The multiplication formula of 9 is the content of 75-76 pages in the third volume of primary school mathematics of Jiangsu Education Publishing House. The multiplication formula is one of the most basic knowledge of multiplication and division in the table, which plays an important role in further learning multiplication and division. The multiplication formula of 9 is taught on the basis of learning the multiplication formula of 1-8. This arrangement helps students to learn new knowledge by using the law of migration. The textbook guides students to compile their own multiplication formulas, gain successful experience in the process of exploring mathematical knowledge, urge students to continuously enhance their self-confidence in learning mathematics, and pay attention to cultivating students' reasoning ability and awareness of applying mathematics.

Analysis of learning situation

Students have mastered the multiplication formula of 1-8 before learning this lesson. After learning this knowledge, students basically mastered the method of compiling multiplication formula, which laid a good foundation for learning the knowledge of this course. The multiplication formula of 9 is different from the previous content, with many sentences and large numbers, which are easy to be confused and the basic situation of students is uneven. Some students may have memorized all the contents of the formula table for a long time, and are unwilling to participate in the formulation process in class, but eager to show themselves; Maybe some students can't recite the formula in one class. Pay close attention to the learning needs of different students in classroom teaching. The classroom is interspersed with games, so that students can have fun and enjoy learning.

Teaching objectives

Knowledge and skills:

1, so that students can understand the arithmetic of 9' multiplication formula and correctly calculate the multiplication formula of 9.

2. Let the students master the multiplication formula of 9.

Process and method:

1, through students' autonomous learning in advance, establish the initial computing ability, and let students further master new knowledge.

2, through independent thinking, cooperation and communication with others, master the meaning of 9 multiplication formula.

Emotional attitudes and values:

1, let students learn to communicate with others and cultivate their sense of cooperation.

2. Cultivate students' interest in learning mathematics.

Teaching emphases and difficulties

Key points: Go through the compilation process of multiplication formula of 9 and master multiplication formula of 9.

Difficulties: Find the law and memorize the multiplication formula of 9 with the law.

teaching process

1, first put forward the classroom requirements for students, and ask the formulas of 7 and 8 by memorizing the multiplication formulas of 7 and 8. Let's guess again. How many words are there in the multiplication formula of 9? What is the difference between every two adjacent sentences? Pave the way for learning the multiplication formula of 9. So as to naturally introduce the theme.

2. Show bears through multimedia to stimulate students' curiosity. By watching pictures of bears eating candied haws, students are eager to do so. Wear paper instead of candied haws. Comply with the psychology of junior two students, and let students explore their thirst for knowledge in hands-on operation. Each student inserts the wrapped candied haws into the foam board on the table in turn, fills in the form, and looks for the multiplication formula of 9. The courseware shows the questions in turn and guides the students to break through the difficulties. Cultivate students' ability to actively participate, dare to explore, be diligent in doing things and think independently. Ask the students to write the multiplication formula of 9 with what they have learned, and report and supplement the formula. Found a pattern. Then the teacher shows the multiplication formula through multimedia courseware according to the students' answers. Give full play to students' main role and develop their thinking.

3. Memorize formulas through finger games. Finger games enhance the interest and make students learn with their hands, mouth and brain happily, which conforms to the characteristics and cognitive laws of lower grade children. Let students use their brains to contact the first or last sentence of the formula, which can help them remember the formula.

4. Let the students fill in the formula, practice first and then answer, and master the multiplication formula of nine. Through the game: multimedia courseware shows "Go to Jiuyuan Store", let students list different formulas, calculate the amount of money they want to buy, cultivate students' innovative thinking and respect personality development.

5. Summary

What did you learn from this lesson? What else don't you understand?