The number of objects can be judged without being influenced by the arrangement of objects, and the recognition number remains unchanged.

Make love.

Can skillfully use the corresponding arrangement method to judge how much, and flexibly use it to become

As many ways as possible to cultivate the flexibility of thinking.

Learn how to compare the number of objects by recording.

Activity preparation:

Some pictures of balloons and lanterns; Draw cards with different groups of objects.

Some building blocks of different colors.

White paper and colored pens for children's operation. Everyone has blocks of different colors.

Activity flow:

1. Game: How many cards of different objects does the teacher draw? Let the children judge quickly. If the number of people is the same, please put your hands above your head. If it is not the same amount, put your hands around your knees. Let's see who reacts fastest.

Second, the National Day party of the Animal Kingdom is under intense preparation. Giraffes and elephants are very busy these days. Elephants are very strong and are responsible for blowing balloons. Look, it blew a lot of balloons. Show red balloons (6) and green balloons (5).

1, please classify the children and arrange them accordingly.

2. Compare whether there are two kinds of balloons, and which color of balloons are more (less) and more (less)? How can we make them as many as possible?

Disrupt the corresponding arrangement, such as squeezing green balloons or changing into Le Ballon Rouge.

Vertical arrangement, Q: Are there as many Red Balloons as Green Balloons now? (Guide children to know that their numbers have not changed no matter how they are arranged)

Giraffes have long necks. It is responsible for hanging lanterns. It hangs four red lanterns for the first time and six lanterns for the second time (two rows are arranged correspondingly).

1, is it the same twice? How much more (less)?

2. How can I make it the same twice? (Remove two more, add more than two, and give one less)

Fourth, in order to entertain guests, they also prepared many building blocks. What color are they (red, green, yellow)? How many blocks of different colors do you want to compare? What should I do? (Children casually answer)

1, demonstrate the method of teaching children to compare corresponding records. Contrast between red and green, first determine the recording symbol, the red one is indicated by red circle, and the green one is indicated by green circle. When recording, take a record and emphasize the corresponding arrangement and comparison. (Teachers and students * * * recorded)

2. Let the children record: the contrast between red and yellow (the teacher records while showing the children). Record with red pen and yellow pen respectively.

3. Let the children take the building blocks themselves and record them while taking them. Get a comparison result.