1, children further practice the decomposition and synthesis of numbers within 10.

2. Let children know the negative sign and help them understand the meaning of subtraction.

3. Children have mastered the operation skills of subtraction within 10.

Key children further practice the decomposition and synthesis of numbers within 10.

It is difficult to master the operation skills of subtraction within 10.

Activities to be prepared

Wall chart "addition and subtraction", candles, plasticine, digital cards, my mathematical operation data, addition and subtraction operation data, additional problem operation data.

Activity process

1, group activities.

Make a cake with 10 candles with plasticine.

This is a magical cake, and we can make a wish for it.

Let the child make a wish before blowing out the candles.

-Count how much is left.

Write the formula 10- 1 = 9.

Let another child blow out the candles.

-Count how much is left.

Write the formula 9- 1 = 8.

2. Group activities.

The first group and the second group: my math data.

The third and fourth groups: add and subtract materials.

Groups 5 and 6: Additional materials.

3. Activity evaluation.

Let the children dictate the homework list and evaluate it jointly by teachers and students.

Please look at the wall chart and do the math problems on it.

Encourage children to participate in operational activities and improve their operational ability.