thinking method and learning experience of learning the multiplication formula of 2-6.

The textbook presents the results of seven additions in the form of puzzles, so that students can establish the corresponding relationship between "1 7, 27, 37, 77" and "7, 14, 2 1" to prepare for further writing the multiplication formula of 7.

According to the learning experience of multiplication formula, students independently write the multiplication formula of 7. The subsequent "think about it" allows students to use the compiled formula to calculate. When arranging the above contents, the teaching materials should provide students with enough independent learning space to promote students' active exploration.

Teaching objectives:

1. Write the multiplication formula of 7 with the help of existing knowledge and experience, and preliminarily remember the multiplication formula of 7.

2. We can use the multiplication formula of 7 to perform multiplication in the table and solve some simple problems.

3, through the process of writing multiplication formula, cultivate the ability of autonomous learning, cooperate and communicate with classmates, and gain successful experience.

Design concept:

First of all, start with Pleasant Goat that students are interested in, and design a complete link to visit Yangcun. By challenging Pleasant Goat's exercises, the multiplication formula of 1-6 was reviewed.

After entering Yangcun, I took the work Ship by Meiyangyang as an example, and then made up two formulas according to figures and tables: "17 gets 7" and "274". On this basis, enter the second link.

Second, make use of students' existing knowledge and experience, and let students make up the formula independently. At the same time, let the students read and recite their own formulas. The teacher asked, "which formulas are not easy to recite?" Who can have a good way to remember this formula? " Further teach students the method of memorizing formulas. Finally, teachers and students can help students memorize formulas by collectively memorizing passwords and formulas.

Third, design various exercises to let students realize the practical application value of the formula. This link is mainly about calculation, but it is also very interesting. Take saving lazy sheep as the line, and let the students calculate correctly within the specified time.

The multiplication formula of 7 is taught by students after learning the multiplication formula of 1 ~ 6, and the foundation has been established.

I asked a specific question through the situation, "How many plates are used for the number 1 and how many plates are used for the numbers 2, 3 and 7?" Solve problems by addition and fill in tables, paving the way for compiling multiplication formulas.

Then abstract the concrete problem into a mathematical problem, and add the same number, which is the sum of 1 7s and 2 77 7s respectively, which is also 1×7 and 2× 77× 7; According to the multiplication formula, make up the corresponding formula.

This lesson is to let students experience the writing process of the multiplication formula of 7 and understand the meaning of the formula; Recite formulas and improve oral calculation ability; It stands to reason that students have experience in the multiplication formula of 1 ~ 6, and there will be no problem in learning these contents. Some students can learn it quickly, and some students haven't learned the multiplication formula of 7 in a class.