1. Skillfully use the addition and subtraction within 10, and understand that the same answer can correspond to multiple formulas.

2. Be familiar with some important telephone numbers in life and be willing to know the contact information with your companions.

Activity preparation:

1. 10+0+0+0+0+0+0+0+0+0+0+0+0+0+0+0+0+0+0+0+0+0+0+0+0+0+0.

2. Carry out the theme activity of "I want to go to primary school". Children have a desire to know the contact information of their peers.

Activity flow:

First, the guiding part: review the addition and subtraction within 10.

Teacher: Our children will graduate soon. A few days ago, everyone was talking about the contact information after breaking up, including writing letters, sending greeting cards, dropping in and making phone calls ... Today, we are going to play a game of deciphering phone numbers.

(1) Decipher the phone number by reading the questions.

The teacher shows a digital card consisting of eight addition and subtraction problems, such as 3+3, 7-4, 8+ 1 ...

This link is to help children review the addition and subtraction within 10.

During the activity:

The teacher asked questions from many angles, such as what is the first number of this mobile phone? What number is "6"? What is the last one?

Teacher: You are great! I deciphered the phone number at once. How did you decipher it?

Yang: It was decoded by addition and subtraction.

Teacher: Do you know whose mobile phone this is?

Young: kindergarten.

Teacher: You can call this number in the future if you have something to do or want to. Tell me together. What's the phone number of the kindergarten?

(2) Psychologically deciphering telephone numbers.

1. The teacher showed the second telephone password and asked, Calculate in your mind and keep the answer in your mind. We'll talk about it later.

2. The teacher showed the third telephone password, demanding that it be deciphered accurately and quickly, and deciphered the telephone password at once.

Second, the learning part: set the password for the phone number and decode it.

(1) Calculate the answer according to the formula.

1. Divide the children into four teams: red, green, yellow and blue. Each team has 10 phone numbers. In the form of group competition, compare which team has the greatest ability to decipher the phone number quickly and accurately.

2. Exchange inspection for each group.

Please send a representative from each team to report the score of the other team.

(2) Try to compile the questions according to the answers.

Division; Here are three very special phone numbers. In the future, you should set passwords for these phone numbers within 10. Every number in the phone number is an answer. The password you made will be deciphered by other groups, so the harder it is, the better.

-At the beginning, when the children are asked to compile questions, the numbers provided by the teacher can be small but special (for example,11 19, 120)o to guide the children to understand that one answer can correspond to multiple questions-for example, "/kloc-0" can be used.

1. The children try to ask questions in groups.

These groups exchange questions with each other and decode them.

Please post the decoded phone number on the blackboard.