1. explanation and demonstration: divide two apples into two fruit bowls. Question: How many can it be divided into? Then put the apples in two bowls together and ask:

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What is the sum of 1 and 1? Use numbers to express the formula, and explain the formula: 2- integer, ∧-decomposition number, ∨-composition number, 1 1- partial number. The teacher wrote down the splitting formula on the blackboard: 2 1 1.

∧ ∨ 1 1 2

Reading: 2 can be divided into 1 and 1, 1 and 1 to add up to 2.

2. My own experience: Children freely combine into a group of two, and practice on and off according to the teacher's password. For example, the teacher said: 2 can be divided into 1 and 1, and the two quickly separated. The teacher said: 1 and 1 add up to 2, and the two quickly stood hand in hand.

3. Let children try freely: make full use of building blocks, operate snowflakes, small sticks and so on. When writing exercises are carried out, teachers will tour to guide them and encourage them to discover the composition of numbers.

4. Consolidate the song with "clap your hands".

Clap your hands at the teacher: let me ask you, little friend, how many copies can you divide? Child: A teacher, I tell you, 2 can be divided into 1 and 1.