The switching formula is 2:
2 can be divided into 1 and 1, 1 and 1 to synthesize 2.
2 can be divided into 2 and 0, and 2 and 0 can synthesize 2.
2 can be divided into 0 and 2, and 0 and 2 can synthesize 2.
The switching formula is 5:
5 can be divided into 1 and 4, and 1 and 4 can synthesize 5.
5 can be divided into 4 and 1, 4 and 1 to synthesize 5.
5 can be divided into 2 and 3, and 2 and 3 can synthesize 5.
5 can be divided into 3 and 2, and 3 and 2 can synthesize 5.
5 can be divided into 5 and 0, and 5 and 0 can synthesize 5.
5 can be divided into 0 and 5, and 0 and 5 can synthesize 5.
We learned the division of numbers 2, 3, 4 and 5. We first learned about division through teaching AIDS, and then let the children divide with their own bodies (fingers) as learning tools.
In teaching, children are divided into one point, posing and talking, and every link is orderly and serious. Then, let the children go home and use different learning tools to make a pendulum and score a point to strengthen their memory.
Through the teaching activity of "2-5", I have a deep understanding: in this class, I think students are learning very interesting, they are all moving and their thinking is alive.
Open teaching allows students to play with middle school knowledge in understanding, comprehend methods in understanding and explore independently in operation. Students study actively and easily, and feel the joy of learning.
Let the students divide up their own points in class and after class, which grasps the psychological characteristics of children, and at the same time provides students with opportunities for practice, independent exploration, observation and thinking, discovery and expression, stimulates students' participation consciousness and enthusiasm, and cultivates students' practical ability.