1, master the calculation method of the addition of 10 and the subtraction of 10, and do the corresponding oral calculation correctly. If you want to achieve good results, you must use it skillfully.

2. Guide students to experience the exploration process of writing another addition formula and two subtraction formulas and calculating the number according to one addition formula, and further understand the objective law of "exchanging the positions of two addition numbers to get the same number".

3. Solve practical problems with the knowledge of addition and subtraction of 10, and cultivate students' awareness of mathematical application. Process and method: Teachers consolidate through students' practice and calculation. Emotional attitude and values: stimulate students' interest in learning and cultivate their love for learning mathematics.

4. Teaching emphasis: Let students learn to add and subtract 10 through operational exploration and cooperative communication. Teaching difficulty: directly calculate the addition and subtraction of 10 with abstract thinking (composition of 10). The key to teaching: master the composition of 10, and understand the meaning of addition and subtraction and the reciprocal relationship.