1, learn the equivalent judgment in 5, and try to verify it by integral method.

2. A preliminary understanding of the invariance of logarithm.

3. Cultivate children's ability to observe, judge and operate.

4. Cultivate children's spirit of trying and develop children's agility and logic of thinking.

5. Stimulate children's interest in learning and experience the happiness of mathematics activities.

Activity preparation:

1. Material preparation: some fruits in summer, pictures of all kinds of fruits, and physical cards with different arrangements within 5.

2. Supporting materials: the theme activity "Put a pendulum and count it".

Activity flow:

1. Touch and guess.

Show me the boxes containing all kinds of fruits, let the children touch them and talk about their feelings.

Put the touched fruit on the plate and let the children count it.

2. Have a look and have fun.

Show the fruit map, guide the children to observe and name the fruits in the map, and count the types of fruits and the number of the same fruits with the same hand and mouth.

3. Swing and count.

Introduce materials and operation methods: guide children to paste different patterns in different squares, and guide children to feel that although the position of each square is different, the number is the same.

Children operate, teachers observe and guide children to express the results of matching activities.